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Odessa craters, Odessa, Ector Co., Texas, USA

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Latitude & Longitude (WGS84): 31° 45' 21'' North , 102° 28' 42'' West
Latitude & Longitude (decimal): 31.75583,-102.47833
Köppen climate type:BSk : Cold semi-arid (steppe) climate


A group of five meteorite shallow craters located about ten miles southwest of Odessa. The largest is approximately 165 meters wide -- second largest crater in the US.

The craters were produced by the Odessa (iron) meteorite, a coarse octahedrite classified as a member of the main group of IAB meteorites (IAB-MG). Since 1922 1.6 tons of Fe-Ni rich meteoritical material (Ni ~7 wt%) has been recovered. The sulfides, silicates and several other familiar minerals listed here are, in the main, constituents of the original meteorite where they were often components of troilite and/or graphite inclusions. Several IAB iron meteorites, including the Odessa (iron) meteorite, contain 'silicate' inclusions which contain olivine, orthopyroxene, plagioclase, and other minor minerals. The pre-terrestrial Odessa silicates are usually very reduced and Mg-rich. Several minerals and mineral aggregates listed here (e.g., hibbingite, lawrencite, limonite) were produced by terrestrial weathering of the original iron meteorite. Pentlandite is somewhat more complicated as it is apparently both a primary, preterrestrial component and a weathering product.

The proper name for the meteorite associated with the Odessa Craters is 'Odessa (iron)' as the 'Odessa' meteorite refers to fragments of the earlier (1881) Grossliebenthal meteorite which fell in the Odessa Province of Ukraine.

Significant amounts of the Odessa meteorite are held in the nearby State Universities of Texas (Austin) and New Mexico (Albuquerque) and elsewhere. Masses with well-preserved interior masses, however, are still in short supply.


Mineral List

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

24 valid minerals.

Rock Types Recorded

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Regional Geology

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

Early Cretaceous
100.5 - 145 Ma



ID: 2879752
Fredericksburg Group

Age: Early Cretaceous (100.5 - 145 Ma)

Stratigraphic Name: Edwards Limstone; Comanche Peak Limestone; Keys Valley Marl; Cedar Park Limestone; Bee Cave Marl

Comments: Fredericksberg Group--Limestone,dolomite,chert, marl. Limestone nodular, aphanitic, marly, gray, yell, white, pink; dolomite, find grained, gray; chert, in thin layers and nodules; marl locally gypsiferous, gray. abundant Exogyra texana some beds made almost entirely of Gryphaea sp., exposed thickness 50 ft in Hobbs Sheet (1976). Edwards Limstone, limestone, dolostone, and chert 60-350 ft thick. Comanche Peak Limestone 80 ft thick. Keys Valley Marl, soft, white as much as 50 ft thick. Cedar Park Limestone similar to Comanche Peak Ls (fine to v. fine grained, fairly hard, nodular, lt. gray, burrowed). Bee Cave Marl soft, white Exogyra texana abdt, thickness 25-40 ft.

Lithology: Major:{limestone,dolostone,marl}, Minor:{chert}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License


Localities in this Region

USA

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References

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Beck, C. W. and La Paz, L. (1951), The Odessa, Texas, Siderite (ECN =+ 1025,318). Contributions of the Meteoritical Society, 5: 27–33
Bunch, T.E., Keil, K., and Olsen, E. (1970): Mineralogy and Petrology of Silicate Inclusions in Iron Meteorites. Contributions to Mineralogy and Petrology 25, 297-340.
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam, London: New York. 245 pages.
Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

External Links

http://www.lpi.usra.edu/meteor/metbull.php = Meteoritical Bulletin Database

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