Geologic Time Scale: Basics Flashcards

1
Q

What is the supereon?

A

Precambrian

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2
Q

what are the four eons following the precambrian, in order from oldest to most recent?

A

Hadean, Archean, Proterozoic, Phanerozoic

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3
Q

name the three Eras within the Phanerozoic from oldest to youngest

A

Paleozoic, Mesozoic, Cenozoic

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4
Q

Name the seven periods within the Paleozoic time scale from oldest to youngest

A

Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, Permian

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5
Q

Name the three periods within the Mesozoic era, oldest to youngest

A

Triassic, Jurassic, Cretaceous

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6
Q

Name the two periods in the Cenozoic era, oldest to youngest

A

Tertiary, Quaternary

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7
Q

Name the five Tertiary period Epochs from oldest to newest

A

Paleocene, Eocene, Oligocene, Miocene, Pliocene

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8
Q

Name the two epochs in the Quaternary period

A

Pleistocene, Holocene

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9
Q

What two periods is the Tertiary Era broken up into?

A

Paleogene and Neogene

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10
Q

What does Paleozoic mean?

A

ancient animals

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11
Q

what does Mesozoic mean?

A

middle animals

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12
Q

what does Cenozoic mean?

A

recent animals

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13
Q

Cambrian Period

A

marine invertebrates emerge

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14
Q

Ordovician Period

A

primitive fish form, index fossil is the trilobite Cryptolithus

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15
Q

what are the two periods in the Age of Invertebrates?

A

Cambrian and Ordovician

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16
Q

what two periods are in the Age of Fishes?

A

Silurian and Devonian

17
Q

Silurian Period

A

Early land animals emerge

18
Q

Devonian Period

A

First forests and amphibians emerge, index fossils: mucrospirifer and phacops

19
Q

what two periods make up the Age of Amphibians?

A

Carboniferous and Permian

20
Q

what two periods are in the Carboniferous period?

A

Mississippian and Pennsylvanian

21
Q

Mississippian Period

A

widespread shallow seas form

22
Q

Pennsylvanian Period

A

coal bearing rocks form

23
Q

Permian Period

A

earliest gymnosperms (cone bearing trees)

24
Q

Mesozoic Era

A

Age of Reptiles, dinosaurs dominate

25
Triassic Period
first dinosaurs appear and earliest mammals
26
Jurassic Period
earliest birds
27
Cretaceous Period
Flowering plants (angiosperms) develop
28
Cenozoic Era
Age of Mammals
29
what are the Ages?
Age of Invertebrates, Fishes, Amphibians, Reptiles, Mammals, Birds
30
Tertiary period
Apes appear
31
Paleocene
"Age of Birds"
32
Eocene
Age of Birds, further dev. of mammals. Giant birds rule everything
33
Oligocene
rise of True Carnivores
34
Miocene
Grasses and Grazing animals develop
35
Pliocene
First modern animals
36
Quaternary Period
Humans appear and develop. We are still in this Period.
37
Pleistocene
first humans
38
Holocene
current epoch
39
-cene =
epoch