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National Geologic Map Database
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  • Usage in publication:
    • Cresaptown iron sandstone
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Swartz, C.K., 1923, Correlation of the Silurian formations of Maryland with those of other areas, IN Swartz, C.K., and others, Silurian [deposits of Maryland]: Maryland Geological Survey Systematic Report, p. 183-232.


Summary:

An iron-rich sandstone or lean "iron ore," of deep-red color, lying about 175 ft above the base of Rose Hill formation in western MD here referred to as Cresaptown iron sandstone. Underlies upper shale beds of Rose Hill. Some of Cresaptown beds are distinctly oolitic. Interbedded with the iron sandstone are variable amounts of shale. Contains fossils. Thickness 30 ft at Pinto and 10 ft at Cumberland, Allegany Co. Age is Silurian.

Source: GNU records (USGS DDS-6; Reston GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Cresaptown iron sandstone member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Cloos, Ernst, 1951, The physical features of Washington County [Maryland]: Maryland Geological Survey County Report, no. 14, p. 41-43.


Summary:

Unit referred to as Cresaptown iron sandstone member of Clinton shale or formation.

Source: GNU records (USGS DDS-6; Reston GNULEX).


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).