73:
late Early
Hemphillian: Lower boundary source of the base of the Hemphillian (approximate). Upper boundary source: base of Blancan (approximate).
239:
383:
378:
123:
93:
232:
32:
116:
225:
109:
368:
363:
358:
70:
Late/Upper
Hemphillian: Lower boundary source of the base of the Hemphillian (approximate).
8:
281:
160:
24:
16:
North
American faunal stage according to the North American Land Mammal Ages chronology
373:
322:
276:
286:
52:
36:
76:
early Early
Hemphillian: Upper boundary source: base of Blancan (approximate).
352:
302:
317:
307:
175:
56:
44:
28:
332:
261:
165:
297:
248:
201:
327:
312:
185:
180:
40:
35:
chronology (NALMA), typically set from 10,300,000 to 4,900,000 years
217:
266:
196:
170:
150:
48:
145:
132:
101:
60:
66:
The
Hemphillian can be further divided into the substages of:
350:
233:
117:
240:
226:
124:
110:
39:. It is usually considered to overlap the
351:
247:
221:
105:
55:. The Hemphillian is preceded by the
13:
131:
94:Paleobiology Database, Hemphillian
14:
395:
384:Pliocene animals of North America
379:Miocene animals of North America
21:Hemphillian North American Stage
33:North American Land Mammal Ages
87:
1:
80:
7:
10:
400:
255:
139:
27:is a North American
59:and followed by the
25:geologic timescale
346:
345:
341:
340:
262:Pleistocene Epoch
249:Quaternary Period
215:
214:
210:
209:
31:according to the
391:
258:
257:
242:
235:
228:
219:
218:
142:
141:
126:
119:
112:
103:
102:
96:
91:
399:
398:
394:
393:
392:
390:
389:
388:
349:
348:
347:
342:
337:
291:
251:
246:
216:
211:
206:
190:
135:
130:
100:
99:
92:
88:
83:
17:
12:
11:
5:
397:
387:
386:
381:
376:
371:
366:
361:
344:
343:
339:
338:
336:
335:
330:
325:
320:
315:
310:
305:
300:
294:
292:
290:
289:
284:
279:
273:
270:
269:
267:Holocene Epoch
264:
256:
253:
252:
245:
244:
237:
230:
222:
213:
212:
208:
207:
205:
204:
199:
193:
191:
189:
188:
183:
178:
173:
168:
163:
157:
154:
153:
151:Pliocene Epoch
148:
140:
137:
136:
133:Neogene Period
129:
128:
121:
114:
106:
98:
97:
85:
84:
82:
79:
78:
77:
74:
71:
63:NALMA stages.
53:Early Pliocene
15:
9:
6:
4:
3:
2:
396:
385:
382:
380:
377:
375:
372:
370:
369:Pliocene life
367:
365:
362:
360:
357:
356:
354:
334:
331:
329:
326:
324:
321:
319:
316:
314:
311:
309:
306:
304:
303:Northgrippian
301:
299:
296:
295:
293:
288:
285:
283:
280:
278:
275:
274:
272:
271:
268:
265:
263:
260:
259:
254:
250:
243:
238:
236:
231:
229:
224:
223:
220:
203:
200:
198:
195:
194:
192:
187:
184:
182:
179:
177:
174:
172:
169:
167:
164:
162:
159:
158:
156:
155:
152:
149:
147:
146:Miocene Epoch
144:
143:
138:
134:
127:
122:
120:
115:
113:
108:
107:
104:
95:
90:
86:
75:
72:
69:
68:
67:
64:
62:
58:
54:
50:
46:
42:
38:
34:
30:
26:
22:
364:Miocene life
308:Greenlandian
176:Serravallian
89:
65:
57:Clarendonian
45:Late Miocene
29:faunal stage
20:
18:
359:Hemphillian
333:Subatlantic
166:Burdigalian
51:age of the
43:age of the
353:Categories
298:Meghalayan
202:Piacenzian
161:Aquitanian
81:References
328:Subboreal
313:Preboreal
186:Messinian
181:Tortonian
41:Tortonian
374:Zanclean
323:Atlantic
197:Zanclean
171:Langhian
49:Zanclean
61:Blancan
23:on the
318:Boreal
282:Middle
277:Early
287:Late
47:and
19:The
355::
37:BP
241:e
234:t
227:v
125:e
118:t
111:v
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