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EARTH SCIENCE > geological timescale > Flashcards

geological timescale Flashcards

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Biology 101 flashcards
1
Q

longest subdivision; based on the abundance of certain fossils

A

eons

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2
Q

next to longest; marked by major changes in the fossil record

A

eras

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3
Q

based on types of life existing at the time

A

period

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4
Q

shortest subdivision; marked by differences in life forms and an vary from continent to continent

A

epochs

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5
Q

divides up the history of the earth based on life forms that have existed during specific times since the creation of the planet

A

geologic time scale

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6
Q

came up with the geological time scale

A

nicholas steno

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7
Q

remains or traces of an organism from the geologic past that has been preserved in sediment or rock

A

fossils

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8
Q

Eons, Eras, Epochs, and Periods are divisions known as?

A

geochronologic units

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9
Q

Named for exposures of Strata found in a type section in Wales by British Geologist Adam Sedgwick

A

Cambrian

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10
Q

named after significant outcrops first discovered near Devonshire, England

A

Devonian

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11
Q

Jurassic: Named for representative strata first seen in the Jura Mountains by German geologist _____ in ____

A

Humboldt 1795

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12
Q

age of mammals

A

cenozoic

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13
Q

age of reptiles

A

mesozoic

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14
Q

age of invertebrates

A

paleozoic

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15
Q

no life possible

A

4600, precambrian (hadean, archean, and proterozoic ages)

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16
Q

-SC near equator
-island arc move toward north america
-explosion of life
-phyla came into being
-oxygen levels rose enough to support life
-trilobites and brachiopods

A

Paleozoic, Cambrian (540)

17
Q

-construction of south carolina
-extinction due to growth of ice caps
-first animals with bones
-dominant: marine
-corals and trilobites

A

Paleozoic, Ordovician (490)

18
Q

-extensive erosion
-first land plants appear and land animals follow

A

Paleozoic, Silurian (443)

19
Q
  • Acadian Orogeny - SC
    metamorphism
    -dominant: fish
    -amphibians, evergreens, and ferns appear
A

Paleozoic, Devonian (417)

20
Q

-much of north am is underwater
-first seed plants appear
-sea life fluorishes
-coral, brachiopods, blastoids, and bryozoa

A

Paleozoic, Carboniferous, Mississippian (354)

21
Q

-great swamps develop (future coal deposits)
-reptiles develop from amphibians
-flying insects appear

A

Paleozoic, Carboniferous, Pennysylvanian (320)

22
Q

-pangaea forms
-appalachians rise
-90% extinction including trilobites, blastoids, fish, and amphibians because of heavy volcanism in Siberia

A

Permian (290)

23
Q

-pangaea begins to break apart
-rocky mountains and sierra nevada form
-first dinosaurs, mammals, crinoids, and modern echinoids appear

A

Mesozoic, Triassic (248)

24
Q

Golden Age of Dinosaurs
First birds appear
western US: orogeny of rockies
NA continues to rotate away from africa

A

Mesozoic, Jurassic (206)

25
Q

-mass extinction by a meteorite impact
-bye bye dinosaurs, ammonites, and 25% of marine life
-trex develops
-snakes, angiosperms, and first primates appear
-

A

Mesozoic, Cretaceous (144)

26
Q

earthquakes common
cat sized horses
tropical plants dominate (yan ang tipo ko sa mga plants, dominant🥵🥵)

A

Cenozoic, Tertiary, Paleocene (65.0)

27
Q

sea levels rise
grass spreads
diverse array of animals such as whales, rhinos, and elephants

A

Cenozoic, Tertiary, Eocene (54.8)

28
Q

appalachians uplift
erosion increases
cats dogs apes

A

Cenozoic, Tertiary, Oligocene (33.7)

29
Q

sandhills form
horses, mastadons, mammoths, tigers and camels live in south Carolina

A

Cenozoic, Tertiary, Milocene (23.8)

30
Q

volcanic activity in NA and africa
grand canyon forms
hominids develop

A

Cenozoic, Tertiary, Pliocene (5.3)

31
Q

ice sheets form
modern humans go brr
asians arrive

A

Cenozoic, Quarternary, Pleistocene (1.8)

32
Q

beaches and barrier islands form
mastadons gone
human culture fluorishes
extinction

A

cenozoic, quarternary, holocene (0.1)

33
Q

cenozoic, mesozoic, paleozoic, are considered as

A

eras

34
Q

quarternary, tertiary, cretaceous, jurassic, triassic, permian and more

A

periods

35
Q

holocene, pliocene chuchu

A

epochs

EARTH SCIENCE (6 decks)

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