SUPPORT US. If is important to you, click here to donate to our Fall 2019 fundraiser!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Clark Mountain thrust complex, Clark Mountain District (Clark District), Clark Mts (Clark Mountain Range), San Bernardino Co., California, USA

This page is currently not sponsored. Click here to sponsor this page.
Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 35° North , 115° West (est.)
Margin of Error:~13km

The Clark Mountain thrust complex is located at the intersection of the Mesozoic magmatic arc and the east Sierran and Sevier thrust belts. New U-Pb zircon ages for granitic rocks establish the timing of deformation within the thrust complex. The Pachalka thrust, structurally the highest fault in the complex, carries plutonic rocks eastward above Cambrian rocks. Hanging-wall and footwall rocks are mylonitic near the thrust. Hanging-wall plutonic rocks, previously considered Precambrian, are dated at 146 62 Ma and thus are Late Jurassic. Folds kinematically related to thrusting in footwall metasedimentary rocks are overturned eastward and cut by the Pachalka pluton dated at 142 ± 7 Ma. This brackets thrusting and related deformation in structurally high levels of the complex to be latest Jurassic. The Ivanpah and Striped Mountain plutons in the Ivanpah Mountains have been dated at 147 ± 7 Ma and 141 ± 11 Ma, respectively. These plutons are cut by the Keaney-Mollusk Mine and Morning Star Mine thrusts, which are in turn cut by the middle to late Cretaceous Teutonia batholith. These data indicate that these thrusts are early to middle Cretaceous in age. - Geological Society of America Bulletin

Mineral List

3 valid minerals.

The above list contains all mineral locality references listed on 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 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.


Adams, D.M. and Anderson, J.L. (1979) Occurrence of clintonite-monticellite-idocrase assemblages in contact skarns of the Clark Mountain Thrust, N.E. San Bernardino County, California; Abstracts with Program of the Geological Society of America: 11: 65.

Walker, J. Douglas, B.C. Burchfiel and Gregory A. Davis (1995), New age controls on initiation and timing of foreland belt thrusting in the Clark Mountains, southern California, Geological Society of America Bulletin: 107(6): 742-750.

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 13, 2019 09:11:51 Page generated: May 18, 2017 01:05:59
Go to top of page