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Carson Lake
Basic information Name: Carson Lake
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1941
Country: United States
Mass:help 18.37 kg
Classification
  history:
Recommended:  H6    [explanation]

This is 1 of 6210 approved meteorites (plus 9 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Apr 2020
Writeuphelp
Writeup from MB 109:

Carson Lake        38º36.432’N, 103º0.087’W

Colorado, United States

Find: 1941

Classification: Ordinary chondrite (H6)

History: Frank Jacobs discovered the 18.37 kg sample in 1941 in a farm field 7.2 miles N of Galatea, Kiowa Co., Colorado (CO Sect. 4 T17SR50W). In 2019, Jake Jacobs and his wife brought the sample to the Colorado School of Mines Museum of Earth Science for identification. Daniel Wray, a museum volunteer, recognized the sample as a meteorite.

Physical characteristics: The sample has an irregular, tabular shape with abundant broad shallow regmaglypts. The exterior of the sample is covered in an orange-colored weathered fusion crust. The interior is dark-brown in color and shows sulfides and a few shiny grains of un-weathered FeNi metal.

Petrography: Description and Classification (A. Love, App) Sample shows recrystallized chondritic texture composed of indistinct chondrules with an average apparent diameter of 623 µm (n=29). Secondary plagioclase has an average grainsize of 60 µm (n=38). Chondrule mesostasis has been completely recrystallized. A region of the sample, bounded by opaque shock veins, is composed of 25-200 µm brecciated grains of olivine, pyroxene and plagioclase. Additional minerals are: troilite, phosphates and chromite.

Geochemistry: (A. Love, App) Olivine (Fa17.9±0.2, Fe/Mn=35.7±0.8 n=12); low Ca pyroxene (Fs15.7±0.1Wo1.3±-0.1, n=12).

Classification: Ordinary Chondrite (H6, C-S3, W3). Based on mineral textures, compositions and grainsize of secondary plagioclase, this sample is an H6.

Specimens: Jake Jacobs holds the main mass. A 38.90 g fragment and a polished thin section are on deposit at App.

Data from:
  MB109
  Table 0
  Line 0:
State/Prov/County:Colorado
Date:1941
Latitude:38º36.432'N
Longitude:103º0.087'W
Mass (g):18370
Pieces:1
Class:H6
Shock stage:C-S3
Weathering grade:W3
Fayalite (mol%):17.9±0.2
Ferrosilite (mol%):15.7±0.1
Wollastonite (mol%):1.3±0.1
Magnetic suscept.:4.55
Classifier:A. Love, App
Type spec mass (g):38.90
Type spec location:App
Main mass:Jake Jacobs
Finder:Frank Jacobs
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:

United States
Coordinates:
     Recommended::   (38° 36' 26"N, 103° 0' 5"W)

Statistics:
     This is 1 of 90 approved meteorites from Colorado, United States (plus 5 unapproved names)
     This is 1 of 1881 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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