Laytonville Quarry (Longvale; Longvale Quarry), Laytonville, Coastal Range, Mendocino Co., California, USA
|Latitude & Longitude (WGS84):||39° 37' 5'' North , 123° 27' 47'' West|
|Latitude & Longitude (decimal):||39.61806,-123.46306|
|Köppen climate type:||Csb : Warm-summer Mediterranean climate|
A road metal quarry located in sec. 6, T20N, R14W (MD), about 5 miles S of Laytonville.
Specimens are commonly labeled as being from "Longvale" or "Longvale Quarry".
Mineralization is in blueschist metasediments of the Franciscan Formation.
32 valid minerals. 3 (TL) - type locality of 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
|Franciscan Complex, unit 1 (Coast Ranges)|
Age: Mesozoic (66 - 201.3 Ma)
Stratigraphic Name: Franciscan Complex; Dothan Formation; Honda Formation; San Luis Formation; Valentine Spring Formation
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.