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The formation was named the Los Pinos Gravel by E.S. Larsen and reported in 1932. It was designated the Los Pinos Member of the
Hinsdale Formation, which it closely resembles, by
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The age of the formation is presently constrained by radiometric ages of interbedded flows and underlying and overlying formations. The underlying
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731:"Geophysical expression of elements of the Rio Grande rift in the northeast Tusas Mountains - Preliminary interpretations"
535:). Interbedded flows have been dated at 17.7 Ma and 20.7 Ma. Flows of the overlying Servilleta Formation are 4.5 Ma old.
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729:
Drenth, Benjamin J.; Turner, Kenzie J.; Thompson, Ren A.; Grauch, V. J. S.; Cosca, Michaela A.; Lee, John P. (2011).
22:
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Manley, Kim (1981). "Redefinition and description of the Los Pinos
Formation of north-central New Mexico".
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is located along Los Pinos Creek, near the town of San Miguel in extreme northern New Mexico (
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to the north. It thins to the south, where it underlies the
Cordito Member. The
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707:"A brief review of the geology of the San Juan region of southwestern Colorado"
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638:"Physiogeography and Quaternary geology of the San Juan Mountains, Colorado"
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and Larsen in 1935, and raised to formation rank by Fred Barker in 1958.
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680:"Precambrian and Tertiary geology of Las Tablas quadrangle, New Mexico"
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458:). It also likely present in the subsurface of the southwestern
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and possibly another center buried beneath basalt flows of the
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clasts, was eroded from source areas to the east, such the
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10.1130/0016-7606(1981)92<984:RADOTL>2.0.CO;2
684:
New Mexico Bureau of Mines and
Mineral Resources Bulletin
738:
New Mexico
Geological Society Field Conference Series
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have radiometric ages of 29.8 to 28.2 million years (
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473:The Los Pinos Formation is divided into two
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642:U.S. Geological Survey Professional Paper
395:and overlying and underlying formations.
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488:in composition, eroded mostly from the
403:The Los Pinos Formation is principally
322:Los Pinos Formation (the United States)
179:26,000 km (10,000 sq mi)
759:Geological Society of America Bulletin
619:
568:
128:Esquibel Member of Los Pinos Formation
7:
636:Atwood, W.W.; Mather, K.F. (1932).
801:Paleogene formations of New Mexico
18:A geologic formation in New Mexico
14:
796:Neogene formations of New Mexico
469:Road cut exposing Cordito Member
350:Los Pinos Formation (New Mexico)
341:
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711:U.S. Geological Survey Bulletin
147:Esquibel & Cordito Members
23:Los Pinos Formation, Argentina
1:
325:Show map of the United States
376:. It was deposited from the
415:flows. It crops out in the
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520:with the Cordito Member.
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584:Atwood & Mather 1932
539:History of investigation
187:500 ft (150 m)
21:Not to be confused with
705:; Larsen, E.S. (1935).
663:2027/mdp.39015086702506
608:Cross & Larsen 1935
490:San Juan volcanic field
166:Treasure Mountain Group
644:. Professional Paper.
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353:Show map of New Mexico
678:Barker, Fred (1958).
545:Charles Whitman Cross
496:, composed mostly of
468:
506:Servilleta Formation
502:Latir volcanic field
446:36.9614°N 106.1693°W
156:Servilleta Formation
771:1981GSAB...92..984M
475:penecontemporaneous
442: /
407:, with interbedded
366:Los Pinos Formation
231: /
37:Stratigraphic range
31:Los Pinos Formation
596:Drenth et al. 2011
529:Masonic Park Tuffs
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451:36.9614; -106.1693
370:geologic formation
235:36.950°N 106.124°W
525:Treasure Mountain
514:Abiquiu Formation
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170:Masonic Park Tuff
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482:Esquibel Member
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494:Cordito Member
460:San Luis basin
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41:Late Oligocene
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746:. Retrieved
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630:Bibliography
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486:intermediate
481:
472:
425:type section
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382:late Miocene
380:through the
372:in northern
365:
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293:Year defined
272:Type section
45:Late Miocene
15:
765:(12): 984.
620:Barker 1958
569:Manley 1981
449: /
437:106°10′09″W
399:Description
387:, based on
288:E.S. Larsen
238: /
226:106°07′26″W
213:Coordinates
790:Categories
551:References
434:36°57′41″N
421:New Mexico
393:lava flows
374:New Mexico
256:New Mexico
223:36°57′00″N
744:: 165–176
720:30 August
669:30 August
518:correlate
498:rhyolitic
277:Named for
254:Northern
192:Lithology
184:Thickness
152:Underlies
144:Sub-units
138:Formation
285:Named by
207:Location
162:Overlies
767:Bibcode
748:14 July
693:28 June
508:in the
478:members
262:Country
197:Primary
480:. The
423:. The
413:basalt
385:epochs
251:Region
734:(PDF)
409:tuffs
368:is a
750:2021
722:2020
695:2020
671:2020
527:and
516:may
411:and
364:The
296:1932
176:Area
134:Type
58:PreꞒ
775:doi
715:843
658:hdl
650:doi
646:166
419:of
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533:Ma
168:,
108:Pg
52:Ma
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113:N
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68:O
63:Ꞓ
43:-
25:.
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