問題一覧
1
Eon of Paleozoic Era
Phanerozoic Eon
2
Eon of Cenozoic Era
Phanerozoic Eon
3
Eon of Mesozoic Era
Phanerozoic Eon
4
Era of Quaternary Period
Cenozoic Era
5
Era of Tertiary Period
Cenozoic Era
6
Era of Cretaceous Period
Mesozoic Era
7
Era of Jurassic Period
Mesozoic Era
8
Era of Triassic Period
Mesozoic Era
9
Era of Permian Period
Paleozoic Era
10
Era of Carboniferous Period
Paleozoic Era
11
Era of Devonian Period
Paleozoic Era
12
Era of Silurian Period
Paleozoic Era
13
Era of Ordovician Period
Paleozoic Era
14
Era of Cambrian Period
Paleozoic Era
15
Era of Proterozoic and Archean Periods
Precambrian Era
16
Period of Holocene Epoch
Quaternary Period
17
Period of Pleistocene Epoch
Quaternary Period
18
Period of Pliocene Epoch
Tertiary Period
19
Period of Miocene Epoch
Tertiary Period
20
Period of Oligocene Epoch
Tertiary Period
21
Period of Eocene Epoch
Tertiary Period
22
Period of Paleocene Epoch
Tertiary Period