Appendix 2 Some published analyses of Manx rocks

Analyses from Dickson and Holland's paper:—on "An Examination of some Volcanic Rocks of the Isle of Man", in Proc. Liverpool Geol. Soc., vol. vi. (18S9), pp. 126–129.

Specimen' showing junction of microgranite dyke at Crosby with the slates.

"Analysis of Elvanite portion of specimen". "Sp. Gray. 2.72<ref>Mr. Hobson states that the sp. gray. of this rock is 2.62 (Quart. Journ. (eol. Soc., vol. xlvii., p. 439).</ref>

"Analysis of the slaty portion of the rock at the point of function

"Not enough of the specimen remained to enable a satisfactory estimation of the carbonaceous matter to be made. P₂O₅ was detected in this specimen, but was not estimated, as also S.

"Thinking it would be interesting to have a specimen of the unaltered slate rock examined chemically so as to compare it with the rock near the point of junction, a specimen was kindly sent by Dr. Tellet of Ramsey, from Sulby, a place about 5 miles from Crosby".

"Analysis of unaltered Silurian from near Sulby. "Sp. Grav. 2.79.

"Carbonaceous matter approximately 0.5 per cent.

"It seems remarkable that there should be 8 per cent. more silica in the unaltered than in the altered rock".<ref>As the specimens were from widely separated localities, the disparity commented on may only indicate that the Sulby rock was originally more sandy than the other.[G. W. L.]</ref>

"Specimen ['altered basalt'] from summit of Scarlet Stack. SD. Gray. 2.62<ref>Mr. B. Hobson re-determined the sp. grav. and found it to be 2.76. (Quart. Journ. Geol. Soc., vol. .civil., p. 441.)</ref>

"Specimen of gabbro from the most westerly quarry at Rockmount. "Sp. Gray. 2.26<ref>Sp. grav. corrected by Mr. B. Hobson to 2.76.</ref>

"Carboniferous shale from a deep boring. [Knock-e-Dooney] in the Isle of Man", by W. Maynard Hutchings (in "Clays, Shales and Slates"; Geol. Mag., July, 1896, dec. iv., vol. iii., p. 309).<ref>The specimen analysed by Mr. Hutchings was from a depth of 805 feet in the above boring.</ref>