- Usage in publication:
-
- Bloomington Lake Member
- Modifications:
-
- First used
- Overview
- Dominant lithology:
-
- Dolostone
- AAPG geologic province:
-
- Wasatch uplift
- Great Basin province
Summary:
First published use as upper member of Fish Haven Dolostone (redescribed) in western UT and southeastern ID, Great Basin province and Wasatch uplift. Informally named in Ph.D thesis by Keller (1963). Type section is at Bloomington Lake [for which unit probably named, Bear Lake Co?], ID. Measured section in Tony Grove Lake area in Bear River Range, northeastern Cache Co, UT and in Lakeside Mountains area, northeastern Tooele Co, UT (here Deep Lakes (first used) and Bloomington Lake Members are undifferentiated). Consists of dark-gray to medium-gray dolostone; weathers medium gray to light gray; some parts laminated ranging from microcrystalline to very finely crystalline; medium to very thick bedded. Average thickness is 270 ft. Overlies Deep Lakes Member (first used) of Fish Haven; underlies Tony Grove Lake Member (new) of Laketown Dolostone (redescribed). Age in north-central UT probably late Late Ordovician based on fossil corals. [Authors state in several places that unit was informally named by Keller (1963). Though authors refer to unit formally, they do not state their intention to formalize it.]
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Bloomington Lake Member
- Modifications:
-
- Revised
- AAPG geologic province:
-
- Great Basin province
Summary:
Reexamination of Lakeside Mountains section of Budge and Sheehan (1980) resulted in revision of contact between Fish Haven and overlying Laketown Dolomites. Lakeside Mountains section is located near Delle, UT, in NE1/4 SE1/4 sec 32, T2N, R8W, Tooele Co, Great Basin province. Units 16-18 of Budge and Sheehan reassigned from Tony Grove Lake Member of Laketown to Bloomington Lake Member of Fish Haven. Revised thickness of unit is 73.4 m. Basis of reassignment is 1) lithology of upper part of unit 18 is similar to upper part of Bloomington Lake at type section in Bear River Range, ID, and 2) unit 19 contains Silurian brachiopod VIRGIANA UTAHENSIS which is common in Tony Grove Lake. Disconformably overlies Bloomington Lake Member of Fish Haven; underlies High Lake Member of Laketown. Stratigraphic chart. Late Ordovician (Cincinnatian and Richmondian) age.
Source: GNU records (USGS DDS-6; Denver 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 ([ ]).