Meteoritical Bulletin: Entry for Morrow County

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Morrow County

Basic information

Name: Morrow County
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1999
Country: United States
Mass: 18.2 kg

Classification
history:

Meteoritical Bulletin:	MB 98	(2010)	L6
Recommended:			L6 [explanation]

This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 4 May 2010

Writeup

Writeup from MB 107:

The main mass of Morrow County is now deposited at RiceNW. See uploaded photograph.

Data from:
  MB98
  Table 1
  Line 268:

State/Prov/County:	Oregon
Origin or pseudonym:	farmland atop dissected basalt plateau
Date:	1999
Latitude:	45.5±0.5°N
Longitude:	119.5±0.5°W
Mass (g):	18200
Pieces:	1
Class:	L6
Shock stage:	S5
Weathering grade:	W1
Fayalite (mol%):	24.5±0.4
Ferrosilite (mol%):	20.4 ±0.1
Classifier:	M. Hutson, A.Ruzicka, R. Pugh, Cascadia
Type spec mass (g):	25.4
Type spec location:	Cascadia
Main mass:	D. E. Wesson
Finder:	Donald E. Wesson
Comments:	Oriented specimen. Coordinates are approximate for center of the county. The specific find coordinates are not known.; submitted by A. Ruzicka

Institutions
and collections

Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
RiceNW: Rice Northwest Museum of Rocks and Minerals 26385 NW Groveland Drive Hillsboro, OR 97124, United States (institutional address; updated 2 Dec 2018)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 98, MAPS 45, 1530-1551 (2010)
Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

Find references in NASA ADS:
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Photos:

Credit	Photos
Public domain photographs:
Julian Gray, RiceNW Museum

Geography:

United States

Coordinates:
Recommended::	(45° 30'N, 119° 30'W)

Statistics:
This is 1 of 6 approved meteorites from Oregon, United States (plus 2 unapproved names)
This is 1 of 1927 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)

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Revision
history:

This lists important revisions made to data for this record.

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