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Met Name

Met Type

Thin Sections

2.03 grams. 74 x 34 x 1 mm.   CO3

TKW 1900 grams. Fall not observed. Found May 2001.

From the MetBul:

Petrography: (M. Kiriishi and K. Tomeoka, UKobe) Two different lithologies separated by a sharp boundary; lithology A is dark gray, lithology B is light gray. Both lithologies contain well defined chondrules set in a fine-grained matrix.

 

John writes:

This extraordinary specimen clearly displays two very distinct and different types of lithologies separated by a sharp boundary. A petrographic and mineralogical study indicates that both lithologies can be classified as a carbonaceous chondrite (CO3) containing small, but well-defined chondrules set in a fine-grained matrix. One lithology appears dark gray and the other light gray. We refer to these two areas as lithology A (dark gray) and lithology B (light gray), respectively. These differences can be explained by that lithology B has gone through a higher degree of thermal metamorphism than lithology A, resulting in differences in iron and olivine percentages in the chondrules and matrixes. These two lithologies probably represent rocks have been thermally metamorphosed at different locations within a single CO parent asteroid body and later mixed to form the present combined rock during a brecciation process.

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