654:
542:
135:
400:
407:
425:
416:
357:
443:
434:
557:, RĂo Negro (39Âş40´S, 67Âş32´W). The fossiliferous beds of the Roca Formation were discovered by G. Rohde Windhausen (1914), who was also the first author to describe these sediments. Schiller (1922) took samples of one section along the ZanjĂłn Roca, from the northern part of General Roca to
613:
of varied yellow limestones and siltstones, interbedded with yellow porous and coarse-grained limestones. The limestones of the middle section are almost devoid of fossil invertebrates. The third section (upper) is 25 to 30 metres (82 to 98 ft). It is mainly composed of white
1030:
del RĂo, Claudia; Conchero, Andrea; MartĂnez, Sergio A. (2011). "The
Maastrichtian – Danian at General Roca (Patagonia, Argentina): a reappraisal of the chronostratigraphy and biostratigraphy of a type locality".
581:
In its type locality, the Roca
Formation is divided into three sections. The first section, that is, the base, is approximately 20 metres (66 ft). It consists of intercalated bioclastic
565:). This author proposed to name the lime kiln as the "classic area", and the westward cliffs from the lime kiln as the "model area" of these beds. The lithological composition of this
653:
1139:
Aguirre-Urreta, M.B., S. CasadĂo, M. Cichowolski, D.G. Lazo y D.L. RodrĂguez, 2008. Afinidades paleobiogeográficas de los invertebrados cretácicos de la Cuenca
Neuquina.
625:
The faunal character on the fossils of marine invertebrates in the Roca
Formation suggests a transgression from the Atlantic Ocean. By contrast, the marine invasions in
936:
541:
1169:
134:
1179:
1184:
1159:
399:
626:
1219:
996:"The Late Cretaceous–Cenozoic transgressions in Patagonia and the Fuegian Andes: foraminifera, palaeoecology, and palaeogeography"
1214:
20:
609:. The second section (middle) is not over 8 metres (26 ft) and consists mainly of limestones. Such section has very thin
573:, and abundant gypsum at the top. The basal and middle sections are approximately 26 metres (85 ft) thick (Weber, 1972).
1066:"A Maastrichtian microbial reef and associated limestones in the Roca Formation of Patagonia (Neuquén Province, Argentina)"
1204:
1199:
1174:
297:
258:
1194:
251:
1164:
953:
RodrĂguez, MarĂa
Fernanda (2011). "El Grupo MalargĂĽe (Cretácico TardĂo-PaleĂłgeno Temprano) en la Cuenca Neuquina".
554:
387:
144:
1209:
890:
566:
907:
818:
802:
782:
742:
915:
184:
865:
1189:
480:
332:
188:
873:
790:
726:
1077:
734:
531:
156:
1118:(BoletĂn NÂş 370). Servicio GeolĂłgico Minero Argentino - Instituto de GeologĂa y Recursos Minerales.
718:
508:
503:
in the north of its distribution, and later moving to the south, where its strata reached the Late
484:
336:
198:
619:
140:
1119:
774:
527:
488:
472:
340:
166:
1064:
Kiessling, Wolfgang; Scasso, Roberto; Aberhan, Martin; Ruiz, Lucas; Weidemeyer, Sven (2006).
1085:
1044:
1036:
1007:
638:
492:
476:
372:
344:
758:
585:
and green claystones. The calcareous materials are highly fossiliferous with textures like
598:
569:
contains gray-yellowish and highly fossiliferous limestones, with greenish claystones and
1081:
535:
290:
661:
The first section of the Roca
Formation has abundant fossiliferous content, including
1153:
1111:
1012:
995:
642:
500:
86:
38:
34:
1040:
810:
686:
682:
512:
530:. The marine sediments of the JagĂĽel and Roca Formations were deposited during a
940:
618:
in large crystals. It has lenticular intercalations of greenish siltstones with
496:
61:
972:
842:
828:
710:
702:
674:
666:
586:
582:
550:
465:
106:
71:
1123:
1110:
RodrĂguez, MarĂa F.; Leanza, HĂ©ctor A.; Salvarredy
Aranguren, MatĂas (2007).
312:
299:
273:
260:
971:
Archuby, Fernando; Salgado, Leonardo; Brezina, Soledad; Parras, Ana (2016).
