| Cambrian to Ordovician |
9143 |
| Jurassic to Early Cretaceous |
5750 |
| Early Jurassic to Miocene |
5449 |
| Late Jurassic or Cretaceous to Neogene |
4701 |
| unknown |
4125 |
| Mesoproterozoic |
3757 |
| Quaternary |
3525 |
| Carboniferous to Permian, Early Jurassic-Early Cretaceous |
3428 |
| inapplicable |
3383 |
| Early Jurassic |
3362 |
| Cambrian |
3241 |
| Holocene |
3202 |
| Neoproterozoic to early Cambrian |
3167 |
| Early Jurassic to Creatceous |
3120 |
| Jurassic |
2967 |
| unknown, younger than Silurian |
2826 |
| Neoproterozoic |
2817 |
| Miocene(?) to Quaternary |
2054 |
| Carboniferous to Triassic |
1787 |
| Late Jurassic to Cretaceous |
1560 |
| Permian |
1462 |
| late Cambrian to Devonian |
1444 |
| Archean |
1381 |
| Proterozoic |
1166 |
| Devonian |
1086 |
| Cenozoic |
1061 |
| Neoproterozoic to Ordovician |
998 |
| Devonian to Jurassic |
992 |
| Paleoproterozoic |
922 |
| Late Jurassic to Early Cretaceous |
880 |
| Middle Jurassic |
817 |
| Mesoproterozoic to Neoproterozoic |
782 |
| Miocene to Quaternary |
762 |
| Permian to Triassic |
759 |
| Cretaceous |
735 |
| Late Cretaceous to Eocene |
647 |
| Neoproterozoic to Cambrian |
606 |
| Triassic |
588 |
| middle Cambrian to late Cambrian |
557 |
| Miocene |
488 |
| Permian to Early Jurassic |
432 |
| Early to Middle Devonian |
411 |
| Late Archaean |
391 |
| Eocene |
381 |
| Late Miocene to Quaternary |
351 |
| Paleocene to Early Miocene |
350 |
| Eoachean |
301 |
| Late Jurassic |
287 |
| Neoproterozoic to Early Ordovician |
284 |
| middle Cambrian |
280 |
| Tonian |
270 |
| Devonian to Carboniferous |
237 |
| Carboniferous to Permian |
215 |
| Precambrian |
210 |
| late Cambrian to Early Ordovician |
198 |
| Middle to Late Jurassic |
186 |
| Middle Devonian |
185 |
| Paleozoic to Triassic |
137 |
| Late Cretaceous to Paleocene |
131 |
| late Cambrian |
123 |
| Neoproterozoic to Mesoproterozoic |
121 |
| Archean to Mesoproterozoic |
119 |
| Proterozoic to Cambrian |
116 |
| Ordovician to Devonian |
109 |
| Jurassic to Cretaceous |
93 |
| early Cambrian |
89 |
| Paleoproterozoic to Ordovician |
82 |
| Late Cretaceous |
81 |
| Ordovician to Carboniferous |
79 |
| Archean to Paleoproterozoic |
78 |
| Paleozoic |
78 |
| Archaean |
75 |
| Late Miocene to Pliocene or Pleistocene |
73 |
| Early Devonian |
72 |
| Paleoproterozoic to Mesoproterozoic |
70 |
| Late Archaean to Palaeoproterozoic |
65 |
| Middle to Late Triassic |
63 |
| Jurassic to Neogene |
62 |
| Pliocene to Holocene |
60 |
| Cambrian-?Early Ordovician |
56 |
| Early Triassic |
49 |
| Cambrian to Early Ordovician |
47 |
| Middle to Late Miocene |
43 |
| Early Cretaceous |
41 |
| Early Miocene? to Middle Miocene |
39 |
| Late Miocene |
37 |
| Early Pliocene |
35 |
| Late Proterozoic to Early Ordovician |
34 |
| Oligocene(?) to Quaternary(?) |
32 |
| Pliocene |
24 |
| Pliocene to Quaternary |
22 |
| Silurian to Devonian |
21 |
| Early Jurassic to Early Cretaceous |
20 |
| Mesozoic |
20 |
| Miocene to Pliocene |
13 |
| Devonian to Triassic |
12 |
| Late Pliocene |
12 |
| Late Triassic |
11 |
| Middle Miocene to Pliocene |
11 |
| Triassic to Jurassic |
10 |
| Early Paleozoic |
9 |
| Early Ordovician |
8 |
| Oligocene |
6 |
| Late Pliocene to Quaternary |
5 |
| Early to Middle Jurassic |
4 |
| Late Miocene to Early Pliocene |
4 |
| Proterozoic to Ordovician |
3 |
| Carboniferous |
2 |
| Early Miocene to Middle Miocene |
2 |
| Middle Miocene |
2 |
| Miocene to Early Pliocene |
2 |
| Paleocene to early Oligocene |
2 |