. Cecil county. Geology. 188 THE COASTAL PLAIN FORMATIONS OF CECIL COUNTY buried by the advance of that beach toward the land. Taking up the first class of deposits in more detail they are believed to have been formed in the following manner: During the erosion interval which immediately preceded the depo- sition of the Talbot formation many streams cut moderately deep channels in the land-surface which on the sinking of the region again were transformed into estuaries (Fig. 8). Across the mouths of the. Fig. 9. Diagram showing advancing Talbot shore-line and ponded stream. smaller of these dr
. Cecil county. Geology. 188 THE COASTAL PLAIN FORMATIONS OF CECIL COUNTY buried by the advance of that beach toward the land. Taking up the first class of deposits in more detail they are believed to have been formed in the following manner: During the erosion interval which immediately preceded the depo- sition of the Talbot formation many streams cut moderately deep channels in the land-surface which on the sinking of the region again were transformed into estuaries (Fig. 8). Across the mouths of the. Fig. 9. Diagram showing advancing Talbot shore-line and ponded stream. smaller of these drowned valleys the shore currents of the Talbot sea rapidly built bars and beaches which ponded the waters behind them and transformed them from brackish-water estuaries to fresh-water la- goons. These lagoons, however, were gradually changed into marshes and possibly to meadows by the inflow of detritus from the surround- ing region and on the new land-surface thus formed various kinds of vegetation took up their abode (Fig. 9). At first the beach-sands ad- vanced in the lagoon and filled up completely that portion of the sub- merged trough which lay immediately beneath them, but later, as the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Maryland Geological Survey; Shattuck, George Burbank, b. 1869; Bascom, F. (Florence), 1862-1945; Mathews, Edward Bennett, b. 1869; Dorsey, Clarence Wilbur, 1876-; Bonsteel, Jay Allan, 1873-; Fassig, Oliver Lanard, 1860-1936; Pressey, Henry Albert, 1873-; Bauer, L. A. (Louis Agricola), 1865-1932; Curran, Hugh M; Sudworth, George Bishop, 1862-1927; Geological Survey (U. S. ); United States. Bureau of Soils. Baltimore, The Johns Hopkins Press
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