|
gptkb:Mechanical_Age
|
mid 20th century
|
|
gptkb:Marinoan_glaciation
|
635 million years ago
|
|
gptkb:Sangamonian_in_North_America
|
about 75,000 years ago
|
|
gptkb:Age_of_Pisces
|
gptkb:2000_AD
|
|
gptkb:Mesolithic_(late_Pleistocene)
|
c. 5,000 BP
|
|
gptkb:Badenian
|
12.7 million years ago
|
|
gptkb:Holstein_interglacial_(Germany)
|
about 374,000 years ago
|
|
gptkb:Oldest_Dryas
|
c. 14,700 years ago
|
|
gptkb:Marine_Isotope_Stage_5d
|
105,000 years ago
|
|
gptkb:Formation_of_supercontinent_Columbia
|
1.5 billion years ago
|
|
gptkb:Neoproterozoic_Oxygenation_Event
|
540 million years ago
|