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National Geologic Map Database
Geologic Unit: Bromley
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Map showing publication footprint
  • Usage in publication:
    • Bromley formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
    • Shale
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Bassler, R.S., 1906, A study of the James types of Ordovician and Silurian Bryozoa: U.S. National Museum Proceedings, v. 30, p. 1-66.


Summary:

Named for exposures near Bromley, KY, in the Ohio River Valley. Unit is "a series of drab to dark blue shales, outcropping along the Ohio River bank opposite Cincinnati. These shales are about 30 feet in thickness. Characteristic fossils are trilobite remains and a form of Dalmanella, both of which occur in relative abundance. Other fossils are rare." Underlying units not exposed; overlain by Point Pleasant formation.

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


Map showing publication footprint
  • Usage in publication:
    • Bromley Shale Member*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Cincinnati arch
Publication:

Luft, S.J., 1971, Geologic map of part of the Covington quadrangle, northern Kentucky: U.S. Geological Survey Geologic Quadrangle Map, GQ-955, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_2255.htm]


Summary:

Bromley Shale of Bassler (1906) reduced in rank to Bromley Shale Member of Point Pleasant Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Bromley Shale Bed*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Cincinnati arch
Publication:

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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"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 ([ ]).