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Geologic Unit: Pinnick
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Map showing publication footprint
  • Usage in publication:
    • Pinnick coal member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Coal
  • AAPG geologic province:
    • Illinois basin
Publication:

Gray, H.H., Jenkins, R.D., and Weidman, R.H., 1960, Geology of the Huron area, south-central Indiana: Indiana Geological Survey Bulletin, no. 20, 78 p.


Summary:

Pg. 26-27. Pinnick coal member of Mansfield formation. Important stratigraphic marker or key bed at top of lower unit of Mansfield. Average thickness about 1 foot. Coal named by D.W. Franklin (1939, unpub. thesis). Franklin's type section no longer exposed. Other good exposures noted. Age is Pennsylvanian.
Type section (of Franklin, 1939): mine on Pinnick property, in SE/4 SW/4 sec. 32, T. 2 N., R. 2 W., Orange Co., south-central IN.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3039).


Map showing publication footprint
  • Usage in publication:
    • Pinnick Coal Member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Illinois basin
Publication:

Shaver, R.H., Ault, C.H., Burger, A.M., Carr, D.D., Droste, J.B., Eggert, D.L., Gray, H.H., Harper, Denver, Hasenmueller, N.R., Hasenmueller, W.A., Horowitz, A.S., Hutchison, H.C., Keith, B.D., Keller, S.J., Patton, J.B., Rexroad, C.B., and Wier, C.E., 1986, Compendium of rock-unit stratigraphy in Indiana; a revision: Indiana Geological Survey Bulletin, no. 59, 203 p.


Summary:

Pg. 113, pls. Pinnick Coal Member of Mansfield Formation of Raccoon Creek Group. Shiny, blocky coal. Thickness 2.1 feet (0.6 m); generally less than 1 foot (0.3 m) thick. Roof is carbonaceous shale or massive medium-grained ferruginous sandstone; floor is underclay. Lies immediately above so-called Hindostan Whetstone Beds, about 50 to 185 feet (15 to 56 m) above base of Mansfield. Present in Orange, Dubois, and Martin Counties, south-central Indiana. Age is Early Pennsylvanian (Morrowan). Report includes map of type sections-localities-areas, correlation chart.

Source: Publication.


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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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