Annual report . 15W ^ ySo 0 <rp?5s^ =?*ftq°SL£Jit y&o^ °s. 0000000 30 00 0 000 0 0 0 0 0 00 0 0 0 0 0 0( Bed rock Till Clays Sands Flood gravel Fig. 3 Diagrams showing successive stages in the formation of Round lake depression. Thefirst diagram shows the depression as formed prior to the glacial epoch; the second diagram showsthe conditions after the melting of the ice when glacial till had been deposited on the floor andslopes of the depression; the third diagram shows the conditions when Lake Albany was at itsheight, clays and sands having been deposited, filling the depression; the four
Annual report . 15W ^ ySo 0 <rp?5s^ =?*ftq°SL£Jit y&o^ °s. 0000000 30 00 0 000 0 0 0 0 0 00 0 0 0 0 0 0( Bed rock Till Clays Sands Flood gravel Fig. 3 Diagrams showing successive stages in the formation of Round lake depression. Thefirst diagram shows the depression as formed prior to the glacial epoch; the second diagram showsthe conditions after the melting of the ice when glacial till had been deposited on the floor andslopes of the depression; the third diagram shows the conditions when Lake Albany was at itsheight, clays and sands having been deposited, filling the depression; the fourth diagram showspresent conditions as resulting from erosion and the deposition of flood gravel. 24 NEW YORK STATE MUSEUM ECONOMIC VALUES OF THE LAKE ALBANY DEPOSITS Molding sands. Sands of the requisite qualities for use as mold-ing sands appear to be a widely distributed constituent of these lakedeposits. They are obtained at present in the localities of the follow-ing shipping stations: near South Schenectady, Carman (on XewYork Central & Hudson Rive
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
