File:Tolchester folio Maryland Plate I.jpg

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Description
English: Plate I from Tolchester Folio, Maryland, which has the following caption:
IRREGULARITY IN BEDDING OF MOTTLED CLAY AND GRAVELLY SAND OF PATUXENT FORMATION IN CUT ON BALTIMORE & OHIO RAILROAD NEAR JOPPA, HARFORD COUNTY.

The text of the Folio states:

The only structural features of interest are the numerous examples of contemporaneous erosional unconformities and the steep dip of the laminae of the crossbedded sands. (See Pl. I.) Both of these features indicate deposition of the material by shifting shallow-water currents of considerable velocity.
Date
Source Tolchester folio, Maryland, Geologic Atlas of the United States, by B. L. Miller , E. B. Mathews, A. B. Bibbins, and H. P. Little, 2017
Author USGS

Licensing

Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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current09:48, 8 February 2023Thumbnail for version as of 09:48, 8 February 20232,078 × 1,203 (1.22 MB)imagescommonswiki>JstubyReverted to version as of 12:59, 7 February 2023 (UTC). The original is actually clearer although lower resolution.

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