MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 29 Jan 2023
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Allan Hills A78050
Basic information Name: Allan Hills A78050
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA78050
This meteorite may also be called Allan Hills 78050 (ALH 78050) in publications.

Observed fall: No
Year found: 1978
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 1045 g
Antarctic Meteorite Newsletter:  AMN 3(1)  (1980)  L6
Meteoritical Bulletin:  MB 76  (1994)  L6
NHM Catalogue:  5th Edition  (2000)  L6
NIPR Catalogue:  2000 Edition  (2000)  L6
MetBase:  v. 7.1  (2006)  L6
Recommended:  L6    [explanation]

This is 1 of 12222 approved meteorites (plus 7 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeup from AMN 3(1):
This text was reprinted from AMN 3(1) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: ALHA78050

Location: Allan Hills

Field No.: 262

Weight (gms): 1045.0

Meteorite Type: L6 Chondrite


Physical Description:

This is not a complete specimen. The N, T and B surfaces are fracture surfaces that are stained reddish-brown by iron-oxidation. Inclusions in the meteorite are apparent on these surfaces and patches of remnant fusion crust remain on the B surface. The fusion crust, where present, is mottled brown and black. Unoxidized (<5%) metallic particles, and some metallic particles with oxidation halos are apparent on the sawed surfaces of the sample. Fracturing, with oxidation staining along the margins, is apparent on the W sawed face, as are small irregular inclusions. Dimensions: 15 x 8 x 6 cm.


Petrographic Description: Brian Mason

Chondrules are sparse and ill-defined, their borders tending to merge with the granular groundmass, which consists of olivine and pyroxene, minor subequal amounts of nickel-iron and troilite, a little plagioclase, and accessory chromite. A little limonitic staining is associated with some of the nickel-iron grains. Microprobe analyses show olivine (Fa23), orthopyroxene (Fs20), and plagioclase (An12) of uniform composition. The meteorite is classified as an L6 chondrite.

Data from:
  Table 2
  Line 293:
Origin or pseudonym:Main icefield
Mass (g):1045
Weathering grade:B
Fayalite (mol%):23
Ferrosilite (mol%):20
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
Search for this meteorite in the NIPR database (Japan):   
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 3(1) (1980), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
Find references in NASA ADS:
Find references in Google Scholar:

     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 43'S, 159° 40'E)

     This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page