Page:Quarterly Journal of the Geological Society of London, vol. 27.djvu/426

 Fig. 1. — Map of the Island of Eigg.

P. Pitchstone-porphyry coulee of the Scur. R. Outcrop of ancient river-gravel under pitchstone of Scur. P. Small veins of pitchstone. b. Dykes, veins, and intrusive sheets of basalt-rocks. The short black lines traversing the map in a N.W.-S.E. direction are basalt dykes. f. Intrusive quartziferous porphyry. D. Bedded basalt rocks with occasional tuffs. F. Bedded porphyrite.

4. Clay with Ammonites, Belemnites, &c.

3. Shales and Limestone bands with Cyprids, Cyclas, Ostrea, &c.

2. Thick white and yellow Sandstones with plants.

1. Shales and Limestone bands with Cyprids, Cyclas, Mytilus, and teeth and bones of Reptiles.

X X. Loch Beinn Tighe.

X. Loch a Bhealaich.

—>- General dip of the rocks.