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Pecora Escarpment 91355
Basic information Name: Pecora Escarpment 91355
     This is an OFFICIAL meteorite name.
Abbreviation: PCA 91355
Observed fall: No
Year found: 1991
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 16(2)  (1993)  LL3
Meteoritical Bulletin:  MB 76  (1994)  LL3.5
NHM Catalogue:  5th Edition  (2000)  LL3.5
MetBase:  v. 7.1  (2006)  LL3.5
Recommended:  LL3.5    [explanation]

This is 1 of 22 approved meteorites classified as LL3.5.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 16(2):

Sample No.: PCA91355

Location: Pecora Escarpment

Dimensions (cm): 1.5 x 1.2 x 0.8

Weight (g): 3.2

Meteorite Type: LL3 chondrite

 

Macroscopic Description: Cecilia Satterwhite

The exterior is almost completely covered with dull, black, frothy fusion crust. A few light colored inclusions are still visible in the extremely rusted interior.

 

Thin Section (,2) Description: Brian Mason

The section shows numerous chondrules and chondrule fragments, up to 1.2 mm across, in a finely granular matrix of olivine and pyroxene with accessory nickel-iron and sulfide. Brown limonitic staining pervades the section. Olivine compositions range from Fa1 to Fa34, with a marked peak at Fa31; pyroxene compositions range from Fs5 to Fs17. The meteorite is classified as an LL3 chondrite (estimated LL3.5).

 

Data from:
  MB76
  Table 2
  Line 5148:
Origin or pseudonym:Kink Bowl
Mass (g):3.2
Class:LL3.5
Weathering grade:C
Fayalite (mol%):1-34
Ferrosilite (mol%):5-17
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References: Published in Antarctic Meteorite Newsletter 16(2) (1993), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (85° 38'S, 68° 42'W)
     Recommended::   (85° 40' 42"S, 69° 4' 6"W)
Note: the NHM and MetBase coordinates are 5.9 km apart

Statistics:
     This is 1 of 40849 approved meteorites from Antarctica (plus 4494 unapproved names)
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