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Basic information Name: Redwater
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2009
Country: Canada
Mass:help 230 g
Meteoritical Bulletin:  MB 98  (2010)  H4
Recommended:  H4    [explanation]

This is 1 of 6415 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 29 Apr 2010
Writeup from MB online:

Redwater        53°55.974’N, 112°58.620’W

Alberta, Canada

Found: 30 Aug 2009

Classification: Ordinary chondrite (H4)

History: Found by Brad Newman along an off-road trail within well-sorted sand, likely postglacial in nature. The 223.7 g main mass was found first, followed by a 5.77 g fragment found within 2 meters of the main mass. The smaller fragment fits into a hole in the side of the main mass.

Physical characteristics: The specimen is highly weathered, with a rusty exterior and penetrated by mm-scale fractures. In spite of the weathering, the specimen is an oriented individual. The fusion crust is preserved, and shows a "rollover rim" on the trailing edge.

Petrography: (C. Herd and B. Benoit, UAb) Consists of well-defined chondrules in a fine-grained matrix. Chondrule textures include cryptocrystalline, barred olivine, radial pyroxene, porphyritic olivine, porphyritic pyroxene and porphyritic olivine-pyroxene. Chondrules range in size from 0.1 to 1 mm in diameter. Some olivine grains display undulatory extinction. Brecciation is apparent in thin section. In hand specimen, fractures penetrate through the meteorite, and although obscured by weathering, some brecciation at this scale is apparent. Metal is preserved between fractures. A density of 3.13 ± 0.01 g/cm3, obtained by an archimedian method, is consistent with heavy weathering.

Geochemistry: Average olivine and pyroxene compositions (electron microprobe): Fa19.2±1.3 (PMD = 6.5); Fs16.2±1.5 (PMD = 8.9), Wo1.3±0.3. Chondrule mesostasis augite of composition Fs6.2, Wo46.3 is also present.

Classification: Ordinary chondrite (H4), S2, W5.

Specimens: A total sample mass of 40.5 g including one thin section are on deposit at UAb. Main mass, B. Newman (St. Albert, Alberta).

Data from:
  Table 1
  Line 2:
Origin or pseudonym:Postglacial sand
Date:30 Aug 2009
Mass (g):229.5
Shock stage:S2
Weathering grade:W5
Fayalite (mol%):19.2 ± 1.3
Ferrosilite (mol%):16.2 ± 1.5
Wollastonite (mol%):1.3 ± 0.3
Classifier:C. Herd, UAb
Type spec mass (g):40.5
Type spec location:UAb
Main mass:B. Newman
Finder:B. Newman
Comments:Submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 98, MAPS 45, 1530-1551 (2010)
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     Recommended::   (53° 55' 58"N, 112° 58' 37"W)

     This is 1 of 17 approved meteorites from Alberta, Canada (plus 3 impact craters)
     This is 1 of 66 approved meteorites from Canada (plus 5 unapproved names) (plus 31 impact craters)
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