899:
857:
766:
590:
562:
520:
469:
362:
229:
225:
221:
111:
55:
46:
1090:
1065:
882:
693:
678:
662:
634:
101:
96:
81:
76:
66:
1049:
670:
602:
594:
523:
116:
91:
657:
Limestones in Roca
Formation, Cantera Cholino, General Roca, RĂo Negro
553:
of the Roca
Formation is located 12 kilometres (7.5 mi) north of
973:"Dos orillas, dos mundos: PaleontologĂa del Alto Valle del rĂo Negro"
750:
615:
610:
606:
545:
Lime kiln in Barda Norte
Locality, General Roca, RĂo Negro, Argentina
516:
504:
239:
42:
652:
630:
540:
570:
1033:
Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen
538:, beginning in the Maastrichtian and ending in the Danian.
511:, and the top of the formation is marked by a regional
383:
378:
368:
350:
328:
289:
250:
245:
235:
217:
212:
204:
194:
180:
172:
162:
152:
28:
593:without an obvious orientation of the shells. The
442:
433:
424:
415:
406:
955:Relatorio del XVIII Congreso GeolĂłgico Argentino
479:. It crops out in the Argentinian provinces of
641:were caused by an inflow of seawater from the
8:
994:Malumián, Norberto; Náñez, Carolina (2011).
133:
25:
1089:
1048:
1011:
1000:Biological Journal of the Linnean Society
929:
526:pulse. These two units belong to the
450:Roca Formation, Argentina (Argentina)
7:
1170:Maastrichtian Stage of South America
1135:
1133:
1105:
1103:
1101:
1025:
1023:
966:
964:
507:. It lies transitionally above the
1112:"Hoja Geológica 3969-II - Neuquén"
14:
1185:Paleocene Series of South America
703:Pycnodonte (Phygraea) burckhardti
16:Geological formation in Argentina
1160:Geologic formations of Argentina
1013:10.1111/j.1095-8312.2011.01649.x
711:Pycnodonte (Phygraea) sarmientoi
441:
432:
423:
414:
405:
398:
355:
689:, as well as remains of fish.
1:
1180:Cretaceous–Paleogene boundary
775:Chlamys patagonensis negroina
208:Up to 58 m (190 ft)
850:Turritella aff. T. malaspina
751:Nucula (Leionucula) dynastes
291:Approximate paleocoordinates
1041:10.1127/0077-7749/2011/0103
1236:
18:
1220:Paleontology in Argentina
622:and fragments of gypsum.
393:
132:
33:
796:Venericardia ameghinorum
719:Gryphaeostrea callophyla
675:echinoderms, crustaceans
1215:Shallow marine deposits
891:Callianassa burckhardti
499:, beginning during the
473:lithostratigraphic unit
1091:10.1002/mmng.200600007
1035:. 259/2 (2): 129–156.
843:Turritella burckhardti
658:
546:
908:Linthia joannisboehmi
819:Aphrodina burckhardti
803:Venericardia iheringi
783:Musculus rionegrensis
743:Cubitostrea ameghinoi
656:
544:
1205:Siltstone formations
1200:Limestone formations
1175:Cretaceous Argentina
916:Nucleopygus salgadoi
495:. Its deposition is
157:Geological formation
19:For other uses, see
1195:Paleogene Argentina
1082:2006FossR...9..183K
866:Hercoglossa romeroi
759:Neilo cf. N. ornata
620:wave-formed ripples
309: /
270: /
35:Stratigraphic range
659:
547:
189:Pircala Formations
139:Roca Formation in
977:El Ojo del CĂłndor
685:, and calcareous
475:, located in the
458:
457:
345:Mendoza Provinces
1227:
1210:Shale formations
1144:
1143:45 (3): 593-613.
