The Geologic Ages of Earth History
|
Era |
Period |
Sub-period |
Epoch |
Age |
Ma |
Intervals, My |
|
|
|
|
Holocene |
0.01 |
0.01 |
|
|
|
Quaternary |
Pleistocene |
1.64 |
1.63 |
|
|
|
|
|
|
Piacenzian |
3.4 |
|
|
|
|
|
|
Pliocene |
Zanclian |
5.2 |
3.6 |
|
|
|
|
|
|
Messinian |
6.7 |
|
|
|
|
|
|
|
Tortonian |
10.4 |
5.2 |
|
|
|
|
|
|
Serravallian |
14.2 |
|
|
|
|
|
|
|
Langhian |
16.3 |
5.9 |
|
|
|
|
|
|
Burdigalian |
21.5 |
|
|
|
|
|
Neogene |
Miocene |
Aquitanian |
23.3 |
7 |
22 |
|
|
|
|
|
Chattian |
29.3 |
6 |
|
|
|
|
|
Oligocene |
Rupelian |
35.4 |
6.1 |
|
|
|
|
|
|
Priabonian |
38.6 |
3.2 |
|
|
|
|
|
|
Bartonian |
42.1 |
|
|
|
|
|
|
|
Lutetian |
50 |
11.4 |
|
|
|
|
|
Eocene |
Ypresian |
56.5 |
6.5 |
|
|
|
|
|
|
Thanetian |
60.5 |
4 |
|
|
Cenozoic |
Tertiary |
Paleogene |
Paleocene |
Danian |
65 |
4.5 |
42 |
|
|
|
|
|
Maastrichtian |
71.3 |
6.3 |
|
|
|
|
|
|
Campanian |
83.5 |
12.2 |
|
|
|
|
|
|
Santonian |
85.8 |
2.3 |
|
|
|
|
|
Senonian |
Coniacian |
89.9 |
4.1 |
|
|
|
|
|
|
Turonian |
93.5 |
3.6 |
|
|
|
|
|
|
Cenomanian |
98.9 |
5.4 |
|
|
|
|
|
|
Albian |
112.2 |
13.3 |
|
|
|
|
|
|
Aptian |
121 |
8.8 |
|
|
|
|
|
Gallic |
Barremian |
127 |
6 |
|
|
|
|
|
|
Hauterivian |
132 |
5 |
|
|
|
|
|
|
Valanginian |
137 |
5 |
|
|
|
Cretaceous |
Neocomian |
Berriasian |
144.2 |
7.2 |
79.2 |
|
|
|
|
|
Tithonian |
150.7 |
6.5 |
|
|
|
|
|
|
Kimmeridgian |
154.1 |
3.4 |
|
|
|
|
|
Malm |
Oxfordian |
159.4 |
5.3 |
|
|
|
|
|
|
Callovian |
164.4 |
5 |
|
|
|
|
|
|
Bathonian |
169.2 |
4.8 |
|
|
|
|
|
|
Bajocian |
176.5 |
7.3 |
|
|
|
|
|
Dogger |
Aalenian |
180.1 |
3.6 |
|
|
|
|
|
|
Toarcian |
189.6 |
9.5 |
|
|
|
|
|
|
Pliensbachian |
195.3 |
5.7 |
|
|
|
|
|
|
Sinemurian |
201.9 |
6.6 |
|
|
|
Jurassic |
Lias |
Hettangian |
205.7 |
3.8 |
61.5 |
|
|
|
|
|
Rhaetian |
209.6 |
3.9 |
|
|
|
|
|
|
Norian |
220.7 |
11.1 |
|
|
|
|
|
Tr3 |
Carnian |
227.4 |
6.7 |
|
|
|
|
|
|
Ladinian |
234.3 |
6.9 |
|
|
|
|
|
Tr2 |
Anisian |
241.7 |
7.4 |
|
|
|
|
|
|
Spathian |
241.9 |
0.2 |
|
|
|
|
|
|
Nammalian |
243.4 |
1.5 |
|
|
Mesozoic |
Triassic |
Scythian |
Griesbachian |
248.2 |
4.8 |
42.5 |
|
|
|
|
|
Changxingian |
247.5 |
2.5 |
|
|
|
|
|
|
Longtanian |
250 |
2.5 |
|
|
|
|
|
|
Capitanian |
252.5 |
2.5 |
|
|
|
|
|
|
Wordian |
255 |
2.5 |
|
|
|
|
|
Zechstein |
Ufimian |
256.1 |
1.1 |
|
|
|
|
|
|
Kingurian |
259.7 |
3.6 |
|
|
|
|
|
|
Artinskian |
268.8 |
9.1 |
|
|
|
|
|
|
Sakmarian |
281.5 |
12.7 |
|
|
|
Permian |
Rotliegendes |
Asselian |
290 |
8.5 |
45 |
|
|
|
|
|
Noginskian |
293.6 |
3.6 |
|
|
|
|
|
Gzelian |
Klazminskian |
295.1 |
1.5 |
|
|
|
|
|
|
Dorogomilovskian |
298.3 |
3.2 |
|
|
|
|
|
|
Chamovnicheskian |
299.9 |
1.6 |
|
|
|
|
|
Kasimovian |
Krevyakinskian |
303 |
3.1 |
|
|
|
|
|
|
Myachkovskian |
305 |
2 |
|
|
|
|
|
|
Podolskian |
307.1 |
2.1 |
|
|
|
|
|
|
Kashirskian |
309.2 |
2.1 |
|
|
|
|
|
Moscovian |
Vereiskian |
311.3 |
2.1 |
|
|
|
|
|
