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National Geologic Map Database
Geologic Unit: Finzel
Map showing publication footprint
  • Usage in publication:
    • Finzel tongue
  • Modifications:
    • First used
  • Dominant lithology:
    • Shale
    • Siltstone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Dennison, J.M., Beuthin, J.D., and Hasson, K.O., 1986, Latest Devonian-earliest Carboniferous marine transgressions central and southern Appalachians, USA, IN Bless, M.J., and Streel, M., eds., Late Devonian events around the Old Red Continent; field conference in Aachen (FRG), with excursions in the Ardenne (Belgium), the Rheinisches Schiefergebirge (FRG) and in Moravia (USSR): Annales de la Societe Geologique de Belgique, Aachen, Federal Republic of Germany, April 6-14, 1986, v. 109, no. 1, p. 123-129.


Summary:

Finzel tongue of Rockwell Formation consists dark shales and siltstones containing brackish-water fauna and green-gray SKOLITHOS-burrowed sandstones. Geologic map indicates unit extends into PA from type locality at Finzel, Garret Co., MD. Unit occurs at base of Rockwell and overlies Hampshire Formation. Interfingers Oswayo Formation. Age is Late Devonian. Probably deposited in coastal embayments during Cleveland sea-level rise.

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


Map showing publication footprint
  • Usage in publication:
    • Finzel Marine Tongue
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Brezinski, D.K., 1989, The Mississippian System in Maryland: Maryland Geological Survey Report of Investigations, no. 52, 75 p.


Summary:

Finzel Marine Tongue (Finzel tongue of Dennison, 1986) described at Finzel Road outcrop as 70 ft of interbedded gray-green, sandy, bioturbated, siltstones and shales and light-green, gray to variegated, argillaceous sandstones containing SKOLITHOS burrows at base of Rockwell Formation. Correlates with Oswayo Formation of northwestern PA based on spore studies by Kammer and Bjerstedt (1986) and Bjerstedt (1987). Overlies Hampshire Formation; underlies lower nonmarine facies of Rockwell Formation. Devonian-Mississippian boundary placed at top of unit.

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


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