1137:
1128:
1127:
1107:
1096:
1095:
1093:
1061:
1055:
1054:
1052:
1027:
1018:
1017:
1015:
991:
985:
984:
968:
959:
958:
950:
944:
934:
874:Cimomia camachoi
791:Arca ameghinorum
767:Cucullaea rocana
727:Ostrea wilckensi
639:Early Cretaceous
597:are composed of
509:JagĂĽel Formation
445:
444:
436:
435:
427:
426:
418:
417:
409:
408:
402:
361:
359:
358:
324:
323:
321:
320:
319:
314:
310:
307:
306:
305:
302:
285:
284:
282:
281:
280:
275:
271:
268:
267:
266:
263:
199:JagĂĽel Formation
137:
128:
58:
26:
1235:
1234:
1230:
1229:
1228:
1226:
1225:
1224:
1150:
1149:
1148:
1147:
1138:
1131:
1109:
1108:
1099:
1063:
1062:
1058:
1029:
1028:
1021:
993:
992:
988:
970:
969:
962:
952:
951:
947:
935:
931:
926:
903:
886:
861:
832:
825:
735:Ostrea neuquena
697:
651:
599:montmorillonite
579:
454:
453:
452:
451:
448:
447:
446:
438:
437:
429:
428:
420:
419:
411:
410:
356:
354:
317:
315:
311:
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298:
296:
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278:
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272:
269:
264:
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259:
257:
256:
148:
127:
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119:
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109:
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99:
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89:
84:
79:
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69:
64:
53:
52:
50:
24:
17:
12:
11:
5:
1233:
1231:
1223:
1222:
1217:
1212:
1207:
1202:
1197:
1192:
1187:
1182:
1177:
1172:
1167:
1165:MalargĂĽe Group
1162:
1152:
1151:
1146:
1145:
1129:
1097:
1076:(2): 183–197.
1056:
1019:
1006:(2): 269–288.
986:
960:
945:
937:Roca Formation
928:
927:
925:
922:
921:
920:
912:
902:
897:
896:
895:
885:
880:
879:
878:
870:
860:
855:
854:
853:
847:
839:
831:
826:
824:
823:
815:
807:
799:
787:
779:
771:
763:
755:
747:
739:
731:
723:
715:
707:
698:
696:
691:
650:
649:Fossil content
647:
578:
575:
536:Atlantic Ocean
528:MalargĂĽe Group
462:Roca Formation
456:
455:
449:
440:
439:
431:
430:
422:
421:
413:
412:
404:
403:
397:
396:
395:
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385:
381:
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375:
370:
366:
365:
352:
348:
347:
330:
326:
325:
293:
287:
286:
254:
248:
247:
243:
242:
237:
233:
232:
219:
215:
214:
210:
209:
206:
202:
201:
196:
192:
191:
182:
178:
177:
174:
170:
169:
167:MalargĂĽe Group
164:
160:
159:
154:
150:
149:
138:
130:
129:
122:
121:
120:
115:
110:
105:
100:
95:
90:
85:
80:
75:
70:
65:
60:
59:
31:
30:
29:Roca Formation
21:Roca Formation
15:
13:
10:
9:
6:
4:
3:
2:
1232:
1221:
1218:
1216:
1213:
1211:
1208:
1206:
1203:
1201:
1198:
1196:
1193:
1191:
1188:
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1173:
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1168:
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1134:
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1125:
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1117:
1113:
1106:
1104:
1102:
1098:
1092:
1087:
1083:
1079:
1075:
1071:
1070:Fossil Record
1067:
1060:
1057:
1051:
1046:
1042:
1038:
1034:
1026:
1024:
1020:
1014:
1009:
1005:
1001:
997:
990:
987:
982:
978:
974:
967:
965:
961:
956:
949:
946:
942:
938:
933:
930:
923:
918:
917:
913:
910:
909:
905:
904:
901:
898:
893:
892:
888:
887:
884:
881:
876:
875:
871:
868:
867:
863:
862:
859:
856:
851:
848:
845:
844:
840:
837:
834:
833:
830:
827:
821:
820:
816:
813:
812:
808:
805:
804:
800:
797:
793:
792:
788:
785:
784:
780:
