Annual report ..[bulletins and circulars] . k of thecountry, which underliesthe soil (Fig. 15), some ofthem will be found to bequite different from instance, where thebed rock is shale or lime-stone, some of the pebbleswill no doubt be granite,sandstone, etc. If youcould explore, you wouldfind iust such rocks to thenorth of you, perhaps oneor two hundred milesaway in Canada ; or, ifyour home is south of the Adirondacks, you might trace them in those mountains. On some of these pebbles, especially the softer ones, such as limestone, you will find scratches, as if they had been ground for
Annual report ..[bulletins and circulars] . k of thecountry, which underliesthe soil (Fig. 15), some ofthem will be found to bequite different from instance, where thebed rock is shale or lime-stone, some of the pebbleswill no doubt be granite,sandstone, etc. If youcould explore, you wouldfind iust such rocks to thenorth of you, perhaps oneor two hundred milesaway in Canada ; or, ifyour home is south of the Adirondacks, you might trace them in those mountains. On some of these pebbles, especially the softer ones, such as limestone, you will find scratches, as if they had been ground forcibly together (Fig. 18). Looking now at the bed rock in some place from which the soil has been recently re-moved, you will find it also scratched and grooved (Fig. 19); and if you take the direction of these scratches with the compass, you will find that they extend in a general north and south direction, pointing in fact in ihe same direction from which the pebbles have come. 18.—A scratched limestone pebble takenfro)n a glacial 19. — The grooved bed rock scratched by themovement of the ice sheet over it. 42 All over northeastern North America and northwesternEurope the soil is of the same nature as that just our own country this kind of soil reaches down as far as theedge of the shaded area in the map (Fig. 20) and it will be noticedthat all of New York is within that area excepting the extremesouthwestern part near the southern end of Chautauqua lake. Not only is the soil peculiar within this district but there aremany small hills of clay or sand, or sometimes of both together(Figs. 26 and 27) They rise in hummocky form and oftenhave deep pits or kettle-shaped basins between, sometimes, whenthe soil is clayey enough to hold water, containing tiny hills extend in somewhat irregular ranges stretching acrosscountry from the east toward the west. The position of someof these ranges is indicated on the map (Fig. 20). For a long time people wo
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherithac, bookyear1899
