Greenly, Edward. 1919. The geology of Anglesey. London HMSO [For Geological Survey] Two volumes

British Geological Survey photographs

The following are links to the full set of images that were taken by the Survey at the time of mapping.

Link Caption Description Photographer Grid reference
A01193 SE side of Dinas Trefriw. Looking NE. SE side of Dinas Trefriw. Looking NE. Cataclastic schist. Torn lenticles of grit in chloritic phyllite. Rhodes, J. [SH 365 655]
A01194 Gorge, Dinas Trefriw. Looking W. Gorge, Dinas Trefriw. Looking W. Cataclastic schist. Torn lenticles of grit in chloritic phyllite. Rhodes, J. [SH 365 655]
A01195 Dinas Trefriw, (W. side). Looking NW. Dinas Trefriw, (W. side). Looking NW. Cataclastic schist. Torn lenticles of grit in chloritic phyllite. Aberffraw coast in distance. Rhodes, J. [SH 365 655]
A01196 Porth Cadwaladr. Looking W. by S. Porth Cadwaladr. Looking W. by S. Lenticular mass of quartzite in similar cataclastic schist. Rhodes, J. [SH 365 665]
A01197 N. of Careg Gigfran. Looking NE. N. of Careg Gigfran. Looking NE. Lower end of large lenticle of quartzite in cataclastic schist. Rhodes, J.
A01198 N. of Careg Gigfran. Looking NE. N. of Careg Gigfran. Looking NE. Torn lenticles of grit in chloritic phyllite. Rhodes, J.
A01199 Porth Ceffylau. Looking ENE. Porth Ceffylau. Looking ENE. Cataclastic schist. Large lenticles of quartzite above bag; a smaller one of limestone at the cliff's foot in the middle, weathered into a slight recess. Most of the other lenticles and blocks are of grit. Rhodes, J.
A01200 Porth Twyn-mawr. Looking NE. Porth Twyn-mawr. Looking NE. Cataclastic schist. Bedding survives on the right. Schist to its left full of torn fragments and grit and quartzite. Blown sand in background. Rhodes, J. [SH 365 655]
A01201 NE of Glan-y-don. Looking ENE (?). NE of Glan-y-don. Looking ENE (?). Conglomerate at base of Glantraeth Beds ('Millstone Grit') resting against ancient cliff composed of nearly vertical schists (Monian). A small fault in the schists (seen on the left) has determined the old cliff, but the Rhodes, J.
A01202 NE of Glan-y-don. Looking N. NE of Glan-y-don. Looking N. Detail of the same conglomerate as in No. A1201. The further part. Pebbly sandstone overlain by conglomerate full of pebbles of Monian grit (rounded) and phyllite (subangular). Rhodes, J.
A01203 NE Bay of Llyn Maelog. Looking ENE. NE Bay of Llyn Maelog. Looking ENE. Basal Ordovician conglomerate dipping to left. Bare dip-slope (on the other side of lake) of Monian granite and hornfels. Rhodes, J. [SH 325 725]
A01204 Coast at Rhoneigr. Looking ENE. Coast at Rhoneigr. Looking ENE. Cleavage and bedding in Arenig Black Shale, with thin hard grits. Folding pitches towards camera. Stick 1 yard long. Bag 12 inches. Rhodes, J. [SH 315 735]
A01205 About 1/2 m. SW of Eilian House, Tywyn Trewan. Looking N. About 1/2 m. SW of Eilian House, Tywyn Trewan. Looking N. Boulder of Monian granite in Arenig conglomerate. Rhodes, J. [SH 315 755]
A01206 Bryn-llwyd, Newborough. Looking SW. Bryn-llwyd, Newborough. Looking SW. Desert scenery. Great drifts of sand around bosses of pillowy lava. (Bosses 40 to 50 feet high.) Rhodes, J. [SH 395 645]
A01207 S. of Cadair-y-Cythrael, Newborough. Looking NNE. S. of Cadair-y-Cythrael, Newborough. Looking NNE. Nodular and lenticular limestone. With streaks of purple schist at the divisional planes. Rhodes, J.
A01208 S. of Cerig Mawr, Newborough. Looking WNW. S. of Cerig Mawr, Newborough. Looking WNW. Great Jasper in limestone. Stick and bag at junctions of jasper in limestone. Stick in sunshine. Bag in deep shadow. Pillowy lava in background. Rhodes, J. [SH 395 645]
A01209 Cerig Mawr, Newborough. Looking E. Cerig Mawr, Newborough. Looking E. Jasper in pillowy diabase lava. Handle of hammer against jasper. Small type of ellipsoid. Rhodes, J. [SH 395 645]
A01210 NW of Cerig Mawr, Newborough. Looking NE. NW of Cerig Mawr, Newborough. Looking NE. Pillowy diabase lava. Large type of ellipsoid. Rhodes, J. [SH 395 645]
A01211 SW of Bryn-llwyd, Newborough. Looking NE. SW of Bryn-llwyd, Newborough. Looking NE. Pillowy diabase lava. Largest ellipsoids. (Figure for scale.) Rhodes, J. [SH 395 645]
A01212 E. of Bryn-llwyd, Newborough. Looking NNE. E. of Bryn-llwyd, Newborough. Looking NNE. Complex limestone in purple schist amid blown sand. Malldraeth Marsh with lagoon in distance. Skyline of Menaian Platform beyond. Rhodes, J. [SH 395 645]
