Newsletter for Orphaned Meteorites from USA – Volume 1 No. 3 -- September 2015
by Robert Verish

Bob's Bulletin

A newsletter for "orphaned" meteorites from the USA.

Petrographic Description for Meteorite N140531C

Field ID Number N140531C
Newsletter 01-3
Location Nevada, USA
Thin-section ID Number V14DC
Dimensions 2.4cm x 2cm x 1.2cm
Weight 9.35 grams
Type Specimen 2.4gram endcut - plus thin-section .
Class Ordinary Chondrite (quite possibly unequilibrated)
Weathering Grade mid-range (but very likely above "W3")
Shock Stage low (most likely "S2" or lower)
Macroscopic Description -- R. Verish
The exterior of this meteorite is so weathered it can't be determined whether it is a whole individual stone or a fragment. The dark, brownish-black exterior of this chondrite is lacking a fusion crust. Stone appears to have experienced some sort of mechanical weathering, or some sort of chemical-weathering that has preferrentially attacked the groundmass leaving the chondrules standing-out in high relief. The interior is a dark-brown, porous matrix with very low metal-grain content, and few troilite grains. The chondrules and inclusions are very distinct, and on the exterior they stand-out in high relief.
Thin Section Description -- R. Verish
The section exhibits a variety of chondule sizes (and angular inclusions), in a porous groundmass of fine-grained silicates, troilite and rare metal. Very weak mosaic shock effects are present. Silicates are unequilibrated. This meteorite is probably a low-shock, unequilibrated chondrite.
Name: N140531C - This meteorite might be paired to N150814D, another ordinary chondrite from this locality.
USA Orphaned Meteorite Images for Specimen ID# N140531Cv15dc66adj

The above example is one way in which I can bring attention to what I predict will be an increasing number of unclassified meteorites found here in the USA. Hopefully, attention will be drawn to what I see as a growing problem, and maybe some institution will offer to help get some of these orphans classified and cataloged.

A newsletter for "orphaned" meteorites from the USA.

For for more information, please contact me by email:
bolidechaser at yahoo-dot-com