- Usage in publication:
-
- Windy Point granite*
- Modifications:
-
- First used
- Dominant lithology:
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- Granite
- AAPG geologic province:
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- Southern Rocky Mountain region
Summary:
First published use of name assigned to a granite that occurs in the western part of Manitou quad where it occupies the summit of Pikes Peak. Also occurs to southeast of Pikes Peak in seven bodies along ridge to Windy Point [source of name]. No type locality designated. These occurrences are in El Paso Co, CO in the Southern Rocky Mountain region. Does not extend into the Colorado Springs quad. Considered to be younger than Pikes Peak granite which it appears to have intruded. Is a holocrystalline, fine-grained, brownish-red granite. Has scattered feldspar crystals a few mm in diameter. The essential constituents are microcline, orthoclase, oligoclase, quartz, and biotite. Is deeply weathered. Breaks into angular masses and platy pieces. Distinguished from other granites in area by its extremely close grained texture. Feldspar constitutes more than a third of the rock. Geologic map; chemical analyses. Of pre-Cambrian age.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Windy Point Granite*
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Southern Rocky Mountain region
Summary:
Late aplitic to porphyritic rock in small bodies cutting Pikes Peak Granite. Listed with granitic rocks of circa 1,000 m.y. (Precambrian Y) age group. Occurs in Southern Rocky Mountain region.
Source: GNU records (USGS DDS-6; Denver GNULEX).
- Usage in publication:
-
- Windy Point Granite*
- Modifications:
-
- Areal extent
- Overview
- AAPG geologic province:
-
- Southern Rocky Mountain region
Summary:
One of youngest rocks of Pikes Peak batholith, Southern Rocky Mountain region, CO, but older than Mount Rosa Granite. Considered to be Middle Proterozoic age. Largest pluton (about 19 km long and 3 km wide) is in Rampart Range. Is a fine-grained porphyritic pink granite in irregular bodies that cut Pikes Peak Granite.
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 ([ ]).