A01213 View of Anglesey from Menai Bridge. Looking NNW. View of Anglesey from Menai Bridge. Looking NNW. The Menaian Platform from Carnarvonshire. Top of Suspension Bridge Pier in middle of picture. The Menai Strait in middle distance but not seen. Llwydiarth Monadnock, six miles away. To right, Bodafon Monadn Rhodes, J. [SH 555 725]
A01214 Menai Strait from Menai Bridge. Looking NE. Menai Strait from Menai Bridge. Looking NE. The eastern reach of the Menai Strait. Beaumaris in the distance with open sea beyond. The eastern part of the Menaian Platform. Width of strait at this point about ? mile. Rhodes, J. [SH 555 725]
A01215 Gravel-pit, 1/2 m. W. of Menai Bridge. Looking N. Gravel-pit, 1/2 m. W. of Menai Bridge. Looking N. Glacial sands and gravels. West end of Ty'n y caean pit. (Stick one yard long.) Rhodes, J. [SH 545 725]
A01216 Gravel-pit, 1/2 m. W. of Menai Bridge. Looking N. Gravel-pit, 1/2 m. W. of Menai Bridge. Looking N. East end (of Ty'n y caean pit). Same sands and gravels of pit as No. A1215. Gravel with vertical pebbles eroding horizontal sand on right. Rhodes, J. [SH 545 725]
A01217 Torllwyn and Craigwen, from Porth Pridd. Looking WNW. Torllwyn and Craigwen, from Porth Pridd. Looking WNW. In Headland of Torllwyn. Llandeilo conglomerate and grits, with purple conglomerate to right of moorland wall. Then the same series repeated as far as brickworks, but very decomposed. To left of works, Rhodes, J. [SH 405 945]
A01218 Foreshore of Torllwyn, Porth Wen. Looking E. Foreshore of Torllwyn, Porth Wen. Looking E. Cleavage (parallel to hammer-shaft) and bedding in conglomerate and sandy shale. A little north of the purple conglomerate. Junction of coarse and fine beds shredded out along cleavage. Trwyn Bychan (see No. A1 Rhodes, J. [SH 405 945]
A01219 Foreshore of W. side of Porth Wen. Looking WNW. Foreshore of W. side of Porth Wen. Looking WNW. The purple conglomerate of No. A1217. Boulder of Monian quartzite about 12 inches long in it. Cleavage nearly vertical. Thrust plane traversing conglomerate from north at lower angle. Rhodes, J. [SH 405 945]
A01220 Trwyn Bychan (N. Cliff). Looking E. Trwyn Bychan (N. Cliff). Looking E. Bare sole of the Trwyn Bychan thrust plane in foreground. Vertical cliff on Monian Schistose tuff with highly inclined foliation planes resting on the thrust plane. Rhodes, J. [SH 405 945]
A01221 Foot of Ogo Gynfor, Cliff. Looking ESE. Foot of Ogo Gynfor, Cliff. Looking ESE. Llandeilo conglomerate resting unconformably upon Monian ('Llanbydrig') quartzite and containing boulders of them. Rhodes, J.
A01222 Cemlyn Bay Lagoon. Looking NE. Cemlyn Bay Lagoon. Looking NE. Cemlyn Lagoon, behind great shingle-ridge. Rhodes, J. [SH 335 925]
A01223 Porth-y-Ebol. Looking ENE. Porth-y-Ebol. Looking ENE. The Carmel Head thrust plane. Monian chloritic phyllites resting upon cleaved Ordovician Shales. Rhodes, J. [SH 355 945]
A01225 Cove S. of Porth-y-Wig, Carmel Head. Looking W. Cove S. of Porth-y-Wig, Carmel Head. Looking W. Another view of No. A1224. [Permian Middle marl. Shows marl with beds of soft, very marly sandstone. The whole resembles a section of Keuper Waterstones.] Rhodes, J. [SH 295 925]
A01226 Cove E. of Porth-y-Wig, Carmel Head. Looking ENE. Cove E. of Porth-y-Wig, Carmel Head. Looking ENE. Masses of quartzite and limestone in Monian phyllitic schist. The light masses in front are limestone, the further ones quartzite (with some smaller limestones). Rhodes, J. [SH 295 925]
A01227 Porth Ddyfn, Carmel Head. Looking NNW. Porth Ddyfn, Carmel Head. Looking NNW. Ordovician Shale with double cleavage. Rhodes, J. [SH 295 925]
A01228 N. of Ogo Arian, Carmel Head. Looking E. N. of Ogo Arian, Carmel Head. Looking E. Micaceous gneiss with granitoid seams. Rhodes, J. [SH 295 925]
A01229 N. of Ogo Arian, Carmel Head. Looking NE. N. of Ogo Arian, Carmel Head. Looking NE. Foliated granite with inclusions of gneiss. Rhodes, J. [SH 295 925]
A01230 Cliff, N. of Porth Faur Llwynog, Carmel Head. Looking ENE. Cliff, N. of Porth Faur Llwynog, Carmel Head. Looking ENE. Lenticular granite bands in gneiss. Rhodes, J. [SH 295 925]
A01231 Porth-y-Hwch-Fach. Looking ENE. Porth-y-Hwch-Fach. Looking ENE. Thrust plane on left, driving foliated granite over Ordovician shale and grit. Rhodes, J.
A01232 Porth-y-Hwch-Fach. Looking ENE. Porth-y-Hwch-Fach. Looking ENE. Thrust plane in cove driving Fydlyn Beds on to Ginia Beds. Rhodes, J.