777:
776:
772:
769:
768:
764:
761:
760:
756:
753:
752:
748:
745:
744:
740:
737:
736:
732:
729:
728:
724:
721:
720:
716:
713:
712:
708:
705:
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700:
699:
695:
692:
690:
688:
684:
680:
676:
672:
668:
664:
655:
648:
646:
644:
643:Pacific Ocean
640:
636:
632:
628:
623:
621:
617:
612:
608:
604:
600:
596:
592:
588:
584:
576:
574:
572:
568:
567:type locality
564:
560:
556:
552:
543:
539:
537:
533:
532:transgression
529:
525:
522:
518:
514:
510:
506:
502:
501:Maastrichtian
498:
494:
490:
486:
482:
478:
477:Neuquén Basin
474:
471:
467:
463:
401:
392:
389:
386:
382:
377:
374:
373:Neuquén Basin
371:
367:
364:
353:
349:
346:
342:
338:
334:
331:
327:
322:
313:41.5°S 56.0°W
294:
292:
288:
283:
274:38.9°S 67.6°W
255:
253:
249:
244:
241:
238:
234:
231:
227:
223:
220:
216:
211:
207:
203:
200:
197:
193:
190:
186:
183:
179:
175:
171:
168:
165:
161:
158:
155:
151:
146:
142:
136:
131:
118:
113:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
57:
48:
44:
40:
39:Maastrichtian
36:
32:
27:
22:
1190:Danian Stage
1140:
1115:
1073:
1069:
1059:
1032:
1003:
999:
989:
980:
976:
954:
948:
932:
914:
906:
889:
872:
864:
849:
841:
835:
817:
811:V. feruglioi
809:
801:
795:
789:
781:
773:
765:
757:
749:
741:
733:
725:
717:
714:CasadĂo 1998
709:
701:
687:nanoplankton
683:foraminifera
660:
624:
580:
559:Horno de Cal
558:
555:General Roca
548:
513:unconformity
461:
459:
388:General Roca
379:Type section
318:-41.5; -56.0
279:-38.9; -67.6
145:General Roca
1141:Ameghiniana
1050:11336/68472
941:Fossilworks
836:"Aporrhais"
633:during the
497:diachronous
316: /
277: /
252:Coordinates
147:, RĂo Negro
141:Barda Norte
54:68–63
43:late Danian
1154:Categories
957:. Neuquén.
924:References
858:Nautoloids
829:Gastropods
794:Ihering (=
667:gastropods
595:claystones
587:wackestone
583:limestones
551:stratotype
515:due to an
466:Cretaceous
185:El Carrizo
1124:0328-2333
911:Oppenheim
900:Echinoida
869:(Ihering)
822:(Ihering)
786:(Ihering)
762:(Sowerby)
746:(Ihering)
722:(Ihering)
679:ostracods
671:bryozoans
627:Argentina
591:packstone
577:Lithology
563:lime kiln
534:from the
521:Oligocene
481:RĂo Negro
470:Paleogene
384:Named for
363:Argentina
333:RĂo Negro
230:siltstone
226:claystone
222:Limestone
213:Lithology
205:Thickness
181:Underlies
176:3 members
173:Sub-units
47:Tiupampan
983:: 10–15.
883:Decapods
814:Petersen
694:Bivalves
663:bivalves
635:Jurassic
524:orogenic
489:La Pampa
341:La Pampa
246:Location
195:Overlies
1116:Boletin
1078:Bibcode
852:Ihering
846:Ihering
806:(Boehm)
778:Ihering
770:Ihering
754:Ihering
738:Ihering
730:Ihering
706:(Boehm)
603:calcite
493:Mendoza
485:Neuquén
351:Country
337:Neuquén
304:56°00′W
301:41°30′S
265:67°36′W
262:38°54′S
218:Primary
163:Unit of
123:↓
1122:
877:Masiuk
616:gypsum
611:strata
607:quartz
517:Eocene
505:Danian
491:, and
369:Extent
360:
343:&
329:Region
240:Gypsum
187:&
894:Boehm
631:Chile
601:with
571:marls
464:is a
236:Other
45:(pre-
1120:ISSN
943:.org
919:Parm
838:spp.
637:and
629:and
605:and
589:and
549:The
519:and
460:The
153:Type
62:Preęž’
1086:doi
1045:hdl
1037:doi
1008:doi
1004:103
939:at
468:to
1156::
1132:^
1114:.
1100:^
1084:.
1072:.
1068:.
1043:.
1022:^
1002:.
998:.
979:.
975:.
963:^
681:,
677:,
673:,
669:,
665:,
645:.
487:,
483:,
339:,
335:,
228:,
224:,
143:,
112:Pg
56:Ma
37::
1126:.
1094:.
1088::
1080::
1074:9
1053:.
1047::
1039::
1016:.
1010::
981:7
798:)
561:(
117:N
107:K
102:J
97:T
92:P
87:C
82:D
77:S
72:O
67:ęž’
51:~
49:)
41:-
23:.
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