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very few quartzite pebbles and practically destitute of fossils. the layers are of various thickness and succeed one another with something like regularity. The upper layers are frequently pale greenish or whitish where weathered, or a little more blue internally. They weather easily and fragments exposed to the air gradually slack up into loose sand. Here and there are clayey layers or lenticular masses which intercept the infiltrated iron and are often much hardened by it. The uppermost beds as a rule become somewhat more horizontal than those below and above them all, unconfomably to thin eroded edges is a layer (5 - 10 ft) of clayey soil full of pebbles of all sizes, up to cobbles, and also