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Geologic Unit: Hero
Map showing publication footprint
  • Usage in publication:
    • Hero member
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • New England province
Publication:

Oxley, Phillip, and Kay, G.M., 1959, Ordovician Chazyan Series of Champlain Valley, New York and Vermont, and its reefs: American Association of Petroleum Geologists Bulletin, v. 43, no. 4, p. 817-853. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Named the Hero member of the Valcour formation in northwestern VT and northeastern NY for South Hero, Grand Isle Co., VT. Member makes up lower 101 feet of Valcour formation. Consists of dark-gray silt-laminated calcarenite argillicalcisiltite, massive-bedded but weathering to nodular shaly rubble. SOLENOPORO sp. abundant in top 3 feet, and present sparingly with sponge ZITTELELLA VARIANS (Billings) and a few STROMATOCERIUM masses below. At Chazy, NY, member has interbedded dolomite and calcilutite. Overlies the Crown Point formation and underlies the Beech member of the Valcour. The Hero is of Middle Ordovician (Chazyan) age.

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


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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