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Re: Monohans 1998
Jeff Grossman schrieb:
> At 10:17 AM 5/7/98 -0700, you wrote:
> >Has the classification of Monohans been determined yet? I have been
> >dying to know since the day I saw them. I hope everyone recieved the
> >photos I took in this issue of Voyage Magazine.
> >Thanks
> >Mike Farmer
> >http://www.concentric.net/~farmerm
> >farmerm@concentric.net
> >
> >
> >
>
> With any luck, the "in press" version of the Meteoritical
> Bulletin will be on-line in a couple of hours. It has lots
> of new stuff, including Monahans (1998). Check later today
> at:
> Http://www.uark.edu/studorg/metsoc/metbull.htm
>
> jeff
>
> (p.s., it's an H5, with some very unusual minerals).
Hey folks,
It is already there! Go and look!
Regards, Bernd
Monahans (1998)
31º36'30"N 102º51'30"W
Ward County, Texas, USA
Fell 1998 22 March, 18:48 CST
Ordinary chondrite (H5)
Two stones, weighing 1344 g and 1243 g, fell in the city of Monahans,
Texas, after two sonic booms and a fireball were observed over a wide
area (up to 100 km from the fall site). One stone penetrated the asphalt
on a city street and was found in the sandy subsurface. Classification
and mineralogy (M. Zolensky and G. Lofgren, JSC): a light-dark breccia,
with light and black clasts in a gray-colored, pulverized host matrix;
olivine, Fa18.8 (host); pyroxene, Fs17.1Wo1.4 (host); plagioclase,
An1–19Ab70–75Or6–29 (all lithologies);shock stage S2 (light clasts) to
S4 (black clasts); the gray-colored matrix material contains blue
crystals of indigenous halite and sylvite, some up to 3 mm in diameter,
some euhedral. Specimens: both masses are owned by the City of Monahans,
contact the City Manager; type specimen, 20 g, contact Dr. Everett
Gibson, JSC. The iron meteorite (group IIF) that was found south of
Monahans, Texas, in 1938 will be designated henceforth as Monahans
(1938).
References: