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Geologic Unit: Isle La Motte

Isle La Motte Limestone of Black River Group (VT,NY)

Ordovician, Middle

Geologic Province:
New England province

Areal Extent:

Type Locality:
Type section: In Hill quarry on east side of Isle La Motte in Lake Champlain, Grand Isle Co., VT (Kay, 1937).

Unit Name History:
Named Isle La Motte marble (Emmons, 1842). Redescribed as Isle La Motte limestone; Principal reference; Age modified (Kay, 1937). Revised; Age modified (Kay, 1958). Assigned to Black River group (Doll and others, 1961).

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"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
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Last modified: 15-Jan-2013