. Travels in North America, in the years 1841-2; with geological observations on the United States, Canada, and Nova Scotia. AT CAPE BLOMIDO^Fig. 16. 145 Section of the Cliff and Beach at Cape Blomidon. a. a. Ledges of soft sandstone exposed at low water. b. Red marls with light greenish streaks, and layers of fibrous gypsum. c. Capping of trap. d. Talus of blocks and pebbles of trap, amygdaloid, greenstone, &c. mining of the perpendicular cliff forming this promon-tory, round which the powerful currents caused bythe tide sweep backwards and forwards with prodi-gious velocity, must satisfy eve
. Travels in North America, in the years 1841-2; with geological observations on the United States, Canada, and Nova Scotia. AT CAPE BLOMIDO^Fig. 16. 145 Section of the Cliff and Beach at Cape Blomidon. a. a. Ledges of soft sandstone exposed at low water. b. Red marls with light greenish streaks, and layers of fibrous gypsum. c. Capping of trap. d. Talus of blocks and pebbles of trap, amygdaloid, greenstone, &c. mining of the perpendicular cliff forming this promon-tory, round which the powerful currents caused bythe tide sweep backwards and forwards with prodi-gious velocity, must satisfy every geologist that thedenudation by which the ledge in question has beenexposed to view is of modern date. Whether therocks forming the cliff extended so far as the points«, 10, 50, or 100 years ago, I have no means of esti-mating ; but the exact date and rate of destruction Fig. 17. Recent furrows on ledge of sandstone at Cape Blomidon. are immaterial. On this recently formed ledge, I sawseveral straight furrows half an inch broad, some ofthem very nearly parallel, as a, h, fig. 17, others di-verging, as c, the direction of «, h, being N. 35° E. VOL. IL 14 146 :\T <;LAriAL flrrows. xxm. or corrosponding to that of the shore at tliis walking about a quarter of a mile, 1 found ano-ther set of similar furrows, having tlie same generaldirection within live degrees; and I made up mymind tliat if these grooves could not be referred tothe modern instrumentality of ice, it would throw nosmall doubt on the glacial hypothesis. When I askedmy guide, a peasant of the neighbourhood, whetherhe iiad ever seen much ice on the spot where westood, the heat was so excessive (for we were in thelatitude of the south of France, 45^ N.) that I seemedto be putting a strange question. He replied that inthe preceding winter of 1841 he had seen the ice, inspite
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