299:
306:
430:
The highly diverse fauna of the analyzed succession, made up with numerous stenohaline elements such as echinoderm, bryozoa, ammonite as well as serpulids and typical marine pelecypods indicate a fully marine environment.
686:
Palma, R. M.; Lanes, S. G. (2001), "Shell Bed
Stacking Patterns in the Chachao Formation (Early Valanginian) in MalargĂŒe Area, Mendoza Province, Neuquen Basin, Argintina",
834:
403:
387:
393:
737:
623:
794:
463:
362:
130:
646:"First record of the Valanginian positive carbon isotope anomaly in the Mendoza shelf, Neuquén Basin, Argentina: palaeoclimatic implications"
526:
491:
484:
426:
561:
540:
789:
397:. Different kinds of semi-infaunal soft bottom dwellers and swimming bivalves were recognized. Additional forms are represented by
644:
GĂłmez Dacal, Alejandro R.; GĂłmez Peral, LucĂa E.; Spalletti, Luis A.; Sial, Alcides N.; Siccardi, Aron; PoirĂ©, Daniel G. (2018),
298:
844:
735:
Palma, R. M.; Angeleri, M. P. (1992), "Early
Cretaceous serpulid limestones: Chachao Formation, Neuquen basin, Argentina",
607:
839:
824:
233:
194:
819:
809:
799:
645:
814:
187:
765:
Aguirre Urreta, M.B (1989), "The
Cretaceous decapod Crustacea of Argentina and the Antarctic Peninsula",
804:
688:
829:
767:
746:
697:
347:
328:
120:
8:
750:
701:
722:
754:
705:
667:
659:
554:
332:
268:
351:
286:
547:
370:
140:
650:
582:
413:
226:
783:
663:
470:
248:
235:
209:
196:
70:
27:
627:
611:
576:
449:
408:
366:
343:
150:
45:
31:
758:
709:
672:
478:
365:, sediments deposited on the Mendoza Shelf. The formation overlies the
90:
55:
512:
398:
355:
339:
336:
165:
95:
39:
716:
Aguirre Urreta, M. B.; Ălvarez, P. P. (1999), "The
Berriasian genus
643:
568:
533:
457:
443:
417:
175:
85:
80:
65:
60:
50:
519:
505:
499:
346:
in age and is predominantly marine, being deposited at a time of
100:
75:
382:
381:
A typical feature of the
Chachao Formation is the dominance of
715:
835:Fossiliferous stratigraphic units of South America
439:The formation has provided the following fossils:
781:
764:
734:
603:
601:
720:in Argentina and the problem of its age",
685:
671:
305:
795:Lower Cretaceous Series of South America
617:
598:
782:
13:
14:
856:
434:
16:Geological formation in Argentina
790:Geologic formations of Argentina
420:are represented by the colonial
385:, many of them quite large e.g.
354:, and predominantly consists of
304:
297:
43:
637:
608:Chachao Coquina - Taphofacies 3
376:
1:
591:
361:The formation belongs to the
313:Chachao Formation (Argentina)
227:Approximate paleocoordinates
7:
845:Geology of Mendoza Province
10:
861:
450:Callianassa aff. peruviana
840:Paleontology in Argentina
689:Carbonates and Evaporites
527:Amphidonte (Ceratostreon)
471:Olcostephanus curacoensis
404:Olcostephanus curacoensis
391:, and others small, e.g.
292:
282:
274:
264:
225:
186:
181:
171:
161:
156:
146:
136:
126:
116:
26:
21:
664:10.5027/andgeoV45n2-3059
424:, and the solitary form
825:Shallow marine deposits
492:Sarcinella occidentalis
369:and is overlain by the
730:(Special Issue): 15â29
464:Groebericeras bifrons
388:Aetostreon latissimun
820:Open marine deposits
810:Limestone formations
800:Cretaceous Argentina
520:Exogyra (Aetostreon)
348:marine transgression
329:geological formation
121:Geological formation
815:Mudstone formations
751:1992Faci...27..175P
702:2001CarEv..16..168P
245: /
206: /
28:Stratigraphic range
759:10.1007/BF02536810
710:10.1007/BF03175834
583:Thalassinoides sp.
414:Thalassinoides sp.
394:Ceratostreon minos
805:Valanginian Stage
723:Scripta Geologica
624:Chachao Formation
325:Chachao Formation
321:
320:
22:Chachao Formation
852:
776:
761:
731:
712:
682:
681:
680:
675:
631:
621:
615:
605:
333:Mendoza Province
308:
307:
301:
269:Mendoza Province
260:
259:
257:
256:
255:
250:
246:
243:
242:
241:
238:
221:
220:
218:
217:
216:
211:
207:
204:
203:
202:
199:
112:
42:
19:
18:
860:
859:
855:
854:
853:
851:
850:
849:
780:
779:
678:
676:
640:
635:
634:
622:
618:
606:
599:
594:
506:Exogyra caudoni
437:
379:
371:Agrio Formation
317:
316:
315:
314:
311:
310:
309:
253:
251:
247:
244:
239:
236:
234:
232:
231:
214:
212:
208:
205:
200:
197:
195:
193:
192:
141:Agrio Formation
111:
110:
109:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
58:
53:
48:
37:
36:
34:
17:
12:
11:
5:
858:
848:
847:
842:
837:
832:
827:
822:
817:
812:
807:
802:
797:
792:
778:
777:
762:
745:(1): 175â178,
732:
713:
696:(2): 168â180,
683:
658:(2): 111â129,
651:Andean Geology
639:
636:
633:
632:
616:
596:
595:
593:
590:
589:
588:
587:
586:
574:
573:
572:
565:
558:
551:
544:
537:
530:
523:
516:
509:
497:
496:
495:
488:
485:Parsimonia sp.
