Geological Time Scale Flashcards
What periods are in the Cenozoic era?
Tertiary and Quaternary
What periods are in the Paleozoic era?
Permian
Carboniferous (2): Pennsylvanin and the Mississippian
Devonian
Silurian
Ordovician
Cambrian
What periods are in the Mesozoic era?
Cretaceous
Jurassic
Triassic
What periods are in the eon era Precambrian?
Proterozoic
Archean
Hadean
What are the epochs in Tertiary period?
Holocene Pleistocene Pliocene Miocene Oligocene Eocene Paleocene
Cenozoic is the age of what?
Mammals
Homo sapiens developed 200,000 years ago
540 MYBP to Now
Phanerozoic
65-250 MYBP
Mesozoic
Mesozoic is the age of …?
Reptiles. Dinosaurs and kin were dominant
What continent(s) was during the Mesozoic era?
Laurasia (North)
Gondwana (South)
250 to 540 MYBP
Paleozoic era
Which era was Pangea in?
Paleozoic
Which era had the first animals?
Proterozoic
Paleozoic is known for what?
The origin of many animals/diversification
AND
Invasions onto land and air
Archean period epoch had what type of species?
Stromatolites (blue-green algae)
Rate of extinction is 60%
Ordovician/Silurian Extinction
47% of species died
Cretaceous/Tertiary (K/T) extinction
List the causes of the Cretaceous/Tertiary (K/T) extinction
Bolide impact
Vulcanism
Disease
When India hit Asia, Volcanism with Bolide co-occurred, causing what?
The Cretaceous/Tertiary extinction (K/T)
Gondwana and Laurasia breaking up caused what?
Triassic/Jurassic extinction
Which extinction has no known cause?
Devonian/Carboniferous extinctino
70% species extinction and overall
96% of marine life extinct
Permian/Triassic Extinction
45% species extinction rate
Triassic/Jurassic extinction
What caused the Ordovician/Silurian extinction?
Pangea moved over southern pole and caused the most severe ice age of the Phanerozoic eon
Typical conditions needed for fossilization
Hard parts (I.e. hard skeletons)
Rapid burial
Anoxic conditions
Ichnofossils mean
Impressions/trace of species like footprints or a jellyfish laying down in a bed of silt
Mineral replacement means
Original material gets replaced by various other minerals.
Which type of fossils are found in the Mesozoic era?
Mineral replacements
Carbonized forms means
Carbon is still present in the fossil, black in appearance.
What type of fossils are found in the Cenozoic era?
Carbonized forms
The Cambrian Explosion
Era where a massive amount of life developed, possibly due to the key innovation of the mesoderm
