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!
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
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 ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Trachyte from
Emuruangogolak Volcano, Samburu County, Kenya


Locality type:Volcano
Classification
Type:Trachyte
Age information
Maximum recorded age:0.9 ± 0.1 Ma
Minimum recorded age:0.014 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
10.9 ± 0.1 to 0.5 ± 0.1 MaPleistocene - K-Ar
20.04 to 0.014 MaPleistocene - Internal isochron U-Th age
Sample references:
1 -
Weaver, S. D. (1977). The Quaternary caldera volcano Emuruangogolak, Kenya Rift, and the petrology of a bimodal ferrobasalt-pantelleritic trachyte association. Bulletin Volcanologique, 40(4), 209-230. doi.org/10.1007/BF02597564
2 -
Black, Stuart, Macdonald, Ray, Barreiro, Barbara A., Dunkley, Peter N., Smith, Martin (1998) Open system alkaline magmatism in northern Kenya: evidence from U-series disequilibria and radiogenic isotopes. Contributions to Mineralogy and Petrology, 131 (4) 364-378 doi:10.1007/s004100050398
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Trachyte data
Locality Data:Click here to view Emuruangogolak Volcano, Samburu County, Kenya
Data Identifiers
Mindat Occurrence Record ID:1426150
Long-form Identifier:1:3:1426150:1
GUID (UUID V4):0
Nearest other occurrences of Trachyte
15.3km (9.5 miles) ⓘOliyamur Volcano, Turkana County, Kenya
16.6km (10.3 miles) ⓘKajyamamuk Volcano, Turkana County, Kenya
17.6km (10.9 miles) ⓘKanatim Volcano, Turkana County, Kenya
19.7km (12.2 miles) ⓘKapatagni Volcano, Turkana County, Kenya
26.5km (16.5 miles) ⓘKachila Volcano, Turkana County, Kenya
29.6km (18.4 miles) ⓘKafkandal Volcano, Turkana County, Kenya
29.9km (18.6 miles) ⓘNasaken Volcano, Turkana County, Kenya
39.6km (24.6 miles) ⓘLomi Volcano, Turkana County, Kenya
40.7km (25.3 miles) ⓘKowun Volcano, Turkana County, Kenya
43.3km (26.9 miles) ⓘRibkwo Volcano, Baringo County, Kenya
References
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 3, 2026 00:40:32
Go to top of page