Week 1 - Geological Time and the Nature of Science Flashcards
1
Q
Four aeons w/ boundaries
A
4.6 bya - Earth formation
—-HADEAN—-
4.0 bya - Earliest life
—-ARCHAEAN—–
2.5 bya - Great Oxidation Event
—-PROTEROZOIC—-
.541 bya - Cambrian explosion
—-PHANEROZOIC—-
2
Q
Moon formation
A
~4.5 bya
3
Q
caused the Great Oxidation Event
A
cyanobacteria
4
Q
first fossilized skeletons
A
541 mya; cambrian explosion
5
Q
snowball Earth
A
~600 mya
6
Q
ediacaran fauna
A
~565 mya
7
Q
Phanaerozoic eras
A
541 mya - Cambrian explosion ----PALEOZOIC---- 252 mya - PT extinction ----MEZOSOIC---- 66 mya - KT extinction ----CENOZOIC----
8
Q
appearance of humans
A
2.5 mya
9
Q
antarctic ice formation
A
45 mya
10
Q
Hadean aeon
A
4.6 - 4.0 bya
- > Earth formation
- > Moon formation
11
Q
Archaean aeon
A
4.0 - 2.5 bya
- > crust cooling
- > emergence of earliest life
12
Q
Proterozoic aeon
A
2.5 - .541 bya
- > cyanobacteria
- -> great oxidation event
- > snowball earth
- > ediacarian fauna
13
Q
Phanaerozoic aeon
A
541 mya - now
- > PT extinction (paleozoic)
- > KT extinction (mesosoic)
- > humans (cenozoic)
14
Q
KT extinction
A
KT - Cretaceous/Tertiary
KPg - Cretaceous/Palaeogene
66 mya
