Sample No.: RKPA78002

Location: Reckling Peak

Field No.: Reckling Peak #2

Weight (gms): 8433.0

Meteorite Type: H4 Chondrite

Physical Description:

This tabular shaped meteorite has 4 flat and 2 semi-rounded surfaces with sharp ridges. 0.5 mm thick black, polygonally fractured fusion crust covers the entire specimen except for areas along the ridges where it has been broken off. The areas void of fusion crust are greenish-brown in color and contain numerous inclusions. One fracture penetrates the interior of the meteorite. After drying for several days in the nitrogen cabinet, minute amounts of white deposit appeared along the polygonal fractures. The cut face reveals a weathering rind ~1-4 mm thick. Abundant metal blebs are obvious with most of the metal having oxidation halos around them. Several chondrules (~2 mm diameter) are present. Dimensions: 17 x 13.5 x 17 cm.

Petrographic Description: Arch Reid

Chondrules, ranging from 0.2 to 1.5 mm but mostly sub mm., are abundant and many are well-defined. Porphyritic chondrules, with equant euhedral olivines and with elongate skeletal olivines in turbid devitrified glass, are common. Fine-grained pyroxene-rich chondrules, including excentroradial pyroxene aggregates, are also common. Spherical chondrules have well-defined borders whereas irregular chondrules and chondrule fragments tend to merge with the matrix. The matrix contains abundant metallic iron, troilite, olivine and pyroxene with some isolated large olivine and pyroxene crystals. Olivine and pyroxene are unzoned and some of the pyroxene grains are polysynthetically twinned clinobronzite. Microprobe analyses show uniform olivine (Fa18.5) and pyroxene (Wo1.5En83Fs15.5). Limonite staining is present in minor amounts. The meteorite is classified as an H4 chondrite.