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Geologic Unit: Chardon
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Map showing publication footprint
  • Usage in publication:
    • Chardon sandstone
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Prosser, C.S., 1912, The Devonian and Mississippian formations of northeastern Ohio: Ohio Division of Geological Survey Bulletin, 4th series, no. 15, 574 p.


Summary:

Pg. 219, 229. Chardon sandstone. Thin-bedded shaly sandstone, 7 feet 8 inches to 9 feet 8 inches thick, in middle of Orangeville formation in Lake and Geauga Counties, northeastern Ohio. Underlies Brecksville shale and separated from underlying Berea sandstone by 29 feet of shale forming lower part of Orangeville formation. [This shale is now (ca. 1936) called Sunbury shale.] Latter shale interval is twice or three times as thick as shale between Berea sandstone and Aurora sandstone of Cleveland region, hence correlation with Aurora is doubtful. [Age is Mississippian.]
Named from Chardon Twp., Geauga Co., northeastern OH.

Source: US geologic names lexicon (USGS Bull. 896, p. 401).


Map showing publication footprint
  • Usage in publication:
    • Chardon siltstone member
  • Modifications:
    • Redescribed
    • Adopted
  • Dominant lithology:
    • Siltstone
    • Shale
  • AAPG geologic province:
    • Appalachian basin
Publication:

de Witt, Wallace, Jr., 1951, Stratigraphy of the Berea sandstone and associated rocks in northeastern Ohio and northwestern Pennsylvania: Geological Society of America Bulletin, v. 62, no. 11, p. 1347-1370.


Summary:

Pg. 1363-1364; J.F. Pepper, Wallace de Witt, Jr., and D.F. Demarest, 1954, USGS Prof. Paper 259, p. 42. Chardon siltstone member of Orangeville shale. Renamed [and adopted by the USGS]. Consists of thin- to thick-bedded gray siltstones and intercalated silty shale. Thickness about 8 feet. Occurs in Orangeville about 30 feet above Berea sandstone. Lithologically similar to Aurora member; names Chardon and Aurora may have been applied to different parts of a single unit. Age is Mississippian.

Source: US geologic names lexicon (USGS Bull. 1200, p. 724).


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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