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National Geologic Map Database
Geologic Unit: Shochary
Map showing publication footprint
  • Usage in publication:
    • Shochary sandstone member
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Willard, Bradford, and Cleaves, A.B., 1939, Ordovician-Silurian relations in Pennsylvania: Geological Society of America Bulletin, v. 50, no. 7, p. 1165-1198.


Summary:

Named the Shochary sandstone [member] of the Martinsburg formation for Shochary Ridge, Berks and Lehigh Cos., south-central and east-central PA. Unit is a massive sandstone in upper part of formation. Disconformably underlies the Tuscarora sandstone. Lithologically, stratigraphically, and faunally appears to correlate with the Fairview sandstone in south-central sections. The Shochary is of Late Ordovician (early Maysvillian) age.

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


Map showing publication footprint
  • Usage in publication:
    • Shochary sandstone
  • Modifications:
    • Revised
    • Redescribed
  • Dominant lithology:
    • Sandstone
    • Conglomerate
    • Limestone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Willard, Bradford, 1943, Ordovician clastic sedimentary rocks in Pennsylvania: Geological Society of America Bulletin, v. 54, no. 8, p. 1067-1122.


Summary:

Revised the Shochary to the Shochary sandstone of the Martinsburg group. Consists of medium- to fine-grained, well sorted, even-bedded, arkosic sandstone and minor conglomerate. Dark-gray to gray-brown sandstone occurs in beds up to 4 feet thick and is interbedded with limestone and quartz-pebble, limestone, and shale-chip conglomerate. Thickness is 750 feet at type locality. Overlies Dauphin shale of Martinsburg group.

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


Map showing publication footprint
  • Usage in publication:
    • Shochary Sandstone*
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Appalachian basin
Publication:

Wood, C.R., and MacLachlan, D.B., 1978, Geology and groundwater resources of northern Berks County, Pennsylvania: Pennsylvania Geological Survey Water Resource Report, 4th series, no. 44, 91 p., (incl. geologic map, scale 1:62,500)


Summary:

The Shochary Sandstone is removed from the Martinsburg Group; its relationship to the Martinsburg Formation is uncertain. Overlies unnamed shale and underlies the Spitzenberg Conglomerate. The age of the Shochary is changed to Middle and Late Ordovician based on possible correlation to Martinsburg 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 ([ ]).