344:
351:
685:
564:
462:. The unit now known as Los Bastos Formation was included in the original definition by Herrero Ducloux (1938, 1939) as "Portezuelo Medio", as part of the "Portezuelo Beds" he described.
493:
environment characterized by sinuous channels. Based on the stratigraphic relations with the overlying and underlying units, the age has been estimated to be early to middle
473:, between the localities of Sierra Barrosa and Cerro Senillosa. The formation at its type section reaches a thickness of 35 metres (115 ft). The formation comprises red
655:
597:(2012), "First dryolestoid (Mammalia, Dryolestoidea, Meridiolestida) from the Coniacian of Patagonia and new evidence on their early radiation in South America",
645:
528:
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670:
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451:
400:
132:
680:
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412:
142:
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The formation was named by
Garrido in 2010 as shaly unit conformably and transitionally overlying the
315:
443:
408:
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117:
388:
282:
486:
372:
608:
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24:
446:, to which the layers were formerly defined and in the same manner underlying the
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The type locality of the formation is located at the foot of the
485:. The formation has similar lithological characteristics as the
411:, in which it was formerly included and is overlain by the
622:
El Grupo Neuquén (Cretácico Tardío) en la Cuenca
Neuquina
625:, XVIII Congreso Geológico Argentino, pp. 231–244
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686:Fossiliferous stratigraphic units of South America
481:and fine well-sorted yellowish to greenish grey
8:
350:
593:Forasiepi, A. M.; Coria, R. A.; Hurum, J.;
434:mammal were recovered from the formation.
15:
656:Upper Cretaceous Series of South America
529:List of dinosaur bearing rock formations
539:
505:The formation has provided fossils of:
7:
14:
415:. Los Bastos Formation comprises
646:Geologic formations of Argentina
358:Los Bastos Formation (Argentina)
349:
342:
477:intercalated by thin levels of
1:
407:. The formation overlies the
391:. The formation dates to the
162:Up to 35 m (115 ft)
237:Approximate paleocoordinates
701:Geology of Neuquén Province
696:Geology of Mendoza Province
619:Garrido, Alberto C (2011),
722:
691:Paleontology in Argentina
613:10.5710/AMGH.8.8.2012.581
397:early to middle Coniacian
337:
23:
448:Sierra Barrosa Formation
413:Sierra Barrosa Formation
143:Sierra Barrosa Formation
489:and was deposited in a
450:, all belonging to the
580:Forasiepi et al., 2012
515:Meridiolestida indet.
399:, and belongs to the
220:38.83889°S 68.78472°W
706:Geology of Patagonia
676:Sandstone formations
661:Cretaceous Argentina
565:Los Bastos Formation
555:Garrido, 2011, p.237
546:Garrido, 2011, p.236
452:Río Neuquén Subgroup
444:Portezuelo Formation
409:Portezuelo Formation
401:Río Neuquén Subgroup
369:Los Bastos Formation
225:-38.83889; -68.78472
153:Portezuelo Formation
133:Río Neuquén Subgroup
118:Geological formation
19:Los Bastos Formation
671:Mudstone formations
255: /
216: /
29:Early-mid Coniacian
25:Stratigraphic range
487:Lisandro Formation
373:geologic formation
469:of the eponymous
366:
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681:Fluvial deposits
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471:Los Bastos Field
379:in the northern
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316:Los Bastos Field
283:Neuquén Province
279:Mendoza Province
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666:Coniacian Stage
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423:deposited in a
393:Late Cretaceous
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607:(4): 497–504,
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501:Fossil content
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651:Neuquén Group
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595:Currie, P. J.
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460:Neuquén Basin
457:
456:Neuquén Group
453:
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432:meridiolestid
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405:Neuquén Group
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383:provinces of
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377:Neuquén Basin
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301:Neuquén Basin
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259:42.3°S 49.0°W
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128:Neuquén Group
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35:89.8–88
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627:, retrieved
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587:Bibliography
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368:
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330:Year defined
307:Type section
264:-42.3; -49.0
600:Ameghiniana
569:Fossilworks
438:Description
428:environment
262: /
223: /
198:Coordinates
640:Categories
629:2020-07-07
535:References
483:sandstones
479:siltstones
421:sandstones
381:Patagonian
211:68°47′05″W
208:38°50′20″S
495:Coniacian
475:mudstones
417:mudstones
312:Named for
292:Argentina
186:Sandstone
167:Lithology
159:Thickness
139:Underlies
523:See also
322:Named by
192:Location
176:Mudstone
149:Overlies
510:Mammals
491:fluvial
467:outcrop
458:in the
454:of the
425:fluvial
403:of the
389:Neuquén
385:Mendoza
375:of the
333:Garrido
289:Country
250:49°00′W
247:42°18′S
172:Primary
124:Unit of
104:↓
297:Extent
275:Region
131:
371:is a
182:Other
571:.org
430:. A
419:and
387:and
325:2010
114:Type
43:PreꞒ
609:doi
567:at
642::
605:49
603:,
497:.
395:,
93:Pg
37:Ma
27::
611::
98:N
88:K
83:J
78:T
73:P
68:C
63:D
58:S
53:O
48:Ꞓ
32:~
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