- Usage in publication:
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- Trans-Hudson orogen
- Modifications:
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- Overview
- AAPG geologic province:
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- Midcontinent region
Summary:
Part of the Churchill province termed the Trans-Hudson orogen by Hoffman (1981). Is bounded on the west by Wyoming craton (Archean, more than 2.5 Ga), on the south by the Central Plains orogen (Early Proterozoic, about 1.65 Ga), and on the east by the Superior craton (Archean, more than 2.5 Ga). Occupies parts in MT, SD, ND, WY, CO, and NE, all in the Midcontinent region. Areal limits shown on tectonic map of Precambrian basement (fig. 3). Age shown to be about 1.85 Ga (Early Proterozoic), same as that for Penokean orogen.
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 ([ ]).