A01233 Mynydd-y-Garn, from Rhosgoch. Looking WNW. Mynydd-y-Garn, from Rhosgoch. Looking WNW. The 'Monadnock' of Mynydd-y-Garn (about 550 ft.) in the distance. To its right, Pen Bryn yr Eglwyn near Carmel Head. Nearer, to the left, rising ground of the Barrier. Between it and the viewpoint, we look across Rhodes, J. [SH 405 895]
A01234 Pant-y-Cola, from Rhosgoch. Looking ENE. Pant-y-Cola, from Rhosgoch. Looking ENE. Escarpment and bare sole of the Carmel Head Thrust plane. Mynydd Mechell schists thrust at low-angle on Ordovician Shales. Rhodes, J. [SH 405 895]
A01235 Gwaen-y-dog, from Llanol. Looking WNW. Gwaen-y-dog, from Llanol. Looking WNW. The same as No. A1234. Thrust plane almost horizontal. [Escarpment and bare sole of the Carmel Head thrust plane. Mynydd Mechell schists thrust at low-angle on Ordovician Shales.] Rhodes, J. [SH 375 885]
A01236 Gareg Fawr. Looking N. Gareg Fawr. Looking N. Brecciation on the sole of the Carmel Head Thrust plane. Just below escarpment at the left of the last view, but not in sight. Plane horizontal. Schists (light) and Shales (dark) interfaulted on left. Confused breccia at foot. Block Rhodes, J. [SH 365 885]
A01237 E. end of West Pit, Parys Mountain. Looking NE. E. end of West Pit, Parys Mountain. Looking NE. Fold in silicified Silurian shale. Silicified felsite behind and above. Boulder clay on top to left. Mine debris on skyline. Rhodes, J. [SH 445 905]
A01238 S. side of West Pit, Parys Mountain. Looking SE. S. side of West Pit, Parys Mountain. Looking SE. Boulder clay resting on shale. Mine debris above. The hard bands are 'Gossan', which is ferrified boulder clay. Rhodes, J. [SH 445 905]
A01239 W. side of East Pit, Parys Mountain. Looking W. W. side of East Pit, Parys Mountain. Looking W. Strike-vein of pyrites (light) cutting silicified shale. Two 'cross-courses' of pyrites near bottom. Many small quartz-veins. Rhodes, J. [SH 445 905]
A01240 East Pit, Parys Mountain. Looking ENE. East Pit, Parys Mountain. Looking ENE. Crag of silicified shale, hard and massive-looking. Surviving cleavage seen on left, at lower angle than bedding. Rhodes, J. [SH 445 905]
A01241 East Pit, Parys Mountain. Looking ENE. East Pit, Parys Mountain. Looking ENE. Just left of No. A1240. Silicification obliterating cleavage in Silurian shale. Cleavage survives in upper part. Massive silicified parts below and to right, and in them, old cleavage planes filled with thin quartz-p Rhodes, J. [SH 445 905]
A01242 West Pit, Parys Mountain. Looking NE. West Pit, Parys Mountain. Looking NE. Silicified felsite on left; silicified shale on right. Engine-house chimney stands on a crag of silicified shale in bottom. (Subject of No. A1237 at end of pit.) Boulder clay from the right of windmill nearly to left Rhodes, J. [SH 445 905]
A01243 Coast at Amlwch, Traeth Dynion. Looking NNE. Coast at Amlwch, Traeth Dynion. Looking NNE. Variolitic diabase between bedded jaspers. Stick standing across diabase. Bag at its top. Rhodes, J. [SH 445 935]
A01244 Coast of Amlwch, E. side of Porth Offeiriad. Looking NNE. Coast of Amlwch, E. side of Porth Offeiriad. Looking NNE. Hard and soft bands in schistose grits. Foliation sometimes oblique to bedding. Rhodes, J. [SH 445 935]
A01245 Amlwch Port (W. side). Looking NNW. Amlwch Port (W. side). Looking NNW. Schistose grits. Foliation oblique to bedding. Shredding of beds along foliation. Rhodes, J. [SH 445 935]
A01246 Amlwch Port (E of village). Looking ENE. Amlwch Port (E of village). Looking ENE. Rapid folding in Amlwch Schists. Axis vertical. Rhodes, J. [SH 455 935]
A01247 Amlwch Port, (by the Pool), E. of village. Looking E. Amlwch Port, (by the Pool), E. of village. Looking E. Rapid folding in bedded jaspers and purple phyllites. Rhodes, J. [SH 455 935]
A01248 Sea cliffs W. of Aber Cawell. Looking WNW. Sea cliffs W. of Aber Cawell. Looking WNW. Ice-moulded cliffs of northern coast. Rhodes, J.
A01249 The Moor, E. of Amylwch Port, (from near 'The Pool'). Looking ENE. The Moor, E. of Amylwch Port, (from near 'The Pool'). Looking ENE. Characteristic bossy scenery. (Amlwch Schists.) Point Lynas with lighthouse in the distance. Rhodes, J. [SH 455 935]
A01250 Boulder of W. Cliff of Porth Eilian. Looking ESE. Boulder of W. Cliff of Porth Eilian. Looking ESE. Boulder of Galloway Granite. Rhodes, J. [SH 475 935]
A01251 Eastern side of Porth Eilian. (From boat.) Looking E. Eastern side of Porth Eilian. (From boat.) Looking E. Folding at Amlwch Schists. Rhodes, J. [SH 475 935]
A01252 Eastern side of Porth Wnol. Looking N. Eastern side of Porth Wnol. Looking N. Great cataclastic lenticles of quartzite in rudely schistose breccia. Late dolerite dyke (probably Tertiary) in gap on right. Rhodes, J. [SH 355 945]
A01253 Cliff, Trwyn-y-Parc, Cemaes Bay. Looking ESE. Cliff, Trwyn-y-Parc, Cemaes Bay. Looking ESE. Typical 'crush conglomerate'. Lumps of grey grit in matrix of broken grit and phyllite. Rhodes, J. [SH 365 935]
A01254 Cliff, Trwyn-y-Parc, Cemaes Bay. Looking NNE. Cliff, Trwyn-y-Parc, Cemaes Bay. Looking NNE. Typical 'crush conglomerate'. Left side of same cliff (No. A1253). Rhodes, J. [SH 365 935]
A01255 S. side of Porth-y-mor. Looking W. S. side of Porth-y-mor. Looking W. Alternating cornstones and sandstones. Sandstones thin-bedded. Cleavage visible in upper cornstones. Rhodes, J. [SH 495 885]
A01256 S. side of Porth-y-mor. Looking SE. S. side of Porth-y-mor. Looking SE. Alternating red sandstones, and grey nodular cornstones in lower part. Thick cornstones at top with cleavage seen obliquely. Boulder clay under grass. Rhodes, J. [SH 495 885]
