|Latitude & Longitude (WGS84):||38° 50' 5'' North , 122° 24' 11'' West|
|Latitude & Longitude (decimal):||38.83472,-122.40306|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
A former Hg mine located in sec. 3, T11N, R5W, MDM, 5.6 km (3.5 miles) W of Knoxville (Napa County) and near Lower Lake.
Mineralization is hosted in serpentinite.
Local structures include local shear.
Production data are found in: U.S. Bureau of Mines file data.
7 valid minerals.
This geological map and associated 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 does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
|Cretaceous - Jurassic|
66 - 201.3 Ma
|Mesozoic tectonic rocks|
Age: Mesozoic (66 - 201.3 Ma)
Stratigraphic Name: Franciscan Complex
Comments: metamorphic protolith: mafic volcanics
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
|Late Jurassic - Middle Jurassic|
145 - 174.1 Ma
|Ultramafic rocks, chiefly Mesozoic, unit 3 (Coast Ranges and Western Klamath Mountains)|
Age: Jurassic (145 - 174.1 Ma)
Stratigraphic Name: Josephine Peridotite
Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052.