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 N140531A

Field ID Number N140531A
Newsletter 01-3
Location Nevada, USA
Thin-section ID Number V14DA
Dimensions 3.5cm x 2.5cm x 2cm
Weight 30.05 grams
Type Specimen 6.4gram endcut - plus thin-section .
Class Ordinary Chondrite (quite possibly an LL6)
Weathering Grade mid-range (but very likely above "W3")
Shock Stage low (most likely "S2" or lower)
Macroscopic Description -- R. Verish
This meteorite is a well-rounded, whole individual stone. The dark, grayish-brown exterior of this chondrite is covered 90% with a thick, relict fusion crust. Very little in the way of rust-spots. The interior is a dark-brown, compact matrix with very low metal-grain content, and few troilite grains. The chondrules and inclusions are not distinct, but don't appear to be variable in size.
Thin Section Description -- R. Verish
The section exhibits a variety of chondule sizes (some up to 3 mm), but most are ill-defined in a dark-brown, iron oxide-rich matrix of fine-grained silicates, troilite and rare metal. Although the exterior of this meteorite has experienced only minimal physical weathering, the interior has undergone chemical weathering and is highly weathered. Very weak mosaic shock effects are present. Silicates are equilibrated. This meteorite is probably a low-shock, equilibrated LL-chondrite.
Name: N140531A - This meteorite might be paired to N140531B, another ordinary chondrite from this locality.
USA Orphaned Meteorite Images for Specimen ID# N140531A

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