Geology Reference
In-Depth Information
(c)
(d)
(e)
(f)
Figure 2.3.
Field portraits of meteorites illustrating some diagnostic characteristics. The counter shows the field number used to
identify each specimen while in the field (and is not the formal sample number later assigned by the Antarctic meteorite curator at
NASA's Johnson Space Center). (a) LAR 06266, A typical (albeit large) find in a moraine showing the distinctive fusion crust and
rust staining associated with an H5 ordinary chondrite. (b) A large rounded CV3 carbonaceous chondrite (LAR 12002) showing
prominent chondrules and evaporite growth on its downwind and sunnier northern side. (c) GRO 06059, an achondrite displaying
the glossy fusion crust commonly associated with feldspar-rich eucrites. (d) LAR 12320, a diogenite with multicolored fusion crust
ranging from black to yellow-green. (e) Reasons not to high-grade during searches, example one: this mundane-looking specimen
is MIL 11207, an amphibole-bearing R6 chondrite. (f) Reasons not to high-grade during searches, example two: MIL 07259, an
acapulcoite / lodranite of nondescript appearance.
