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Prehistoric Time Periods
MYA1 Harland at al. 1990
MYA2 Gradstein et al. 1995
MYA3 Gradstein et al 2004 ICS (International
Commission on Stratigraphy)
|
SUB-PERIOD |
AGE |
MYA1 |
MYA2 |
ERROR |
MYA3 |
ERROR |
|
Triassic Late |
Carnian |
235 223.4 |
227 220.7 |
4.4 |
228-216.5 |
2.0 |
| |
Norian |
223.4 209.5 |
220.7 209.6 |
4.1 |
216.5-203.6 |
2.0 |
| |
Rhaetian |
209.5 208 |
209.6 205.7 |
4.0 |
203.6-199.6 |
1.5 |
|
Jurassic Early |
Hettangian |
208 203.5 |
205.7 201.9 |
3.9 |
199.6-196.5 |
0.6 |
| |
Sinemurian |
203.5 194.5 |
201.9 195.3 |
3.9 |
196.5-189.6 |
1.0 |
| |
Pliensbachian |
194.5 187 |
195.3 189.6 |
4.0 |
189.6-183 |
1.5 |
| |
Toarcian |
187 178 |
189.6 180.1 |
4.0 |
183-175.6 |
1.5 |
|
Jurassic Middle |
Aalenian |
178 173.5 |
180.1 176.5 |
4.0 |
175.6-171.6 |
2.0 |
| |
Bajocian |
173.5 166.1 |
176.5 169.2 |
4.0 |
171.6-167.7 |
3.0 |
| |
Bathonian |
166.1 161.3 |
169.2 164.4 |
3.8 |
167.7-164.7 |
3.5 |
| |
Callovian |
161.3 157.1 |
164.4 159.4 |
3.6 |
164.7-161.2 |
4.0 |
|
Jurassic Late |
Oxfordian |
157.1 154.7 |
159.4 154.1 |
3.2 |
161.2-155 |
4.0 |
| |
Kimmeridgian |
154.7 152.1 |
154.1 150.7 |
3.0 |
155-150.8 |
4.0 |
| |
Tithonian |
152.1 145.6 |
150.7 144.2 |
2.6 |
150.8-145.5 |
4.0 |
|
Cretaceous Early |
Berriasian |
145.6 140.7 |
144.2 137.0 |
2.2 |
145.5-140.2 |
4.0 |
| |
Valanginian |
140.7 135 |
137.0 132.0 |
1.9 |
140.2-136.4 |
3.0 |
| |
Hauterivian |
135 131.8 |
132.0 127.0 |
1.6 |
136.4-130 |
2.0 |
| |
Barremian |
131.8 124.5 |
127.0 121.0 |
1.4 |
130-125 |
1.5 |
| |
Aptian |
124.5 112 |
121.0 112.2 |
1.1 |
125-112 |
1.0 |
| |
Albian |
112 97 |
112.2 98.9 |
0.6 |
112-99.6 |
1.0 |
|
Cretaceous Late |
Cenomanian |
97 90.4 |
98.9 93.5 |
0.2 |
99.6-93.5 |
0.9 |
| |
Turonian |
90.4 88.5 |
93.5 89.9 |
0.5 |
93.5-89.3 |
0.8 |
| |
Coniacian |
88.5 86.6 |
89.9 85.8 |
0.5 |
89.3-85.5 |
1.0 |
| |
Santonian |
86.6 83 |
85.8 83.5 |
0.5 |
85.5-83.5 |
0.7 |
| |
Campanian |
83 74 |
83.5 71.0 |
0.5 |
83.5-70.6 |
0.7 |
| |
Maastrichtian |
74 65 |
71.0 65.0 |
0.1 |
70.6-65.5 |
0.6 - 0.3 |
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