Log InRegister
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreOur ScienceMindat Newsletter [Free Download]Contact Us
Donate to MindatSponsor a PageCorporate SponsorshipSponsored Pages
Learning CenterWhat Is a Mineral?The Most Common Minerals on EarthInformation for EducatorsMindat ArticlesMindat Newsletter [Free Download]The ElementsThe Mineral Quiz
Search FormMinerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDMinerals by CountryAlphabetical Mineral IndexAlphabetical Locality SearchMineral Association SearchList of CountriesLocalities Near MePhoto SearchSearch ArticlesSearch GlossaryThe Rock H. Currier Digital LibraryMore Search Options
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
MineralsPetrologyFossilsMeteoritesGeologic Time
Mining CompaniesStatisticsMineral MuseumsClubs & OrganizationsMineral Shows & EventsDevice SettingsTime Machine
Read DiscussionsIdentification Request
Photo SearchPhoto GalleriesSearch by ColourPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Simien Mountains Volcanic Field, North Gondar Zone, Amhara Region, Ethiopiai
Regional Level Types
Simien Mountains Volcanic FieldVolcanic Field
North Gondar ZoneZone
Amhara RegionRegion
EthiopiaCountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
03838060017272414136598.jpg
Simien Mountains

Simien Mountains Volcanic Field, North Gondar Zone, Amhara Region, Ethiopia
03838060017272414136598.jpg
Simien Mountains

Simien Mountains Volcanic Field, North Gondar Zone, Amhara Region, Ethiopia
03838060017272414136598.jpg
Simien Mountains

Simien Mountains Volcanic Field, North Gondar Zone, Amhara Region, Ethiopia
Latitude & Longitude (WGS84):
13° 10' North , 38° 15' East
Latitude & Longitude (decimal):
13.16667,38.25000
GRN:
N09E27
Type:
Volcanic Field
Köppen climate type:
Cwb : Subtropical highland climate or temperate oceanic climate with dry winters
Mindat Locality ID:
406580
Long-form identifier:
mindat:1:2:406580:0
GUID (UUID V4):
0
Other/historical names associated with this locality:
Semien


Simien is a large volcanic cone rising from an extensive area of low-angle lavas to a max height of 4543 m. It is essentially basaltic, but there are comenditic dikes, which may be spherulitic, and larger rhyolitic intrusions.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


3 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 9 - Silicates
ⓘAegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
ⓘSanidine9.FA.30K(AlSi3O8)

List of minerals for each chemical element

OOxygen
Oⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Oⓘ QuartzSiO2
Oⓘ SanidineK(AlSi3O8)
NaSodium
Naⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
MgMagnesium
Mgⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
AlAluminium
Alⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Alⓘ SanidineK(AlSi3O8)
SiSilicon
Siⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Siⓘ QuartzSiO2
Siⓘ SanidineK(AlSi3O8)
KPotassium
Kⓘ SanidineK(AlSi3O8)
CaCalcium
Caⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
FeIron
Feⓘ Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6

Other Regions, Features and Areas containing this locality

AfricaContinent
African PlateTectonic Plate

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

Comucci, P. (1950). Le Vulcaniti del Lago Tana (Africa Orientale). Accademia nazionale dei Lincei.
Mohr, P. (1967). Review of the geology of the Simien Mountains. Bull. Geophys. Obs. Addis Ababa, 10, 79-93.
Woolley, A. R. (2001) Alkaline Rocks and Carbonatites of the World, Part 3: Africa - Alkaline Rocks and Carbonatites of the World. The Geological Society of London.p.74
Quick NavTopMineral ListRock TypesOther RegionsReferences
 
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: October 18, 2026 20:08:51 Page updated: December 2, 2025 11:39:39
Go to top of page