Term
| Proterozoic Eon last from --- billion year to --- million years ago |
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Definition
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Term
Comprises --- of Earth history
A. 22%
B. 32%
C. 42% |
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Definition
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Term
Proterozoic Eon was divided into all of these three eras except:
A. Paleoproterozoic Era
B. Mesoproterozoic Era
C. Cenoproterozoic Era
D. Neoproterozoic Era |
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Definition
C. Cenoproterozoic Era
Paleoproterozoic Era (2.5 - 1.6 by ago)
Mesoproterozoic Era (1.6 to 1.0 by ago)
Neoproterozoic Era (1.0 by ago to the beginning of the Paleozoic, 542 my ago)
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Term
| The Beginning of the Proterozoic Marks the Beginning of: |
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Definition
•More modern style of plate tectonics
•More modern style of sedimentation
•More modern global climate with glaciations
•Establishment of the beginnings of an oxygen-rich atmosphere
•Emergence of eukaryotes
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Term
| Precambrian provinces were welded (or sutured) together to form a large continent called --- during the early Proterozoic. |
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Definition
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Term
Provinces were assembled by about --- b.y. ago.
A. 1.7
B. 2.7
C. 3.7 |
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Definition
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Term
Laurentia continued to grow by --- throughout the Proterozoic.
A. Incretion
B. Accretion
C. Decresion |
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Definition
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Term
| Late in the Proterozoic, the continents became assembled into a supercontinent called ---. |
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Definition
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Term
| Sedimentation on and around the craton consisted of shallow water clastic and carbonate sediments deposited on broad --- and in ---. |
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Definition
continental shelves
epicontinental seas |
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Term
Proterozoic glaciations occurred during all except:
A. Paleoproterozoic
B. Mesoproterozoic
C. Neoproterozoic |
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Definition
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Term
Major Events of the Paleoproterozoic included all but:
a. Active plate tectonics
b. Major mountain building on all major continents
c. Earth's first glaciation
d. Major increase in fossilization
e. Widespread volcanism (continental flood basalts)
f. Rise in atmospheric oxygen (great oxidation event)
g. Accumulation of high concentrations of organic matter in sediments (Shunga event) 2000 m.y. ago, and generation of petroleum
h. Oldest known phosphorites and phosphate concretions |
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Definition
| d. Major increase in fossilization |
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Term
| --- developed around margins of the Archean provinces. |
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Definition
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Term
| The Paleoproterozoic Era ranges from about --- b.y. to --- b.y. |
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Definition
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Term
| This sequence of events in the Wopmay orogenic belt is called a ---, and is a result of ---. |
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Definition
Wilson Cycle
plate tectonics |
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Term
1. Rifting and opening of an ocean basin
2. Sedimentation along new continental margins
3. Closure of the ocean basin
Are all part of what? |
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Definition
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