- Usage in publication:
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- Liberty Hall limestone
- Modifications:
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- Named
- Dominant lithology:
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- Limestone
- Shale
- AAPG geologic province:
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- Appalachian basin
Summary:
Named Liberty Hall limestone for old historic ruin that stood on this rock. Consists of a succession of rather evenly banded beds of fine-grained dark-blue limestone and darker, more argillaceous limestone that weathers shaly. Upward in the formation calcareous shale predominates and limestone beds are less frequent. Thickness is approximately 1000 feet. Unit contains Mohawkian fossils and therefore correlates with the Lexington limestone of J.L. Campbell (1879). The Liberty Hall overlies the Murat limestone.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Liberty Hall facies
- Modifications:
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- Revised
- AAPG geologic province:
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- Appalachian basin
Summary:
Revised to Liberty Hall facies of the Edinburg formation. Unit is the black limestone and black shale of the Edinburg. It is revised to a facies because beds exhibiting these lithologies do not everywhere fall within same precise stratigraphic limits. The Liberty Hall interfingers with the Lantz Mills facies which is proposed for the contrasting cobbly to nodular buff-weathering limestone. Thickness of Liberty Hall facies ranges from 275 feet at the Edinburg type section to 1200 feet south of Harrisonburg, VA.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Liberty Hall formation
- Modifications:
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- Revised
- AAPG geologic province:
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- Appalachian basin
Summary:
Revised to the Liberty Hall formation. Consists of black limestone and black calcareous shale up to 1200 feet thick. Includes the Fincastle conglomerate [member]. Unit is of Middle Ordovician age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Liberty Hall Member
- Modifications:
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- Revised
- AAPG geologic province:
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- Appalachian basin
Summary:
Revised to Liberty Hall Member of Edinburg Formation. Consists of black, fine-grained, thin-bedded limestone interbedded with black calcareous shale. Thickness varies.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Liberty Hall Member
- Modifications:
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- Overview
- AAPG geologic province:
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- Appalachian basin
Summary:
The Liberty Hall Member of the Edinburg Formation consists of medium-bedded, dark-gray to black limestone and is the middle member of the formation. The black shale that occurs in the type section is not present in the mapped area of this report.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Liberty Hall beds
- Modifications:
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- Revised
- AAPG geologic province:
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- Appalachian basin
Summary:
The Liberty Hall beds consist of black, fine-grained to aphanic, shaly limestone and black shale and interfingers with cobbly weathering argillaceous limestone of the Lantz Mills beds. Unit also contains several metabentonite beds.
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
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- Liberty Hall Formation*
- Modifications:
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- Overview
- AAPG geologic province:
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- Appalachian basin
Summary:
In cross section E-E', in the subsurface of Virginia near Harrisonburg, VA, the Liberty Hall Formation is equivalent to part of the Black River Group of WV. The Ward Cove Formation to the west becomes a tongue of the Liberty Hall to its east. Age is Middle Ordovician (Blackriveran).
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 ([ ]).