A01257 Coast between Porth-y-mor and Lligwy Bay. Looking E. Coast between Porth-y-mor and Lligwy Bay. Looking E. Sandstone to right. Thick (light) cornstone in middle. Beds vertical. Cleavage nearly horizontal. Stick parallel to cleavage. Carboniferous Limestone of Moelfre Point in distance. Rhodes, J. [SH 495 885]
A01258 S. side of Lligwy Bay. Looking SE. S. side of Lligwy Bay. Looking SE. The Lligwy Bay Conglomerate (Carboniferous). Pebbly sandstones above it. Stick resting on boulder of Parys Mountain Silicified Shale. Boulder about 15 inches long, to left of stick, is of Ordovician conglomerate. Rhodes, J. [SH 505 875]
A01259 Foreshore, S. side of Lligwy Bay. Looking NE. Foreshore, S. side of Lligwy Bay. Looking NE. Contemporaneous erosion in Carboniferous Limestone. Conglomerate in crevices, and lumps of limestone in conglomerate. Rhodes, J. [SH 505 875]
A01260 Careg Ddafad, Lligwy Bay. Looking S. Careg Ddafad, Lligwy Bay. Looking S. Vertical beds at the contemporaneous disturbance at the base of the Carboniferous Limestone. Limestone conglomerate on the left. Rhodes, J. [SH 505 875]
A01261 Cliffs from foot of S. side of South Stack. Looking ENE. Cliffs from foot of S. side of South Stack. Looking ENE. The great folds of the South Stack Series. Axes nearly vertical. Minor folds visible in softer beds, axes inclined to north-west. Vertical foliation in harder beds. Rhodes, J. [SH 205 825]
A01262 Cliffs from W. end of Bridge, South Stack. Looking ENE. Cliffs from W. end of Bridge, South Stack. Looking ENE. Detail of large fold. Corrugation in softer beds, vertical foliation in harder. Face of cliff 50 feet back from grass, across a sea-chasm 70 feet deep. Rhodes, J. [SH 205 825]
A01263 Cliff from N. side of South Stack. Looking ENE. Cliff from N. side of South Stack. Looking ENE. Folding in the South Stack Series. North of the Bridge. Cliffs of the quartzite in the background. Rhodes, J. [SH 205 825]
A01264 Cliff structures from end of South Stack, from Signal Station. Looking ENE. Cliff structures from end of South Stack, from Signal Station. Looking ENE. Bedding and foliation on the South Stack. North limb of anticline. Rhodes, J. [SH 205 825]
A01265 Coast, New Harbour, Holyhead. Looking ENE. Coast, New Harbour, Holyhead. Looking ENE. Typical folding in Harbour Schists. No perceptible displacement along cracks. Rhodes, J. [SH 245 835]
A01266 Coast NE of Admiralty House, Salt Island, Holyhead. Looking ENE. Coast NE of Admiralty House, Salt Island, Holyhead. Looking ENE. Folding and slipping in Harbour Schists. Rhodes, J. [SH 255 835]
A01267 Breakwater Rocks, Holyhead. Looking ENE. Breakwater Rocks, Holyhead. Looking ENE. Typical folding in Harbour Schists. Rhodes, J. [SH 235 835]
A01268 Breakwater Rocks, Holyhead. Looking ENE. Breakwater Rocks, Holyhead. Looking ENE. Rapid folding in Harbour Schists. Being right-hand part of No. A1267, enlarged. Sharp unbroken folding. Rhodes, J. [SH 235 835]
A01269 Cliff at Porth Morgan, Porth Defarch. Looking NE. Cliff at Porth Morgan, Porth Defarch. Looking NE. Overfolding in South Stack Series. Beds remaining vertical. Cross foliation. Rhodes, J. [SH 235 795]
A01270 Penial Hill, Llanfwrog. Looking NW. Penial Hill, Llanfwrog. Looking NW. Penial Drumlin. Cliff at its left end all boulder clay, resting on platform of rock at sea-level. Typical drumlin seen at right-angles to major axis. Low sand-dunes in foreground. Cliff 50 feet high. Rhodes, J. [SH 305 845]
A01271 Clegyr Mawr, Gwalchmai. Looking NNW. Clegyr Mawr, Gwalchmai. Looking NNW. Band of foliated granite in hornblende gneiss. Rhodes, J. [SH 375 775]
A01272 Clegyr Mawr, Gwalchmai. Looking NE. Clegyr Mawr, Gwalchmai. Looking NE. Granitoid knots in hornblende gneiss. Foliation of gneiss dipping away from camera. Thin light bands of gneiss sharply folded. Rhodes, J. [SH 375 775]
A01273 Clegyr Mawr, Gwalchmai. Looking NE. Clegyr Mawr, Gwalchmai. Looking NE. Well-foliated hornblende gneiss with acid lenticles. Rhodes, J. [SH 375 775]
A01274 Clegyr Mawr, Gwalchmai. Looking ENE. Clegyr Mawr, Gwalchmai. Looking ENE. Same section. Hornblende gneiss with coarse acid bands and veins and unfoliated basic knots. One of these to left of hammer. Light part at top merely weathered joint-plane. Rhodes, J. [SH 375 775]
A01275 Clegyr Mawr, Gwalchmai. Looking NNE. Clegyr Mawr, Gwalchmai. Looking NNE. Same section. Detail a few yards to left of A1274. Hornblende gneiss. Hammer 12? inches. Rhodes, J. [SH 375 775]
A01276 Clegyr Mawr, Gwalchmai. Looking SE. Clegyr Mawr, Gwalchmai. Looking SE. Ice-worn boss of hornblende gneiss, (20 to 30 feet high). Rhodes, J. [SH 375 775]
A01277 Craig Allor, Gwalchmai. Looking NE. Craig Allor, Gwalchmai. Looking NE. Scenery of the hornblende gneiss. Bodanon Monadnock, 8 miles away, to left of high boss. Bosses 40 to 50 feet high. Rhodes, J. [SH 385 765]
A01278 S. side of Holyhead Road, 1/2 m. SW of Craig Allor. Looking ENE. S. side of Holyhead Road, 1/2 m. SW of Craig Allor. Looking ENE. Granite sill on foliated mica hornfels. Hammer 12? inches. Rhodes, J. [SH 375 765]
A01279 Coast at Graig Llwyd, Holyhead. Looking NE. Coast at Graig Llwyd, Holyhead. Looking NE. Similar to A1278. [Granite sill on foliated mica hornfels.] Folds pitching away from observer. Cross foliation well marked. Boulder of Porth Defarch dolerite in foreground. Rhodes, J.
