Era
Early works to 1800
4,115
20th century
2,314
19th century
2,027
Cretaceous
1,730
1809-1882
1,217
1879-1955
1,047
Tertiary
1,011
Quaternary
1,007
18th century
994
17th century
906
Paleozoic
906
Devonian
864
Precambrian
842
Pleistocene
821
Ordovician
732
1900-1999
720
20e siècle
671
1564-1642
653
1642-1727
601
Cenozoic
593
Permian
579
Eocene
578
Miocene
552
Mesozoic
539
Jurassic
525
1800-1899
523
19e siècle
523
Pennsylvanian
520
Silurian
478
Cambrian
465
Crétacé
462
Carboniferous
461
Triassic
457
Mississippian
394
From 65 to 140 million years ago
388
1473-1543
360
1961-
340
16th century
308
Holocene
295
1769-1859
275
Tertiaire
274
Pliocene
263
18e siècle
259
To 1500
253
Oligocene
252
Dévonien
250
Paléozoïque
249
Quaternaire
249
From 2 million years ago
247
Proterozoic
245
more ...