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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:help 787 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  L5
Recommended:  L5    [explanation]

This is 1 of 6546 approved meteorites (plus 4 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
Writeuphelp
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 Fa25.3 (FeO/MnO = 52); low Ca pyroxene is Fs21.4Wo1.4; 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 40 approved meteorites from Oklahoma, United States (plus 2 unapproved names) (plus 1 impact crater)
     This is 1 of 1835 approved meteorites from United States (plus 358 unapproved names) (plus 28 impact craters)
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