- Usage in publication:
-
- Halifax chlorite schist
- Modifications:
-
- Original reference
- Dominant lithology:
-
- Schist
- AAPG geologic province:
-
- New England province
Summary:
Pg. 288-291 and map. Halifax chlorite schist. Characteristic mineral dark-green chlorite, which composes 75 to 85 percent of rock, the remaining 15 to 25 percent being quartz. Believed to be of sedimentary origin. Thickness of formation probably 2,000 to 3,000 feet and possibly more. Overlies Readsboro schist, with which it is interbedded at the contact. We did not become familiar with next formation above, which outcrops farther east, and do not know nature of the contact on that side. We have found variations from the true green chlorite schist in several places east of the line placed as our farthest boundary. Whether they should be separated as a new formation our studies are insufficient to determine. Is = Savoy schist of Massachusetts, which is assigned to Ordovician by Emerson.
Apparently named for development in Halifax Twp., Brattleboro and Wilmington quadrangles, Windham Co., southeastern VT.
Source: US geologic names lexicon (USGS Bull. 896, p. 897).
- Usage in publication:
-
- Halifax chlorite schist
- Modifications:
-
- Age modified
- AAPG geologic province:
-
- New England province
Summary:
Table opp. p. 288. Halifax chlorite schist. Assigned this formation to Upper Cambrian and = Bethel schist, but without discussion of the evidence.
Source: US geologic names lexicon (USGS Bull. 896, p. 897).
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 ([ ]).