Congrats Todd! Great find.
Eric
On 1/25/2010 2:06 PM, Wayne Holmes wrote:
Congratulations to Todd Parker on his new classification Thumb Butte.
One nicely Oriented 104 g specimen H3.8 Chondrite. Todd found this
specimen while hunting in the Bullhead/Laughlin area in Mar, 2008.
This is the first of Todds 4 new cold finds to be classified.
Check out the pictures on my website (first page, scroll down).
http://www.meteoritesrock.com/index.html
Thumb Butte 35º 10.196´N 114° 27.351´ W
Mojave County, Arizona, USA
Find: 1 March 2008
Ordinary chondrite (H3.8)
History: Mr. Todd Parker found a 104 g stone on a small,
alluvium-covered flat just west of Thumb Butte and 4 miles east of
Bullhead City, Mojave Co., Arizona.
Physical characteristics: The single stone is mostly covered by
moderately weathered reddish-brown fusion crust.
Petrography (T. Bunch and J. Wittke, NAU): Chondrules have sharp
outlines with a mean diameter of ~0.4 mm. Matrix is slightly
recrystallzed with some remnant calcic glass. Chondrule mesostasis is
clear to turbid and several chondrules are armored with metal and
minor FeS. Contains olivine, orthopyroxene, kamacite, FeS, taenite,
merrillite, Cl-apatite, chromite and a trace of plagioclase. Fresh
interior with reddish staining, weathering grade is W1. Shock level is
S2.
Mineral compositions: Olivine, Fa17.3 - 24; orthopyroxene, Fs15.7 -
19.1Wo 1.5 - 2.3; taenite Ni = 41.2 wt%; chromite cr# = 86.
Classification: Ordinary chondrite (H3.8).
Type specimen: 20 g are on deposit at NAU. Mr. Todd Parker holds the
main mass.
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