Sample No.: LEW87109

Location: Lewis Cliff

Dimensions (cm): 0.6x0.7x0.5

Field Number: 4217

Weight (g): 0.9

Meteorite Type: Iron

Macroscopic Description: Roy S. Clarke. Jr,

The specimen as received was a 0.86 g metal slug plus 0.03 g of debris, apparently mainly detached weathering products. Its shape was roughly equidimensional; and its surface was partially covered with various colored secondary oxides, with areas of tool marks from a previous examination, and with areas of metallic luster that may have developed by wind abrasion in Antarctica.

Polished Section Description: Roy S. Clarke. Jr.

A median section (0.174 g) was taken through the specimen, providing a polished section area of 0.25 cm² for examination, and leaving two small butts (0.352 g, 0.174 g). Two small areas of remnant fusion crust were observed at section edges, as well as intermittent patches of secondary oxides. The oxide areas are generally less the 50 µm thick, with only an occasional small patch approaching a thickness of 100 µm. Patches of heat-altered kamacite are present near edges. The bulk metal is kamacite of somewhat variable Ni content. A small number of microprobe analyses averaged 6.3% Ni. The kamacite is rich in subboundaries that are decorated with fine precipitates below the limit of optical resolution. Neumann bands are present, generally decorated with fine precipitates. One 0.2 mm cracked schreibersite was observed.