|
Melekesskian |
313.4 |
2.1 |
|
|
|
|
|
|
Cheremshanskian |
318.3 |
4.9 |
|
|
|
|
|
|
Yeadonian |
320.6 |
2.3 |
|
|
|
|
|
|
Marsdenian |
321.5 |
0.9 |
|
|
|
|
Pennsylvanian |
Bashkirian |
Kinderscoutian |
322.8 |
1.3 |
33 |
|
|
|
|
|
Alportian |
325.6 |
2.8 |
|
|
|
|
|
|
Chokierian |
328.3 |
2.7 |
|
|
|
|
|
|
Arnsbergian |
331.1 |
|
|
|
|
|
|
Serpukhovian |
Pendleian |
332.9 |
4.5 |
|
|
|
|
|
|
Brigantian |
336 |
|
|
|
|
|
|
|
Asbian |
339.4 |
|
|
|
|
|
|
|
Holkerian |
342.8 |
|
|
|
|
|
|
|
Arundian |
345 |
|
|
|
|
|
|
Visean |
Chadian |
349.5 |
17 |
|
|
|
|
|
|
Ivorian |
353.8 |
|
|
|
|
Carboniferous |
Mississippian |
Tournaisian |
Hastarian |
362.5 |
13 |
40 |
|
|
|
|
|
Famennian |
367 |
|
|
|
|
|
|
D3 |
Frasnian |
377.4 |
15 |
|
|
|
|
|
|
Givetian |
380.8 |
|
|
|
|
|
|
D2 |
Eifelian |
386 |
9 |
|
|
|
|
|
|
Emsian |
390.4 |
|
|
|
|
|
|
|
Prgian |
396.3 |
|
|
|
|
Devonian |
D1 |
Lochkovian |
408.5 |
22 |
46 |
|
|
|
|
Pridoli |
|
410.7 |
2 |
|
|
|
|
|
|
Ludfordian |
415.1 |
|
|
|
|
|
|
Ludlow |
Gorstian |
424 |
13 |
|
|
|
|
|
|
Gleedonian |
425.4 |
|
|
|
|
|
|
|
Whitwellian |
426.1 |
|
|
|
|
|
|
Wenlock |
Sheinwoodian |
430.4 |
6.5 |
|
|
|
|
|
|
Telychian |
432.6 |
|
|
|
|
|
|
|
Aeronian |
436.9 |
|
|
|
|
Silurian |
Llandovery |
Rhuddanian |
439 |
8.5 |
31 |
|
|
|
|
|
Hirnantian |
439.5 |
|
|
|
|
|
|
|
Rawtheyan |
440.1 |
|
|
|
|
|
|
|
Cautleyan |
440.6 |
|
|
|
|
|
|
Ashgill |
Pusgillian |
443.1 |
4 |
|
|
|
|
|
|
Onnian |
444 |
|
|
|
|
|
|
|
Actonian |
444.5 |
|
|
|
|
|
|
|
Marshbrookian |
447.1 |
|
|
|
|
|
|
|
Longvillian |
449.7 |
|
|
|
|
|
|
|
Soudleyan |
457.5 |
|
|
|
|
|
|
|
Harnagian |
462.3 |
|
|
|
|
|
Bala |
Caradoc |
Costonian |
463.9 |
21 |
|
|
|
|
|
|
Late |
465.4 |
|
|
|
|
|
|
|
Mid |
467 |
|
|
|
|
|
|
Llandeilo |
Early |
468.6 |
4.5 |
|
|
|
|
|
|
Late |
472.7 |
|
|
|
|
|
Dyfed |
Llanvirn |
Early |
476.1 |
7.5 |
|
|
|
|
|
Arenig |
|
493 |
17 |
|
|
|
Ordovician |
Canadian |
Tremadoc |
|
510 |
17 |
71 |
|
|
|
|
|
Dolgellian |
514.1 |
|
|
|
|
|
|
Merioneth |
Maentwrogian |
517.2 |
7 |
|
|
|
|
|
|
Menevian |
530.2 |
|
|
|
|
|
|
St David's |
Solvan |
536 |
19 |
|
|
|
|
|
|
Lenian |
554 |
18 |
|
|
|
|
|
|
Atdabanian |
560 |
|
|
|
Paleozoic |
Cambrian |
Caerfai |
Tommotian |
570 |
16 |
60 |
|
|
|
|
|
Poundian |
580 |
|
|
|
|
|
|
Ediacara |
Wonokan |
590 |
20 |
|
|
|
|
|
|
Mortensnes |
600 |
|
|
|
|
Vendian |
Varanger |
Smalfjord |
610 |
20 |
40 |
|
Sinian |
Sturtian |
800 |
190 |
|
|
|
|
|
Karatau |
1050 |
250 |
|
|
|
|
|
Yurmatin |
1350 |
300 |
|
|
Riphean |
Burzyan |
1650 |
300 |
|
|
Animikean |
2200 |
550 |
|
|
Huronian |
2450 |
250 |
|
|
Randian |
2800 |
350 |
|
|
Swazian |
3500 |
700 |
|
|
Isuan |
3800 |
300 |
|
|
|
|
|
Early Imbrian |
3850 |
50 |
|
|
|
|
|
Nectarian |
3950 |
100 |
|
|
|
|
|
Basin Groups 1-9 |
4150 |
200 |
|
|
Hadean |
Cryptic |
4560 |
410 |
|
Last Updated on 10/16/99
By Scott L. Schofield