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David Weir: Meteorite Studies
Pluto Walk, Lowell Observatory
This photo was taken September 1990 in Flagstaff, Arizona during a chance meeting between Doug [...]
TENERE-1 (Provisional)
CR7 or Meta-CR (CR-like in MetBull 86; CR-an in MetBull DB) Found March 2000, 20 [...]
ALMAHATA SITTA ORGANICS
As with other ureilites, Almahata Sitta falls on the carbonaceous chondriteCarbonaceous chondrites represent the most [...]
NWA 1912
MesosideriteOne of two main types of stony-iron meteorite, the other being pallasites. Mesosiderites are a [...]
Denshal Dog Data: Is the Nakhla Dog Real?
Separating Myth from Fact: Is the Nakhla Dog Real? A Personal Analysis By David Weir [...]
Auburn
Iron, IIAB: Compositionally related to group IIG Found: before 1867, Coordinates: 32 ° 37′ N., [...]
Landes (placeholder)
Coming Soon
Systematics: Lunar Rock Classification
International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks (2001) I. SEDIMENTARY [...]
COPYRIGHT
Many people think U.S. copyright law was created just to protect those who hold the [...]
Desert Varnish
DESERT VARNISH This widespread desert phenomena has been considered by some to be a biogeochemical [...]
NWA 7475
NORTHWEST AFRICA 7475 click on photos for a magnified view
Bellsbank Quintet: A New Iron Group
THE BELLSBANK QUINTET: The Consummation of a New Iron Group—IIG The five iron meteorites displayed [...]
Martian Meteorite Ejection Ages
MARTIAN METEORITE EJECTION AGES Diagram credit: R. R. Mahajan, 46th LPSC, #1166 (2015) Diagram credit: [...]
Pneumatolytic Process
PNEUMATOLYTIC METAMORPHISM ‘Instead of the formation of the vugs through an igneous process, i.e., by [...]
Meteorite Studies: Introduction
METEORITES: A Systematic Classification Through Photographs By David Weir (Updated regularly since May 1997) “Where [...]
Methods for Dating the Age of Meteorites
Methods of Dating the Age of Meteorites Meteorites are among the oldest objects we know [...]
Systematics: Enstatite Chondrites – Subgroup Classification
PART I: CHONDRITES, METACHONDRITES PART II: PRIMITIVE ACHONDRITES, ACHONDRITES, STONY-IRONS, IRONS PART III: MARTIAN METEORITES—GEOCHEMICAL [...]
Udei Station
Iron, IAB complex, Udei Station grouplet Fell spring 1927 7° 57′ N., 8° 5′ E. [...]
Toluca
Iron, IAB complex, sLL subgroup Found 1776, known earlier 19° 34′ N., 99° 34′ W. [...]
Sutter’s Mill
CM2.0/2.1 chondriteChondrites are the most common meteorites accounting for ~84% of falls. Chondrites are comprised [...]
Saint Sauveur
EH5 Impact-melt brecciaWork in Progress ... A rock that is a mechanical mixture of different [...]
NWA 7135
F3/4 (forsterite chondriteForsterite Chondrites or F-Chondrites are presently only known as inclusions in other meteorites [...]
NWA 5958
C2-ungrouped (CM-like) (C3.0-ung [2012], C2-ung in MetBull 99) Purchased September 2009 Numerous fragments of a [...]
NWA 3329
DiogeniteDiogenites belong to the evolved achondrite HED group that also includes howardites and eucrites. They [...]