Bold typeface denotes a basal boundary stratotype for the global standard stratigraphy.
|
Llandovery |
Wenlock |
Ludlow |
Přídolí |
Midland Valley |
Gutterford Burn
Birk Knowes
Roughneck Quarry
Blair Farm
Penwhapple Burn
Woodland Point |
Lyne water and Lynslie Burn
Ree Burn–Glenbuck Loch Knockgardner |
|
|
Southern Uplands |
Old Cambus Quarry
Thornylee Quarry
Grieston Quarry
Dob's Linn |
Balmae Coast
Meikle Ross |
|
|
Lake District Basin |
Brow Gill Beck
Skelghyll Beck
Spengill
Yewdale Beck |
Brathay Quarries
River Rawthey
Torver–Ashgill
Arcow Quarry |
Tebay Cuttings
Benson Knott
Hills Quarry |
The Helm |
Welsh Basin |
Meifod
Craigyfulfran
Rheidol Gorge
Caban Côch
Aberarth-Morfa |
Penstrowed Quarry
Ty Mawr |
Ty'n-y-Ffordd Quarry
Clogau Quarry
Dinas Brân |
|
Welsh Basin
Margin |
Banwy River
Buttington Brickworks
Cwm Clyd Quarry
Scrâch Track
Trefawr Track
Cwm-Coed-Aeron
Coed Glyn Moch Track
Fron Road
Cilgwyn-Ydw Valley
Gasworks Lane
Marloes |
Trewern Brook Buffington Brickworks Banwy River Trecoed–Castle Crab Dulas Brook Coed-mawr
Pen-cerig
River Irfon
Sawdde Gorge Wernbongam Marloes
Freshwater East (south) |
Beacon Hill
Meeting House Quarry
Mithil Brook and Cwm Blithus
Sawdde Gorge |
Lower Wallop Quarry
Capel Horeb Quarry
Little Castle Head
Albion Sands and Gateholm Island |
Midland Platform |
Hope Quarry and Hope Brook
Hughley Brook
Hillend Farm
Wistanstow Gullet Quarry
Damery Bridge
Cullimore's Quarry |
Buildwas River Section
Lincoln Hill
Daw End Railway Cutting
Farley Road Cutting
Whitwell Coppice
Hay Head Quarries
Hughley Brook
Easthope-Harley Hill
Longville-Stanway Road Section
Wren's Nest
Eaton Track
Burrington
Dolyhir Quarries
Little Hill
Scutterdine Quarry
Linton Quarry
Hobbs Quarry
Cwm-Ton Area
Cilwrgi Quarry
Brinkmarsh Quarry
Buckover Road Cutting
Rumney River
Rumney Quarry
Pen-y-Lan Quarry
Moons Hill Quarry |
Turner's Hill
Upper Milliehope
View Edge
Mocktree Quarries
The Whiteliffe
Church Hill Quarry
Wigmore Road
Deepwood
Mary Knoll Valley
Pitch Coppice
Bow Bridge
Burrington Farm Stream Section
Sunnyhill, Mary Knoll Valley
Goggin Road
Deer Park Road
Elton Lane
Aymestrey Quarries
Woodbury Quarry
Perton Road and Quarry
Gurney's Quarry
Linton Quarry
Longhope Hill
Wood Green
Tites Point
Brook House |
Brewin's Canal Ludford Lane and Ludford Corner |
Bed no. |
Lithology |
Thickness (m) |
(18) |
Hard yellow current-bedded, fine-grained calcareous sandstone, weathering to a brown laminated rottenstone; contains abundant crinoid ossicles. |
0.45 |
(17) |
Silty mudstone with some silty sandstone bands; mainly green below and red and green above. |
1.21 |
(16) |
Purplish-red shaley mudstone, with occasional bands of hard, green, fine-grained sandstone and a thin layer of green clay at the base. |
1.87 |
(15) |
Banded green and purplish-red silty mudstone, with some hard sandy siltstone bands. |
2.59 |
(14) |
Banded green and purplish-red silty mudstone, with occasional bands of hard, fine-grained sandstone, and a few pale green clay partings. |
1.67 |
(13) |
Green siltstone, with some sandier bands showing fine current bedding and containing rounded masses with curved bedding. |
1.21 |
(12) |
Brown sandy siltstone with some curved bedding; abundant fossils. |
0.91 |
(11) |
Banded green and purplish-brown silty mudstone. |
0.60 |
(10) |
Yellowish-green siltstone, with bands of harder siltstone. Bands of yellowish-brown, fine-grained calcareous siltstone up to 30 cm thick, sometimes highly fossiliferous, most abundant in middle and upper part. Some reddish-brown and purplish streaks towards base and top. |