A01280 Cliff of Clybyddiad, Holyhead. Looking ENE. Cliff of Clybyddiad, Holyhead. Looking ENE. Similar to A1278. [Granite sill on foliated mica hornfels.] Massive bed almost unfolded, thin beds close to it corrugated. Cross-foliation moderate. Rhodes, J.
A01281 Holyhead Mountain from near Dinas. Looking NNW. Holyhead Mountain from near Dinas. Looking NNW. Holyhead Mountain (monadnock). South Stack Moor to left of summit, with the two small outliers of quartzite. Ellens' Tower on Cliffs' Brow at extreme left. Rhodes, J. [SH 215 825]
A01282 Long Creek, SE of Pen-Rhyn-Mawr, Holyhead. Looking NNW. Long Creek, SE of Pen-Rhyn-Mawr, Holyhead. Looking NNW. Isoclinal folds pitching to right. Holyhead Mountain in distance. Rhodes, J. [SH 215 795]
A01283 Creek SE of Pen-Las Rock, from across Bay, Gors-goch, Holyhead. Looking NNW. Creek SE of Pen-Las Rock, from across Bay, Gors-goch, Holyhead. Looking NNW. The Henborth Dyke. Penlas Rock and South Stack to left of dyke. Height of cliff at dyke about 200 feet. (scale). Rhodes, J. [SH 205 815]
A01284 Cliff W. of Porth-y-Graig, Porth-y-Graig House, Holyhead. Looking WNW. Cliff W. of Porth-y-Graig, Porth-y-Graig House, Holyhead. Looking WNW. Great Stack of Henborth Dyke. Cutting isoclinally folded South Stack Series. Scale: Stack about 100 feet. Rhodes, J.
A01285 Summit crags of Holyhead Mountain, from near South Stack. Looking ENE. Summit crags of Holyhead Mountain, from near South Stack. Looking ENE. Inland crags of the 'North Stack Fault'. With summit of Holyhead Mountain. Crag about ? mile away. Viewpoint about 450 feet above sea-level. Rhodes, J. [SH 205 825]
A01286 Sea cliffs S. of Holyhead Mountain, showing North Stack. Looking NNE. Sea cliffs S. of Holyhead Mountain, showing North Stack. Looking NNE. Sea cliffs of the quartzite with the North Stack. The North Stack Fault brings the South Stack against the quartzite. This view nearly joins up with the last one. Highest point seen 582 Rhodes, J. [SH 215 835]
A01287 Cliff face, from end of South Stack, below Signal Station. Looking ENE. Cliff face, from end of South Stack, below Signal Station. Looking ENE. Base of bed in foreground of A1264. Folding of thin beds with strain-slip along foliation. Massive beds unfolded. Hammer 12? inches. Rhodes, J. [SH 205 825]
A01288 Sea cliffs of Holyhead Mountain, from Holyhead Signal Station. Looking SSE. Sea cliffs of Holyhead Mountain, from Holyhead Signal Station. Looking SSE. The North Stack Fault. South Stack Series on right faulted against massive quartzite. Fault fissures visible hading to east. Bedding of the quartzite seen in the foreground cliffs Rhodes, J. [SH 215 835]
A01428 Porth Namarch. Looking NW by N. Porth Namarch. Looking NW by N. The Namarch Fault. The South Stack Series brought down against Quartzite. Rhodes, J. [SH 225 835]
A01429 Porth Namarch. Looking WNW. Porth Namarch. Looking WNW. The Namarch Fault. The South Stack Series brought down against quartzite. Fallen blocks in gap of fault. Fine bedding in South Stack Series. Rhodes, J. [SH 225 835]
A01430 Station yard, Llanerchymedd. Looking WNW. Station yard, Llanerchymedd. Looking WNW. Ice-worn boss. Of Ordovician grit and shale. Striae nearly parallel to strike. Rhodes, J. [SH 425 835]
A01431 E. side of railway, E. of N. of Mynydd-mwyn-mawr. Looking N. by W. E. side of railway, E. of N. of Mynydd-mwyn-mawr. Looking N. by W. Boulder of hornblende picrite in field. 18 feet.x 9 x 6. Rhodes, J. [SH 415 815]
A01432 W. side of railway, E. by S. of Mynydd-mwyn-mawr. Looking NNW. W. side of railway, E. by S. of Mynydd-mwyn-mawr. Looking NNW. Great boulder of hornblende picrite in field. 14 feet, x 10 x 8. Floor of Ordovician shale seen to right in front of boulder. Rhodes, J. [SH 415 815]
A01433 General view of Bodafon Mountain from hilltop above Mynydd-mwyn-mawr. Looking ENE. General view of Bodafon Mountain from hilltop above Mynydd-mwyn-mawr. Looking ENE. Menaian Platform with Bodafon Monadnock. Skyline to right of Bodafon chielfy Carboniferous Limestone. Middle distance chiefly Ordovician and Mona Complex. Bodafon about 4 m Rhodes, J. [SH 405 825]
A01434 Parys Mountain from hilltop above Mynydd-mwyn-mawr. Looking N. by E. Parys Mountain from hilltop above Mynydd-mwyn-mawr. Looking N. by E. Parys Monadnock. Menaian Platform to its left. Llanerchymedd town in middle distance. Parys about 5 miles distant. Its windmill, etc., obliterated. Rhodes, J. [SH 405 825]
A01435 Hen-blas. Looking NNW. Hen-blas. Looking NNW. Banded gneisses. Granitoid bands in biotite gneiss. Rhodes, J. [SH 465 925]
A01436 Hen-blas. Looking NNW. Hen-blas. Looking NNW. Banded gneisses. Granitoid bands in biotite gneiss. Thick band (with hammer on it) truncates thin ores. Rhodes, J. [SH 465 925]
A01437 Hen-blas. Looking N. by W. Hen-blas. Looking N. by W. Banded gneisses. Granitoid bands in biotite gneiss. Rhodes, J. [SH 465 925]
A01438 Hen-blas. Looking N. Hen-blas. Looking N. Large lenticles of granite in biotite gneiss. Rhodes, J. [SH 465 925]
A01439 Hen-blas. Looking E. Hen-blas. Looking E. Banded gneisses. Inclusions of gneiss in granite bands. Rhodes, J. [SH 465 925]
A01440 Hen-blas. Looking SE. Hen-blas. Looking SE. Banded gneisses showing folding. Rhodes, J. [SH 465 925]
A01441 Headland, W. of Porth Wnol. Looking WNW. Headland, W. of Porth Wnol. Looking WNW. Ice-worn cliffs of Cemlyn Schists. Rhodes, J.
