Campbellsville meteorite, Campbellsville, Taylor Co., Kentucky, USA

Octahedral Iron, IIIAB (Om)
Found 1929, 15.4 kg

A single corroded mass with a relatively intact Widmanstätten pattern was found in newly plowed land on Stoner Creek near Campbellsville. In addition to the expected kamacite and taenite of almost all meteoritic iron there is ample evidence of significant pre-terrestrial shock. Most of the kamacite is shock-hardened into the epsilon structure. Approximately 30 vol% of the meteorite consists of plessite, often martensitic (disordered microscopic kamacite-magnetite intergrowth). And minor, but conspicuous schreibersite is brecciated & often sheared. Accessory amounts of troilite and chromite are found as well. While corrosion is definitely present, Campbellsville appears to be a shock-hardened, mildly eroded, but otherwise quite normal member of the IIIAB Iron Meteorite Group consistent with its geochemical Fe-Ni metal abundances [8.61% Ni; 0.52% Co].

While IIIAB irons are the most abundant iron meteorite type (34% of all 877 classified irons as of October 2014), they are even a little more abundant in the Kentucky collection where they account for 43% of known Kentucky irons (6 of 14).

Mineral List

7 entries listed. 4 valid minerals.

References

External Links