324:
331:
296:
396:, about 150 metres (490 ft) in thickness. The formation is resistant to erosion and is largely barren, but at a few places there are lenses or interbeds filled with finely preserved fossils. The formation overlies the
461:
484:"Neogene Tonnoidean Gastropods of Tropical and South America; contributions to the Dominican Republic and Panama Paleontology Projects and Uplift of the Central American Isthmus"
437:
323:
580:
530:
525:
17:
488:
575:
570:
365:
248:
209:
565:
202:
535:
506:-group (Gastropoda; Columbellidae), fossil and living. Schweierische Paläontologische Abhandlungen 111:1-298
560:
393:
190:
127:
137:
369:
283:
373:
311:
550:
545:
540:
405:
401:
147:
555:
397:
157:
241:
519:
483:
361:
84:
44:
31:
512:
E. H. Vokes and H. E. Vokes. 2000. Catalogue of Tulane
University fossil localities.
353:
35:
465:
59:
104:
69:
263:
250:
224:
211:
425:
389:
180:
109:
53:
99:
94:
79:
74:
64:
421:
377:
301:
114:
89:
409:
357:
40:
404:. The Angostura Formation is time-equivalent with the fossiliferous
509:
A. A. Olsson. 1964. Neogene
Mollusks From Northwestern Ecuador
438:
List of fossiliferous stratigraphic units in
Ecuador
330:
307:
289:
279:
240:
201:
196:
186:
176:
171:
163:
153:
143:
133:
123:
25:
8:
457:
455:
453:
22:
449:
338:Angostura Formation, Ecuador (Ecuador)
7:
489:Bulletins of American Paleontology
14:
581:Geography of Esmeraldas Province
329:
322:
294:
531:Miocene Series of South America
502:P. Jung. 1989. Revision of the
400:, and is overlain by the lower
526:Geologic formations of Ecuador
1:
242:Approximate paleocoordinates
420:The formation has provided
597:
15:
317:
30:
167:150 m (490 ft)
576:Shallow marine deposits
571:Conglomerate formations
566:Sandstone formations
366:SALMA classification
128:Geological formation
16:For other uses, see
462:Angostura Formation
350:Angostura Formation
284:Esmeraldas Province
260: /
221: /
32:Stratigraphic range
26:Angostura Formation
18:Angostura Formation
482:Beu, A.G (2010),
346:
345:
588:
499:
498:
497:
492:, 377–378: 1–550
469:
459:
402:Onzole Formation
376:in northwestern
333:
332:
326:
300:
298:
297:
275:
274:
272:
271:
270:
265:
261:
258:
257:
256:
253:
236:
235:
233:
232:
231:
226:
222:
219:
218:
217:
214:
148:Onzole Formation
119:
56:
23:
596:
595:
591:
590:
589:
587:
586:
585:
536:Neogene Ecuador
516:
515:
495:
493:
481:
478:
476:Further reading
473:
472:
460:
451:
446:
434:
418:
406:Gatún Formation
398:Viche Formation
386:
342:
341:
340:
339:
336:
335:
334:
295:
293:
268:
266:
262:
259:
254:
251:
249:
247:
246:
229:
227:
223:
220:
215:
212:
210:
208:
207:
158:Viche Formation
118:
117:
112:
107:
102:
97:
92:
87:
82:
77:
72:
67:
62:
51:
50:
48:
38:
21:
12:
11:
5:
594:
592:
584:
583:
578:
573:
568:
563:
558:
553:
548:
543:
538:
533:
528:
518:
517:
514:
513:
510:
507:
500:
477:
474:
471:
470:
448:
447:
445:
442:
441:
440:
433:
430:
417:
416:Fossil content
414:
385:
382:
344:
343:
337:
328:
327:
321:
320:
319:
318:
315:
314:
309:
305:
304:
291:
287:
286:
281:
277:
276:
244:
238:
237:
205:
199:
198:
194:
193:
188:
184:
183:
178:
174:
173:
169:
168:
165:
161:
160:
155:
151:
150:
145:
141:
140:
138:Santiago Group
135:
131:
130:
125:
121:
120:
113:
108:
103:
98:
93:
88:
83:
78:
73:
68:
63:
58:
57:
52:11.6–5.3
28:
27:
13:
10:
9:
6:
4:
3:
2:
593:
582:
579:
577:
574:
572:
569:
567:
564:
562:
561:Montehermosan
559:
557:
554:
552:
549:
547:
544:
542:
539:
537:
534:
532:
529:
527:
524:
523:
521:
511:
508:
505:
501:
491:
490:
485:
480:
479:
475:
467:
463:
458:
456:
454:
450:
443:
439:
436:
435:
431:
429:
427:
423:
415:
413:
411:
407:
403:
399:
395:
394:conglomerates
391:
383:
381:
379:
375:
371:
367:
363:
362:Montehermosan
359:
355:
351:
325:
316:
313:
310:
306:
303:
292:
288:
285:
282:
278:
273:
245:
243:
239:
234:
206:
204:
200:
195:
192:
189:
185:
182:
179:
175:
170:
166:
162:
159:
156:
152:
149:
146:
142:
139:
136:
132:
129:
126:
122:
116:
111:
106:
101:
96:
91:
86:
81:
76:
71:
66:
61:
55:
46:
45:Montehermosan
42:
37:
33:
29:
24:
19:
503:
494:, retrieved
487:
419:
392:and beds of
387:
374:Borbón Basin
354:Late Miocene
349:
347:
312:Borbón Basin
264:0.6°N 78.0°W
225:1.0°N 79.6°W
191:Conglomerate
36:Late Miocene
466:Fossilworks
388:The coarse
384:Description
368:) geologic
267: /
228: /
203:Coordinates
520:Categories
496:2019-02-09
444:References
390:sandstones
269:0.6; -78.0
230:1.0; -79.6
551:Chasicoan
546:Tortonian
541:Messinian
504:Strombina
428:fossils.
426:gastropod
370:formation
181:Sandstone
172:Lithology
164:Thickness
144:Underlies
432:See also
197:Location
154:Overlies
422:bivalve
378:Ecuador
372:of the
364:in the
302:Ecuador
290:Country
255:78°00′W
216:79°36′W
177:Primary
134:Unit of
556:Mayoan
410:Panama
358:Mayoan
308:Extent
299:
280:Region
252:0°36′N
213:1°00′N
41:Mayoan
352:is a
187:Other
468:.org
424:and
348:The
124:Type
60:PreꞒ
464:at
408:of
360:to
522::
486:,
452:^
412:.
380:.
110:Pg
54:Ma
34::
356:(
115:N
105:K
100:J
95:T
90:P
85:C
80:D
75:S
70:O
65:Ꞓ
49:~
47:)
43:-
39:(
20:.
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