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   Antarctic Meteorite Newsletter, Volume 30, No. 1 - February 2007
Petrographic Descriptions   (Select a sample)


 
LAP 04751
LAP 04757
LAP 04771
 
LAP 04773
LAP 04775
LAP 04779
 
MCY 05239
MIL 05010
MIL 05013
 
MIL 05041
MIL 05062
MIL 05076
 
MIL 05086
MIL 05155
MIL 05165
 
PRA 04401
PRA 04402
RBT 04260
 
RBT 04261
RBT 04262


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Sample No.: MIL 05062; MIL 05165
Location: Miller Range
Field No.: 18769; 18721
Dimensions (cm):   3.6x3.5x2.1; 5.0x3.0x1.5
Weight (g): 23.788; 25.611
Meteorite Type: Howardite


Macroscopic Description: Cecilia Satterwhite and Kathleen McBride
30-40% brown/black fusion crust is on the exteriors with polygonal fractures. The interiors are tan to gray in color and are friable. No metal is visible. Black and white inclusions and odd shaped clasts of various colors are visible.


Thin Section (,2) Description: Tim McCoy and Valerie Reynolds
The sections are so similar that a single description suffices. The sections show a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic clasts ranging up to 5 mm. Fine-grained clasts, presumably impact melt in origin, are observed. Most of the pyroxene is orthopyroxene and pigeonites with compositions ranging from Fs29-57Wo1-7, although augite of Fs40-60Wo24-40 is found. The Fe/Mn ratio is ~30 and feldspar is anorthitic (An90-92). The meteorites are howardites.



Thin Section Images

Cross-Polarized
Light MIL 05062
Plane-Polarized
Light MIL 05026
MIL 05062 - Cross-Polarized Light MIL 05062 - Plane-Polarized Light
Cross-Polarized
Light MIL 05165
Plane-Polarized
Light MIL 05165
MIL 05165 - Cross-Polarized Light MIL 05165 - Plane-Polarized Light



Lab Images

MIL 05062
MIL 05062
MIL 05062
MIL 05062
MIL 05062
MIL 05062
MIL 05062
MIL 05165
MIL 05165