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Basic information Name: Puente-Ladron
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 1944
Country: United States
Mass:help 7.7 g
NHM Catalogue:  5th Edition  (2000)  L
MetBase:  v. 7.1  (2006)  L
Meteoritical Bulletin:  MB 103  (2014)  L6
Recommended:  L6    [explanation]

This is 1 of 11460 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: Revised 24 Jul 2014: Full classification
Writeup from MB 103:

Description and full classification of Puente-Ladron

History: On May 17, 1944, Harvey H. Nininger stopped for lunch along a stretch of highway in New Mexico and found an unusual-looking stone in the desert that he thought might be a meteorite, which it was. The full writeup of his discovery was published by Nininger (1944). This was the only cold find of his career.

Physical characteristics: Single 7.673 g fusion-crusted roughly pyramidal 1.5 × 1.5 × 2 cm stone. Fusion crust is dark gray and relatively fresh, with minor weathering and few cracks. A few recognizable chondrules (up to 1 mm) visible on sawn surface. Evenly spaced, irregularly shaped metal grains up to 2 mm and troilite grains up to 0.5 mm. Surface criss-crossed by thin black shock veins. Tan and white matrix, with rust around the metal grains. Sparsely distributed chromite grains to 200 μm.

Petrography: In thin section, sample largely recrystallized with rare recognizable chondrules. Chondrule-matrix boundary diffuse. A few barred olivine and porphyritic olivine chondrules present. One 4 × 3 mm achondritic clast composed of pyroxene, olivine, and plagioclase with, grains up to 50 μm. Some plagioclase grains up to 200 μm. Opaque shock veins with melt pockets present. Troilite along shock veins commonly shows shock lamellae. Some troilite is polycrystalline. One kamacite grain shows poorly developed Neumann bands. Some kamacite grains up to 30 μm contain abundant blebs of troilite. Two 10 μm grains of metallic copper found associated with troilite. Partially recrystallized plagioclase. Olivine demonstrates weak undulatory extinction indicative of S2. Sparse euhedral chromite to 50 μm. Minor oxidation around metal grains indicative of S1.

Geochemistry: (S. Glaser, K. Johnson, J. Long and L. Garvie, ASU): EMPA, Olivine Fa25.0±0.3, FeO/MnO=51.4±5.8, n=11; low-Ca pyroxene Fs21.0±0.1Wo1.8±0.3, FeO/MnO=29.5±1.0, n=6; high-Ca pyroxene Fs7.0Wo46.6, FeO/MnO=19.2 and Fs7.8Wo45.6, FeO/MnO=21.4; plagioclase Ab81.4An12.7Or5.8 and Ab79.6An14.1Or6.3

Classification: Ordinary chondrite, L6, W1, S2.

Specimens: 4.51 g stone, one polished thin section, and one polished endpiece, ASU.

Submitted by L. Garvie, ASU.

  • Nininger H.H. (1944) The Puente-Ladron, Socorro County, New Mexico, aerolite. Pop. Astron. 52 407-410 (link)
Data from:
  Table 0
  Line 0:
State/Prov/County:Socorro, New Mexico
Origin or pseudonym:sandy clay flat
Date:1944 May 17
Mass (g):7.673
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):25.0±0.3
Ferrosilite (mol%):21.0±0.1
Wollastonite (mol%):1.8±0.3
Classifier:S. Glaser, K. Johnson, J. Long and L. Garvie, ASU
Type spec mass (g):4.51
Type spec location:ASU
Main mass:ASU
Finder:H.H. Nininger
   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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Public domain photographs:
Laurence Garvie, ASU   

United States
     Catalogue of Meteorites:   (34° 24'N, 106° 51'W)
     Recommended::   (34° 24'N, 106° 51'W)

     This is 1 of 226 approved meteorites from New Mexico, United States (plus 2 unapproved names) (plus 1 impact crater)
     This is 1 of 1865 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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