Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Pleasanton, Alameda County, California, USAi
Regional Level Types
PleasantonCity
Alameda CountyCounty
CaliforniaState
USACountry

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PhotosMapsSearch
Neighbouring regions:
Hayward, Alameda County, California, USA
Type:
City
Largest Settlements:
PlacePopulation
Pleasanton79,510 (2017)
Mindat Locality ID:
210706
Long-form identifier:
mindat:1:2:210706:9
GUID (UUID V4):
0


Pleasanton is a city.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

1 valid mineral.

Rock Types Recorded


Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
ⓘHydromagnesite5.DA.05Mg5(CO3)4(OH)2 · 4H2O

List of minerals for each chemical element

HHydrogen
Hⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
CCarbon
Cⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
OOxygen
Oⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
MgMagnesium
Mgⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O

Fossils

There are 1 fossil locality from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences1
Youngest Fossil Listed13.6 Ma (Miocene)
Oldest Fossil Listed16.0 Ma (Miocene)
Stratigraphic Units
UnitNo. OccurrencesAge
Briones115.97 - 11.608 Ma (Miocene)
Fossils from RegionClick here to show the list.
Accepted NameHierarchy Age
Desmostylus hesperus
species		Animalia : Chordata : Mammalia : Desmostylidae : Desmostylus : Desmostylus hesperus15.97 - 13.6 Ma
Miocene
Fossil LocalitiesClick to show 1 fossil locality

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Pleasanton,_California
Wikidata ID:Q747444
GeoNames ID:5383777

Localities in this Region

USA

Other Regions, Features and Areas that Intersect

North AmericaContinent
North America 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

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 221
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