Meteoritical Bulletin: Entry for Keystone Lake

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Keystone Lake

Basic information

Name: Keystone Lake
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2003
Country: United States
Mass: 787 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	L5
Recommended:			L5 [explanation]

This is 1 of 8890 approved meteorites (plus 5 unapproved names) classified as L5. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 24 Apr 2013

Writeup

Writeup from MB 102:

Keystone Lake 36°17’2.48"N, 96°26’13.22"W

Pawnee County, Oklahoma, USA

Found: 22 Dec 2003

Classification: Ordinary chondrite (L5)

History: A 787 g stone was found by Chris Cooper while searching for artifacts along the shore of Keystone Lake, 2.5 miles SE of Cleveland, Oklahoma.

Physical characteristics: Light- to dark-brown with a few patches of weathered crust.

Petrography: Unbrecciated texture with chondrules set in a dark weathered matrix. Shock level is S2 and weathering grade is W4.

Geochemistry: Olivine is Fa_25.3(FeO/MnO = 52); low Ca pyroxene is Fs_21.4Wo_1.4; rare metal, Ni = 5.2 wt %.

Classification: Ordinary chondrite (L5).

Specimens: 22 g at PSF. Chris Cooper holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:

State/Prov/County:	Oklahoma
Date:	22 Dec 2003
Latitude:	36°17'2.48"N
Longitude:	96°26'13.22"W
Mass (g):	787
Pieces:	1
Class:	L5
Shock stage:	S2
Weathering grade:	W4
Fayalite (mol%):	25.3
Ferrosilite (mol%):	21.4
Wollastonite (mol%):	1.4
Classifier:	T. Bunch and J. Wittke, NAU; P. Sipiera, PSF
Type spec mass (g):	22
Type spec location:	PSF
Main mass:	C. Cooper
Finder:	C. Cooper
Comments:	Submitted by Bunch

Institutions
and collections

NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015

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Geography:

United States

Coordinates:
Recommended::	(36° 17' 2"N, 96° 26' 13"W)

Statistics:
This is 1 of 43 approved meteorites from Oklahoma, United States (plus 2 unapproved names) (plus 1 impact crater)
This is 1 of 1927 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)

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Revision
history:

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