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Durham Ranch Mine, Lobitos, San Mateo County, California, USAi
Regional Level Types
Durham Ranch MineMine
LobitosUnincorporated Community
San Mateo CountyCounty
CaliforniaState
USACountry

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Latitude & Longitude (WGS84):
37° 23' 57'' North , 122° 21' 2'' West
Latitude & Longitude (decimal):
37.39917,-122.35083
GeoHash:
G#: 9q8uzb6cf
GRN:
N25W71
Type:
Mine
Köppen climate type:
Csb : Warm-summer Mediterranean climate
Nearest Settlements:
PlacePopulationDistance
Woodside5,561 (2017)9.2km
Half Moon Bay12,657 (2017)9.9km
Emerald Lake Hills4,278 (2011)10.3km
Portola Valley4,594 (2017)10.3km
La Honda928 (2011)11.2km
Nearest Clubs:
Local clubs are the best way to get access to collecting localities
ClubLocationDistance
Sequoia Gem and Mineral SocietyRedwood City, California14km
Peninsula Gem & Geology Society, Inc.Los Altos, California21km
East Bay Mineral and Lapidary ClubHayward, California38km
Mineral & Gem Society of Castro ValleyHayward, California38km
Santa Clara Valley Gem & Mineral SocietySan Jose, California41km
Mindat Locality ID:
92058
Long-form identifier:
mindat:1:2:92058:5
GUID (UUID V4):
0


A former Au-Ag occurrence/mine located in the NW¼SE¼NW¼ sec. 24, T6S, R5W, MDM, 4.7 km (2.9 miles) ENE of Lobitos and 9.2 km (5.7 miles) WSW of Woodside, along the western slope of Durham Ridge (1.5 miles S of Bald Knob), on private land. MRDS database stated accuracy for this location is 1,000 meters.

Local rocks include Eocene marine rocks.

Analytical data results: Assayed well in Au & Ag.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


2 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘGold1.AA.05Au
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2

List of minerals for each chemical element

OOxygen
Oⓘ QuartzSiO2
SiSilicon
Siⓘ QuartzSiO2
AuGold
Auⓘ GoldAu

Other Databases

Link to USGS MRDS:10035140

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America Plate
Pacific PlateTectonic Plate
USA

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

U.S. Bureau of Mines Minerals Availability System/Mineral Industry Location System (MAS/MILS): file #0060810069.
Davis, Fenelon Francis (1955), Mines and mineral resources of San Mateo County, California: California Journal of Mines and Geology (Report 51): 51(4): 412.
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
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