. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. "> 1 <'i^ V ' LAKE MARGINS.—BOOS AND PEATY SWAMPS. 85 I'lg. 8. Coverings of Diatomactne from Jiecent Freah-mater Depoaiia, Nova Scotia,— ^^*^^i^^0^ \ Lake Margins in Nova Scotia are of some geological interest, from the effects of ice-pressure wliicli they exhibit. The expansion of the thick icy slicet Avhich forms on the surfiice of
. The geology of Nova Scotia, New Brunswick, and Prince Edward Island, or, Acadian geology [microform]. Geology; Geology, Stratigraphic; Paleontology; Geology, Economic; Géologie; Géologie stratigraphique; Paléontologie; Géologie économique. "> 1 <'i^ V ' LAKE MARGINS.—BOOS AND PEATY SWAMPS. 85 I'lg. 8. Coverings of Diatomactne from Jiecent Freah-mater Depoaiia, Nova Scotia,— ^^*^^i^^0^ \ Lake Margins in Nova Scotia are of some geological interest, from the effects of ice-pressure wliicli they exhibit. The expansion of the thick icy slicet Avhich forms on the surfiice of our lakes in winter, and its drifting to and fro when loosene^ from the shores by the thaws of spring, heap up very remarkable ridges and embank- ments of stones, gravel, and earth. In low and inuddy shores, these actions of the ice, I believe principally the latter, push up long mounds, which look as if an attempt had been made to raise an artificial dike; and where the shores consist of small stones and gravel, still more regular structures are sometimes produced. Oc- casionally there are two mounds, one within the other, marking different levels of the water; and I have seen these mounds still remaining, in places where lakes and ponds had been long since filled up and converted into bogs. On rocky shores, large stones I pushed against the bank and packed together until they form i huge sloping Cyclopean walls, which testify not only by their mass, but by the manner in which they have been wedged together, to jtlic force that has been applied to them. This last appearance is as jwell seen in some of the upper lakes of the Shnbenacadie as in any lothers that I have examined. These modern effects of ice-pressure jwill serve to explain some of the phenomena of the drift or boulder [fonnation which overspreads the surface of the province. They are jalso curio js from tlie resemblance which they bear to glacier moraines, |fur which they might, in some cases, be easi
Size: 1969px × 1269px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., boo, bookcentury1800, booksubjectgeology, booksubjectpaleontology