476:
475:
474:
467:
455:
454:
453:
436:
435:Fossil content
433:
427:Parsimonia sp.
422:Sarcinella sp.
378:
375:
319:
318:
312:
303:
302:
296:
295:
294:
293:
290:
289:
284:
280:
279:
276:
272:
271:
266:
262:
261:
229:
223:
222:
190:
184:
183:
179:
178:
173:
169:
168:
163:
159:
158:
154:
153:
148:
144:
143:
138:
134:
133:
128:
124:
123:
118:
114:
113:
106:
105:
104:
99:
94:
89:
84:
79:
74:
69:
64:
59:
54:
49:
44:
24:
23:
15:
9:
6:
4:
3:
2:
857:
846:
843:
841:
838:
836:
833:
831:
830:Neuquén Basin
828:
826:
823:
821:
818:
816:
813:
811:
808:
806:
803:
801:
798:
796:
793:
791:
788:
787:
785:
774:
770:
769:
768:Palaeontology
763:
760:
756:
752:
748:
744:
740:
739:
733:
729:
725:
724:
719:
718:Groebericeras
714:
711:
707:
703:
699:
695:
691:
690:
684:
674:
669:
665:
661:
657:
653:
652:
647:
642:
641:
629:
625:
620:
613:
609:
604:
602:
597:
585:
584:
580:
579:
578:
575:
571:
570:
566:
564:
563:
562:Ptychomya sp.
559:
557:
556:
552:
550:
549:
545:
543:
542:
541:Myoconcha sp.
538:
536:
535:
531:
529:
528:
524:
522:
521:
517:
515:
514:
513:Cucullaea sp.
510:
508:
507:
503:
502:
501:
498:
494:
493:
489:
487:
486:
482:
481:
480:
477:
473:
472:
468:
466:
465:
461:
460:
459:
456:
452:
451:
447:
446:
445:
442:
441:
440:
432:
429:
428:
423:
419:
416:
415:
410:
406:
405:
401:, ammonites (
400:
396:
395:
390:
389:
384:
374:
372:
368:
364:
363:Mendoza Group
359:
357:
353:
352:Neuquén Basin
349:
345:
341:
338:
334:
330:
326:
300:
291:
288:
287:Neuquén Basin
285:
281:
277:
273:
270:
267:
263:
258:
249:33.8°S 33.0°W
230:
228:
224:
219:
210:35.0°S 69.7°W
191:
189:
185:
180:
177:
174:
170:
167:
164:
160:
155:
152:
149:
145:
142:
139:
135:
132:
131:Mendoza Group
129:
125:
122:
119:
115:
102:
97:
92:
87:
82:
77:
72:
67:
62:
57:
52:
47:
41:
38:140â136
33:
29:
25:
20:
772:
766:
742:
736:
727:
721:
717:
693:
687:
677:, retrieved
655:
649:
638:Bibliography
619:
581:
577:Ichnofossils
569:Trigonia sp.
567:
560:
553:
546:
539:
534:Eriphyla sp.
532:
525:
518:
511:
504:
490:
483:
469:
462:
448:
438:
425:
421:
412:
409:ichnofossils
402:
392:
386:
380:
360:
335:in northern
324:
322:
254:-33.8; -33.0
215:-35.0; -69.7
673:11336/64562
628:Fossilworks
612:Fossilworks
377:Description
367:Vaca Muerta
344:Valanginian
252: /
213: /
188:Coordinates
151:Vaca Muerta
32:Valanginian
784:Categories
679:2019-02-22
592:References
555:Pecten sp.
479:Polychaeta
399:gastropods
337:Patagonian
775:: 499â552
548:Pinna sp.
458:Ammonites
418:Serpulids
356:carbonate
340:Argentina
278:Argentina
166:Limestone
157:Lithology
137:Underlies
500:Bivalves
444:Decapods
411:such as
342:. It is
182:Location
176:Mudstone
147:Overlies
747:Bibcode
698:Bibcode
407:), and
383:oysters
358:rocks.
350:in the
331:in the
275:Country
240:33°00âČW
237:33°48âČS
201:69°42âČW
198:35°00âČS
162:Primary
127:Unit of
107:↓
738:Facies
283:Extent
265:Region
327:is a
172:Other
630:.org
614:.org
323:The
117:Type
46:Preê
755:doi
706:doi
668:hdl
660:doi
626:at
610:at
786::
773:32
771:,
753:,
743:27
741:,
726:,
704:,
694:16
692:,
666:,
656:45
654:,
648:,
600:^
373:.
96:Pg
40:Ma
30::
757::
749::
728:3
708::
700::
670::
662::
101:N
91:K
86:J
81:T
76:P
71:C
66:D
61:S
56:O
51:ê
35:~
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