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Catalog Data

Expedition:
Antarctic Search for Meteorites (ANSMET)  Search this
Weight:
1.38 g
Place:
Antarctica
Collection Date:
1978
Notes:
# NASA data for ALH 78040 Weathering: A Fracturing: A Pairing: ALH 76005 Fs: 33-52 mol % ²⁶Al: 93 ± 5 dpm/kg
Snow and ice were present on the sample when it was removed from cold storage. This is a complete unweathered specimen. Black, shiny fusion crust ~.5 mm thick covers all the surfaces of the stone. The crust has been removed from the edges by spallation and has been preferentially weathered away on the surfaces in small circular areas. The B and T surfaces have had the most fusion crust removed, thus revealing light to medium gray matrix material that contains small (<1 mm) elongated white grains, probably feldspar. The T and S surfaces each have a 1.0 cm clast present. These clasts have a slightly lighter color than the surrounding fusion crust. On the N surface an oval vug is present. Inside this vug is a weathered yellowish-brown inclusion ~0.5 cm diameter that has a coarser texture than the surrounding matrix material. Cleaving this stone revealed a non-weathered surface with small (1-2 mm) dark gray minerals in the matrix material.
Record Last Modified:
16 Oct 2024
Specimen Count:
1
Other Numbers:
Original meteorite number : ALHA78040,97
USNM Number:
USNM 6834
See more items in:
Mineral Sciences
Meteorites
Inventory Collection
Data Source:
NMNH - Mineral Sciences Dept.
GUID:
http://n2t.net/ark:/65665/3f7e896f5-a1b7-4764-a1ed-f21213b5e7ba
EDAN-URL:
edanmdm:nmnhmineralsciences_1027111