A01442 Middle Mouse, from Wylfa Head. Looking NE. Middle Mouse, from Wylfa Head. Looking NE. Middle Mouse. Distance of Mouse from Wylfa Head about 2 miles. Cliffs of Ogo Gymnfor seen across Bay. Rhodes, J. [SH 355 945]
A01443 The Skerries from Carmel Head. Looking NW. The Skerries from Carmel Head. Looking NW. The Skerries, from Carmel Head, about 2 miles away. Rhodes, J. [SH 295 925]
A01444 Cove, S. of Porth-y-wig, Carmel Head. Looking N. Cove, S. of Porth-y-wig, Carmel Head. Looking N. Carmel Head thrust plane. Mica schist thrust in cleaved Ordovician shales. (A near view of the subject of No. A1224.) Rhodes, J. [SH 295 925]
A01445 Cove, S. of Porth-y-wig, Carmel Head. Looking N. by E. Cove, S. of Porth-y-wig, Carmel Head. Looking N. by E. Carmel Head thrust plane. Mica schist thrust on cleaved Ordovician shales. (A near view of the subject of No. A1224.) Rhodes, J. [SH 295 925]
A01446 Cove, S. of Porth-y-wig, Carmel Head. Looking ESE. Cove, S. of Porth-y-wig, Carmel Head. Looking ESE. Headland showing contorted mica-schists. Rhodes, J. [SH 295 925]
A01447 The Northern Headlands, from Carmel Head Beacons. Looking E. by W. The Northern Headlands, from Carmel Head Beacons. Looking E. by W. Llaneilian Head in distance. Mynachty and Cemlyn Drumlins in mid-distance. Rhodes, J. [SH 295 925]
A01448 Mynydd Eilian and Nebo, from Burwen. Looking E. Mynydd Eilian and Nebo, from Burwen. Looking E. Mynydd Eilian and Nebo monadnocks. 585ft, and 550 feet. 3 miles away. Rhodes, J. [SH 415 935]
A01449 Panoramic view of Dinas Cliffs, from Penrhyn. Looking SW. Panoramic view of Dinas Cliffs, from Penrhyn. Looking SW. Scenery of the Carboniferous Limestone. [With A1450.] The Dinas Valley fault runs out to sea to the left of the high cliff. A1450. Basalt dyke in Carboniferous Limestone. Rhodes, J. [SH 515 845]
A01450 Panoramic view of Dinas Cliffs, from Penrhyn. Looking SW. Panoramic view of Dinas Cliffs, from Penrhyn. Looking SW. Scenery of the Carboniferous Limestone. [With A1449]. The Dinas Valley fault runs out to sea to the left of the high cliff. A1450. Basalt dyke in Carboniferous Limestone. Rhodes, J. [SH 515 845]
A01451 Traeth Bychan. Looking WNW. Traeth Bychan. Looking WNW. Basalt dyke in Carboniferous Limestone. Rhodes, J. [SH 515 845]
A01476 A little SW of Graig-fawr, Holland Arms. Looking ENE. A little SW of Graig-fawr, Holland Arms. Looking ENE. Mica-schist with quartz augen. Rhodes, J.
A01477 A little SW of Graig-fawr. Looking N. by E. A little SW of Graig-fawr. Looking N. by E. The same as No. A1476, with rapid folding. [Mica-schist with quartz augen.] Rhodes, J.
A01478 Callaway's Knob', Graig-fawr. Looking NE. Callaway's Knob', Graig-fawr. Looking NE. Boss of mica-schist after felsite. Same as No. A1477 (Callaway's Knob). Crags of dioritic gneiss on the left. Rhodes, J.
A01479 Graig-fawr. Looking NE. Graig-fawr. Looking NE. Mica-schist after felsite (Callaway's Knob). Foliation beginning to develop. Rhodes, J.
