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Big History | Study Guide > Geological Time > Flashcards

Geological Time Flashcards

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1
Q

Precambrian

A

4,500-544 MYA

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2
Q

Cambrian

A

Paleozoic Era 1/6
544-488 MYA

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3
Q

Ordovician

A

Paleozoic Era 2/6
488-444

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4
Q

Silurian

A

Paleozoic 3/6
444-416

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5
Q

Devonian

A

Paleozoic 4/6
416-359 MYA

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6
Q

Carboniferous

A

Paleozoic 5/6
359-229 MYA

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7
Q

Permian

A

Paleozoic 6/6
299-250 MYA

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8
Q

Triassic

A

Mesozoic 1/3
250-199 MYA

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9
Q

Jurassic

A

Mesozoic 2/3
199-145

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10
Q

Cretaceous

A

Mesozoic 3/3
145-65 MYA

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11
Q

Paleogene

A

Cenozoic 1/3
65-23 MYA

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12
Q

Neogene

A

Cenozoic 2/3
24-2.6 MYA

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13
Q

Quartenary

A

Cenozoic 3/3
2.6-0 MYA

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14
Q

Paleocene

A

🏷️ 1/3 of Paleogene
📐 Cenozoic Era
🕰️ 66-56 MYA

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15
Q

Eocene

A

🏷️ 2/3 of Paleogene
📐 Cenozoic Era
🕰️ 56 to 33.9 MYA

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16
Q

Oligocene

A

🏷️ 3/3 of Paleogene
📐 Cenozoic Era
🕰️ 33.9-23 MYA

17
Q

Miocene

A

🏷️ 1/2 of Neogene
📐 Cenozoic Era
🕰️ 23.03 to 5.333 MYA

18
Q

Pleiocene

A

🏷️ 2/2 of Neogene
📐 Cenozoic Era
🕰️ 5.333- 2.58

19
Q

Pleistocene

A

🏷️ 1/2 of Quartenary
📐 Cenozoic Era
🕰️ 2.58MYA-11,700

🧊 Cycles of Ice Ages of 40-100 thousand years cycling over 2.5 Million Years

👣 Homo Sapiens emerge and spread throughout Afro-Eurasia and all other Homo species go extinct in late Pleiocene

20
Q

Holocene

A

🏷️ 2/2 of Quartenary
📐 Cenozoic Era
🕰️ 11,700 years-Now
🧊🔥 End of the Ice Age, temperatures rise..

👣 Epoch of man & agriculture 🐄 🌾

21
Q

☠️ Ordovician-Silurian

A

☠️ 1st Mass Extinction
🕰️ 445 MYA
🧊 Sea levels fall and temperatures drop as thick of ice sheet covers South Pole 🥶
🏝️ Shallow sea-shelfs obliterated
🦑 2/3 sea invertebrates become extinct as the whole ecosystem is affected

22
Q

☠️ Late Devonian

A

☠️ 2nd Mass Extinction
🕰️ 365 MYA
🫧 Oxygen level drops & temperatures drop again 🥶
🐟 Many cartilaginous fish die
🦈 Replaced by bony fish & sharks

23
Q

☠️ Permian-Triassic

A

☠️ 3rd Mass Extinction
🕰️ 250 MYA
🌋 Heavy volcanic activity during formation of Pangea 🌍 reducing shelf seas and shallow water, temperatures rise 🥵
🏝️ Shallow sea-shelfs obliterated again
🦀 96% of all marine species die
🐊 70% of all species go extinct

😳 Biggest extinction to date

24
Q

☠️ Triassic-Jurassic

A

☠️ 4th Mass Extinction
🕰️ 200 MYA
🌍 Pangea breaks up and activates more volcanic activity 🌋
🦖 Dinosaurs win the battle
🪱 Marine invertebrates and sea shelf organisms lose out with increased heavy rainfall cycles 🌧️

25
Q

☠️ Cretaceous-Paleogene

A

☠️ 5th Mass Extinction
🕰️ 66 MYA
☄️Asteroid hits Chicxulub, Yucatan
🌫️ Acid rain & dark skies
🌿 Plants affected
🦕 Dinosaurs die
🐀 🐥 Ancestors of mammals and birds survive & make way

Big History | Study Guide (4 decks)

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