. Maryland geological survey . destroy the surface of the Wicomico formation. This has notbeen accomplished. It is, therefore, believed that an estuary existed dur-ing Talbot time and that the waves which beat along the shore of thisestuary kept the streams cut back at their mouths, and although a den-dritic type of drainage started to develop, it had apparently not pro-ceeded far because of the constant shortening of the river valleys. An-other argument against the flood plain hypothesis is that sufficient timewould have elapsed to have permitted the complete destruction of thescarp-line by s
. Maryland geological survey . destroy the surface of the Wicomico formation. This has notbeen accomplished. It is, therefore, believed that an estuary existed dur-ing Talbot time and that the waves which beat along the shore of thisestuary kept the streams cut back at their mouths, and although a den-dritic type of drainage started to develop, it had apparently not pro-ceeded far because of the constant shortening of the river valleys. An-other argument against the flood plain hypothesis is that sufficient timewould have elapsed to have permitted the complete destruction of thescarp-line by subaerial erosion. With the advance of the dendritic drain-age systems, the scarp-line would have blended with the terrace beneath. Typical marine Pleistocene terraces containing marine invertebrate fossilsare extensively developed on the coast of Greenland. They are described andillustrated by White & Schuchert, Bull. Geol. Soc. Araer., vol. ix, p. 348, 1898. MARYLAND GEOLOGICAL SURVEY. PLIOCENE AND PLEISTOCENE, PLATE Fig. I.—VIEW SHOWING recent filling of patuxent RIVER ABOVE LYONS CREEK, ANNE ARUNDEL COUNTY.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectpaleont, bookyear1901