A01480 Cliff, about 300 yd. SW of Foel Pier. Looking NW. Cliff, about 300 yd. SW of Foel Pier. Looking NW. Red marls overlain by glacial gravels. Top of marls about 8 ft. from beach. Rhodes, J. [SH 475 645]
A01481 Boulder, W. by N. from Trefarthen. Looking N. Boulder, W. by N. from Trefarthen. Looking N. Boulders of mica-schist. 18 ft. x 9 x 6. The tree is growing in the crack. Rhodes, J. [SH 485 665]
A01482 Boulder WNW from Tefarthen. Looking N. by E. Boulder WNW from Tefarthen. Looking N. by E. Boulder of mica-schist. 24ft.x 12 x 18. Rhodes, J. [SH 485 665]
A01483 Llangwyfan Church. Looking S. Llangwyfan Church. Looking S. Llangwyfan Church on islet of boulder clay. Walled around to check marine erosion. Rhodes, J. [SH 335 705]
A01484 Llangwyfan Church. Looking SW. Llangwyfan Church. Looking SW. The same islet. It rests on a reef of mica-schist, entirely covered at high water. Rhodes, J. [SH 335 705]
A01485 Porth China Head. Looking SW. Porth China Head. Looking SW. Limestone and graphite schist in mica-schist, with quartz-schist to right. Rhodes, J. [SH 335 685]
A01486 Porth Nobla. Looking E. Porth Nobla. Looking E. Foliation in mica-schist. Near the margin of the hornfels. Rhodes, J. [SH 325 715]
A01487 Careg Lydan. Looking NNE. Careg Lydan. Looking NNE. Lenticular siliceous green hornfels. Rhodes, J. [SH 325 725]
A01488 Cliff about 100 yd. SW of Garth Lodge. Looking NW. Cliff about 100 yd. SW of Garth Lodge. Looking NW. Old dyke of Beaumaris Road, cutting schists. Rhodes, J. [SH 575 745]
A01489 Cliff, NE of Garth Ferry, Menai Straits. Looking NNE. Cliff, NE of Garth Ferry, Menai Straits. Looking NNE. Sheared pillowy diabase. Rhodes, J. [SH 585 745]
A01490 Cliff, 450 yd. NE of Garth Lodge, (Menai Straits). Looking N. by E. Cliff, 450 yd. NE of Garth Lodge, (Menai Straits). Looking N. by E. Lenticular augen of grit in chloritic phyllites. Quartz schist below. Rhodes, J. [SH 585 745]
A01491 Cliff, 750 yd. NE of Garth Lodge, (Menai Straits). Looking NE by E. Cliff, 750 yd. NE of Garth Lodge, (Menai Straits). Looking NE by E. Lenticular shearing at base of Main Limestone. Main Limestone slightly fissile. Lenticular limestone and phyllites below. Rhodes, J. [SH 585 745]
A01492 Cliff, 400 yd. E. of Pen-y-parc, (Menai Straits). Looking NW. Cliff, 400 yd. E. of Pen-y-parc, (Menai Straits). Looking NW. Dykes of older series cutting chloritic phyllites. Zone of shearing. Rhodes, J. [SH 595 755]
A01493 Cliff, 400 yd. E. of Pen-y-parc, (Menai Straits). Looking NW. Cliff, 400 yd. E. of Pen-y-parc, (Menai Straits). Looking NW. The same dyke. Vertical shear-zone passing into dyke at foot of cliff. Quartz in shear-zone. Rhodes, J. [SH 595 755]
A01494 Cliffs, 30 yd. NE of No. A1492, (Menai Straits). Looking N. by E. Cliffs, 30 yd. NE of No. A1492, (Menai Straits). Looking N. by E. Chloritic phyllites. With folded seams of venous quartz. Hammer (12 inches) resting on a slide-plane. Rhodes, J. [SH 595 755]
A01495 Cliff, 100 yd. SW of No. A1492, (Menai Straits). Looking WNW. Cliff, 100 yd. SW of No. A1492, (Menai Straits). Looking WNW. Three small dykes of older series. Rhodes, J. [SH 595 755]
A01496 Cliff, 30 yd. E. of bathing house, (Menai Straits), Garth Ferry. Looking NE. Cliff, 30 yd. E. of bathing house, (Menai Straits), Garth Ferry. Looking NE. Lenticular augen of quartzite in chloritic phyllites. Rhodes, J. [SH 585 745]
A01497 Cliff, 100 yd. ENE of bathing house, (Menai Straits), Garth Ferry. Looking NE. Cliff, 100 yd. ENE of bathing house, (Menai Straits), Garth Ferry. Looking NE. Chloritic phyllites. With lenticular seams of venous quartz. Rhodes, J. [SH 585 745]
A01498 Fallen block of foreshore, 100 yd. ENE of Bathing House, (Menai Straits), Garth Ferry. Looking W. Fallen block of foreshore, 100 yd. ENE of Bathing House, (Menai Straits), Garth Ferry. Looking W. Linear foliation on dip-slope of chloritic phyllites. Rhodes, J. [SH 585 745]
A01499 Cliff, 80 yd. ENE of bathing house, (Menai Straits), Garth Ferry. Looking NE by E. Cliff, 80 yd. ENE of bathing house, (Menai Straits), Garth Ferry. Looking NE by E. Chloritic phyllites with twisted lenticular augen of quartzite. Rhodes, J. [SH 585 745]
A01500 Pen-y-parc, Beaumaris. Looking NW. Pen-y-parc, Beaumaris. Looking NW. Top of lenticular quartzite. Dipping under siliceous chloritic schist. Rhodes, J. [SH 585 745]
A01501 SW end of Ynys-gaint. Looking NE. SW end of Ynys-gaint. Looking NE. Quartzose schists. With lenticular quartz seams. Rhodes, J. [SH 565 725]
A01502 Summit of Ynys-gaint. Looking NE. Summit of Ynys-gaint. Looking NE. Seams of venous quartz in chloritic siliceous schist. Rhodes, J. [SH 565 725]
A01503 Ynys-fach. Looking E. Ynys-fach. Looking E. Chloritic schists, very siliceous at top. Menai Strait with Carboniferous escarpment behind. Rhodes, J.
A01504 Cliff, E. of Church Island, Llandisilio. Looking E. Cliff, E. of Church Island, Llandisilio. Looking E. Siliceous chloritic schist, resting upon chlorite schist. Rhodes, J.
