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Geological Column Flashcards

(10 cards)

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1
Q

Ra of Cambrian explosion

A

541 Ma

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2
Q

Ra of Permian-Triassic boundary

A

252 Ma

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3
Q

Ra of Cretaceous-Tertiary boundary

A

66 Ma

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4
Q

Consensus age of Earth

A

4.6 Ga

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5
Q

The three eras of the phanerozoic

A

Paleozoic, Mesozoic, Cenozoic

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6
Q

The high concentration of what element characterizes the K-Pg (KT) boundary?

A

Iridium

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7
Q

Systems of the paleozoic?

A

Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian

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8
Q

Systems of the Mesozoic?

A

Triassic, Jurassic, Cretaceous

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9
Q

Systems of the Cenozoic?

A

Paleogene, Neogene

Formerly, Tertiary, Quaternary

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10
Q

Consensus age of universe

A

13.8 Ga

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