|Latitude & Longitude (WGS84):||32° 57' North , 10° 25' East|
|Latitude & Longitude (decimal):||32.95000,10.41667|
|Other regions containing this locality:||Sahara Desert, North Africa|
|Locality type:||Meteorite Fall Location|
|Meteorite Class:||Diogenite meteorite|
|Meteoritical Society Class:||Diogenite|
|Metbull:||View entry in Meteoritical Bulletin Database|
|Köppen climate type:||BWh : Hot deserts climate|
Fell June 27, 1931. Total mass 12 kg.
A large number of very small fragments fell over a radius of 500 m. Most Diogenites and all 11 Diogenite falls are pyroxenites compositionally dominated by orthopyroxene (~90 vol%), usually accompanied by plus minor amounts of various silicates and opaques. Unlike most other diogenites, however, Tatahouine's dominant pyroxene is composed mostly of numerous large single, usually seemingly unfragmented crystals of orthopyroxene. Closer inspection reveals, however, that many crystals have been partially deformed by shock and then subsequently reequilibrated and annealed. The Tatathouine's mineral assemblage is composed of very ancient material (~4.5 billion years). However, a moderately 'young' ~4.4 billion years Rb-Sr age suggests that the formation epoch itself was accompanied by almost simultaneous intense shock event(s) which would have interrupted any well defined simple formational epoch.
Tatahouine has also attracted some attention due to the detection of calcite and carbonate weathering products in samples recovered six decades after the fall. Some of the minerals may be biogenic. All this suggests that a 'well preserved' meteorite in a hot, dry dessert is not as impervious to alteration as first impressions might suggest.
6 valid minerals.
Meteorite/Rock Types Recorded
Select Rock List TypeAlphabetical List Tree Diagram
Entries shown in red are rocks recorded for this region.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
66 - 100.5 Ma
|Mesozoic sedimentary rocks|
Age: Late Cretaceous (66 - 100.5 Ma)
Lithology: Sedimentary rocks
Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. 
145 - 163.5 Ma
|Late Jurassic undifferentiated|
Age: Jurassic (145 - 163.5 Ma)
Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. 
|Jurassic - Triassic|
145 - 252.17 Ma