Sample No.: RKPA80205

Location: Reckling Peak

Field No.: 1090

Weight (gms): 53.8.

Meteorite Type: H3 Chondrite

Physical Description: Roberta Score

Exterior weathering did not obliterate the clastic nature of this unequilibrated ordinary chondrite. Numerous chondrules can be seen on the two fracture surfaces while dull brownish-black fusion crust covers the remainder of the meteorite. Several irregular shaped, white clasts as large as 0.5 cm were revealed when this stone was chipped, as were numerous other inclusions in the medium to dark gray matrix. The 1 mm thick weathering rind showed that this meteorite is only moderately weathered. Dimensions: 4 x 2.5 x 3 cm

Petrographic Description: Brian Mason

The section shows a closely packed mass of chondrules (0.2 - 2.4 mm diameter), chondrule fragments, and irregular crystalline aggregates, with interstitial nickel-iron and troilite and small amount of dark fine-grained matrix. A considerable variety of chondrules is present; many are granular to porphyritic olivine with transparent to turbid intergranular glass; others consist of granular polysynthetically twinned clinopyroxene with or without olivine, fine-grained pyroxene, or barred olivine. Minor brown limonitic staining is present throughout the section. Microprobe analyses show olivine ranging in composition from Fa17 to Fa20, with a mean of Fa18; the pyroxene is low-calcium (CaO 0.1-0.2%) clinobronzite, ranging in composition from Fs5 to Fs13, with a mean of Fs8. This range of composition, together with the presence of glass, indicates type 3, and the composition of the olivine and considerable content of nickel-iron suggests H group; the meteorite is therefore tentatively classified as an H3 chondrite.