Pennoyer Amethyst Mine (Rainbow lode claim), Red Feather Lakes, Larimer Co., Colorado, USA
|Latitude & Longitude (WGS84):||40° 48' North , 105° 35' West|
|Latitude & Longitude (decimal):||40.79999923706055, -105.58333587646484|
Ref.: Rocks & Min.: 59:11. An amethyst mine.
2 valid minerals.
This information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This data will improve over time as more accurate maps and data sets are added.
|Mesoproterozoic1000 - 1600 Ma||Mesoproterozoic plutonic rocks|
Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.
|Mesoproterozoic1000 - 1600 Ma||Granitic rocks of 1400-m.y. age group|
|Mesoproterozoic1000 - 1600 Ma||Mesoproterozoic plutonic: granite|
References for regional geology:
Data provided by Macrostrat.org
Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .
USGS compilers. State geologic map data. State Maps.
Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.