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Sentinel Plain (d)
Basic information Name: Sentinel Plain (d)
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: United States
Mass:help 119 g
Recommended:  L6    [explanation]

This is 1 of 11733 approved meteorites (plus 6 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 29 Jun 2021
Writeup from MB 110:

Sentinel Plain (d)        32°53’27.78"N, 112°59’30.78"W

Arizona, United States

Find: 13 Apr 2019

Classification: Ordinary chondrite (L6)

History: A 119 g meteorite was found by Mr. Robert Szczuczko on 13 April 2019, while he was searching for meteorites in southwestern Arizona.

Physical characteristics: Single 119 g blocky fusion-crusted stone with shallow regmaglypts. The interior is gray with a few scattered rust colored areas. Few chondrules are visible and metal is heterogeneously distributed.

Petrography: (L. Garvie, ASU, R. Szczuczko) A 5 × 4 cm slice shows a heterogenous distribution of metal. Low metal areas show no recognizable chondrules and sparse metal with grains to 3 mm. Examination of a thin section shows the chondrule- and metal-poor regions to be heavily recrystallized; these areas are typically light gray. Areas with finer grained and dispersed metals show a few recognizable chondrules. Feldspar typically 20 to 60 µm. Relatively abundant, anhedral chromite, to 200 µm.

Geochemistry: Fa25.4±0.5, n=17; Fs21.5±0.5Wo1.7±0.3, n=8

Classification: L6, S2, W1

Specimens: 21 g at ASU

Data from:
  Table 0
  Line 0:
Date:13 Apr 2019
Mass (g):119
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):25.4±0.5
Ferrosilite (mol%):21.5±0.5
Wollastonite (mol%):1.7±0.3
Classifier:L. Garvie, ASU, R. Szczuczko
Type spec mass (g):21
Type spec location:ASU
Main mass:R. Szczuczko
Finder:R. Szczuczko
Comments:ASU#2120; submitted by L. Garvie
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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United States
     Recommended::   (32° 53' 28"N, 112° 59' 31"W)

     This is 1 of 177 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1883 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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