- Usage in publication:
-
- Tufts Quartzite Member*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- New England province
Summary:
Tufts Quartzite Member is included in Cambridge Argillite. Age is Proterozoic Z and possibly Early Cambrian. Report includes geologic maps and correlation charts. [Although not stated, this report effectively revises age of Tufts from Devonian or Carboniferous of Billings (1929) to Proterozoic Z and Early Cambrian(?). Because this is the first detected published reference to Tufts since 1932, this report effectively changes assignment of Tufts from Cambridge Slate of previous workers to Cambridge Argillite. Tufts was not shown on MA State bedrock map by Zen and others (1983), but this report is intended as an explanation of and (or) revision to the State map.]
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 ([ ]).