A01505 General view across Menai Straits, from the Column, Llanfair. Looking SE. General view across Menai Straits, from the Column, Llanfair. Looking SE. Carnedd Lllewelyn (3482 ft) and other mountains, with the landward portion of the Menaian Platform (300 ft.). Rhodes, J. [SH 505 665]
A01506 General view across Menai Straits, from the Column, Llanfair. Looking SW. General view across Menai Straits, from the Column, Llanfair. Looking SW. The Middle Reach of the Menai Strait. Yr Eifl (1887 ft.) in the distance to the right. Rhodes, J. [SH 505 665]
A01507 General view across Anglesey towards Mynydd Llwydiarth, from the Column, Llanfair. Looking N. General view across Anglesey towards Mynydd Llwydiarth, from the Column, Llanfair. Looking N. The Menaian Platform (about 300 ft.) with distant Monadnock of Mynydd Llwydiarth (about 120 ft.). Rhodes, J. [SH 505 665]
A01508 Menai Straits from Port Dinorwic. Looking N. Menai Straits from Port Dinorwic. Looking N. Middle Reach of the Menai Strait. Rhodes, J. [SH 525 685]
A01509 Menai Straits from Port Dinorwic. Looking W. Menai Straits from Port Dinorwic. Looking W. Western Reach of the Menai Strait. Rhodes, J. [SH 525 685]
A01513 Parciau, about 100 yd. N. of Camp. Looking SE. Parciau, about 100 yd. N. of Camp. Looking SE. Tabular outlier of Carboniferous Limestone (7 feet high). Rhodes, J. [SH 495 845]
A01514 1/2 m. S. of Marian Glas. Looking NW. 1/2 m. S. of Marian Glas. Looking NW. Tabular outlier of Carboniferous Limestone (8 to 10 feet high). Rhodes, J. [SH 505 845]
A01517 Newborough Warren. Looking NE. Newborough Warren. Looking NE. Folded sediments associated with pillowy lavas. Blown sand among the rocks. Owen, T. [SH 405 635]
A01711 Cliff near Llanbadrig Ch. Looking NE. Cliff near Llanbadrig Ch. Looking NE. Shearing of limestone among phyllites. Ogo Gynfor (Menain and Ordovician rocks) in distance. Rhodes, J. [SH 375 945]
A01712 Coast SE of Traeth-yr-Ora. Looking ESE. Coast SE of Traeth-yr-Ora. Looking ESE. Great Limestone in Old Red Series, passing under red cornstones. Rhodes, J. [SH 495 885]
A01713 Coast SE of Traeth-yr-Ora. Looking ENE. Coast SE of Traeth-yr-Ora. Looking ENE. Growth of cornstones. Vertical tubular form of nodules below hammer. (Detail of the highest beds of No. A1712.) Rhodes, J. [SH 495 885]
A01714 Newborough. Looking NE. Newborough. Looking NE. Pillow lavas. Owen, T. [SH 425 665]
A01715 Newborough. Newborough. Sand-hills. Desert scenery: great drifts of sand around bosses of pillowy lava. (Bosses 40 to 50 feet high.) Owen, T. [SH 425 665]
A01718 Newborough. Newborough. Pillow lavas. (Small pillows with jaspers.) Owen, T. [SH 425 665]
A01719 Newborough. Newborough. Pillow lavas. (Smallest pillows.) Owen, T. [SH 425 665]
A01720 [Newborough?] [Newborough?] Pillows beginning to show deformation. Owen, T. [SH 425 665]
A01721 Wylfa Head, NE of Perth Wnel. Looking NE. Wylfa Head, NE of Perth Wnel. Looking NE. Autoclastic melange. Great blocks of quartzite in rudely schistose matrix, full of small blocks of limestone, schist, etc. Rhodes, J. [SH 355 945]
A01722 Holyhead breakwater. Holyhead breakwater. Blocks moved by sea. Spencer (No initials) [SH 235 835]
A01723 Holyhead breakwater. Holyhead breakwater. Blocks moved by sea. Spencer (No initials) [SH 235 835]
A01724 Holyhead breakwater. Holyhead breakwater. Blocks moved by sea. Spencer (No initials) [SH 235 835]
A01725 Holyhead breakwater. Holyhead breakwater. Blocks moved by sea. Spencer (No initials) [SH 235 835]
A01726 Holyhead breakwater. Holyhead breakwater. Blocks moved by sea. Spencer (No initials) [SH 235 835]
A01727 Holyhead breakwater. Holyhead breakwater. Blocks moved by sea. Spencer (No initials) [SH 235 835]
A01728 Holyhead Quartzite Quarry. Holyhead Quartzite Quarry. Holyhead Quartzite Quarry. Spencer (No initials) [SH 225 835]
A01729 Holyhead Quartzite Quarry. Holyhead Quartzite Quarry. Holyhead Quartzite Quarry. Spencer (No initials) [SH 225 835]
A01730 Holyhead Quartzite Quarry. Holyhead Quartzite Quarry. Holyhead Quartzite Quarry. Spencer (No initials) [SH 225 835]
A01731 Llangwyfan Church. Looking S. Llangwyfan Church. Looking S. Llangwyfan Church on islet of boulder clay. Unknown [SH 335 705]
A11870 Wylfa Head, NW of Cemaes Bay. Wylfa Head, NW of Cemaes Bay. Autoclastic melange. Great blocks of quartzite in a rudely schistose matrix, full of small blocks of limestone, schist etc. Binns, P. [SH 355 945]
A11871 Wylfa Head, NW of Cemaes Bay. Wylfa Head, NW of Cemaes Bay. Autoclastic melange. Great blocks of quartzite in a rudely schistose matrix, full of small blocks of limestone, schist etc. Binns, P. [SH 355 945]
A11877 Newborough Warren, SW Anglesey. Newborough Warren, SW Anglesey. Pillow-lavas. Spilitic pillow-lavas of Precambrian age. Binns, P. [SH 405 635]
A01224 Cove S. of Porth-y-Wig, Carmel Head. Looking N. by W. Cove S. of Porth-y-Wig, Carmel Head. Looking N. by W. Permian Middle marl. Shows marl with beds of soft, very marly sandstone. The whole resembles a section of Keuper Waterstones. Rhodes, J. [SH 295 925]
A11879 Roadside quarry, 2 1/2 m. W. of Newtown. Roadside quarry, 2 1/2 m. W. of Newtown. Flute casts. Flute casts on a sole plane of Llandovery siltstones and sandstones. Pulsford, J.M.
A12452 South Stack. South Stack. Folded schists of the Mona Complex. These Precambrian rocks exhibit corrugation in the softer beds and vertical foliation in the harder ones. Pulsford, J.M. [SH 204 823]
A12578 500 m. WSW of Port Dafarch, Holy Isle. 500 m. WSW of Port Dafarch, Holy Isle. Folded schists of the Mona Complex. Pulsford, J.M. [SH 227 796]