5.48 |
(9) |
Purplish-red mudstone and silty mudstone, with layers of slightly harder siltstone and two 10 cm bands of fine-grained sandstone. |
3.04 |
(8) |
Banded purplish-red and drab green mudstone and sandy mudstone with a band |
|
|
of green argillaceous sandstone, 17 cm thick at base. |
1.37 |
(7) |
Purplish-red mudstone, with green streaks, and occasional bands of green mudstone and sandy mudstone up to 30 cm thick. Abundant fossils in bed of purple mudstone apparently about 1.8 m above base. |
10.05 |
(6) |
Hard, purple and purplish-grey argillaceous and silty limestone, occurring in lumpy, irregular beds with clay partings. The highest 60 cm is most massive and regularly bedded. Drusy cavities, up to 5 cm across, contain small crystals of white and pink celestine. About 60 cm above base is band of purplish-blue clayey mudstone 23 cm thick. |
3.66 |
(5) |
Purple and purplish-red mudstone with occasional calcareous nodules; in the lower part a few seams of nodular, lumpy limestone up to 23 cm thick. |
2.74 |
(4) |
Purplish-red mudstone, slightly calcareous towards the base, with green limestone and mudstone band, 7 cm thick, at base. |
3.95 |
(3) |
Purplish-red mudstone with occasional thin green and purplish-blue bands. Nodular lumps of purple limestone, up to about 10 cm thick, in lower part. |
2.42 |
(2) |
Purplish-red mudstone with an occasional calcareous nodule in upper part, and with occasional thin green and purplish-blue bands and streaks. |
7.91 |
(1) |
Soft purplish-red mudstone with occasional very thin green partings. |
4.50 |
Unit |
Lithology/fossils |
Thickness (m) |
11. |
Top andesite. |
|
10. |
Agglomerate, contains well-rounded boulders up to 1 m in matrix of tuff. |
18 |
9. |
Upper andesites, basal 2 m flow has reddened top, though possibly also has pillowing, followed by massive lava. |
70 |
8. |
Tuff and bedded agglomerate, include red and locally blue-black mudstones, with angular and some rounded boulders up to 23 cm in the agglomerates. |
20–29 |
7. |
Main andesites, abruptly overly unit 6, top reddened and eroded below unit 8. |
90–135 |
6. |
Tuffs with red and green mudstones, finely interbedded, some tuffs with graded bedding and evidence of cross-bedding. |
18 |
5. |
Andesites. |
50 |
4. |
Tuffs and sandy tuffs, with fragments up to 2.5 cm, showing graded bedding, together with red and green mudstones, locally fossiliferous. Shelly fauna comprises mainly brachiopods, e.g. Craniops sp., Salopina conservatrix, 'Camarotoechia' tripartita, 'Camarotoechia' aff. llandoveriana, Rhynchotreta cuneata and Sphaerirhynchia davidsoni. Also remains of trilobites, bivalves, gastropods and ostracods (see also Reynolds, 1907; Woodward et al., 1909). |
105–135 |
3. |
Andesites, no surface exposure, possibly absent in eastern part of inlier. |
30 |
2. |
Tuffs, fine-grained, no surface exposure, possibly absent in eastern part of inlier. |
34–60 |
1. |
Shales and siltstones, with brachiopod-dominated shelly fauna, including Salopina conservatrix, 'Camarotoechia' tripartita, 'Camarotoechia' llandoveriana, Eocoelia angelini, Eoplectodonta duvalii, Coolinia applanata, Resserella canalis, Atrypa reticularis, ?Isorthis clivosa, Eospirifer radiatus and Protochonetes sp.. Trilobite, ostracod, bivalve, coral and Tentaculites remains also occur in these Wenlock Shale sediments (see also Reynolds, 1907; Bassett, 1974a). |
95+ |