Term
The Wopmay orogen contains evidence for rifting, followed by the opening of an ocean basin, deposition of sediment along the edges of the ocean basin, and closure of the ocean basin through plate tectonics. This sequence of events is called a:
A. rock cycle
B. tectonic cycle
C. Wilson cycle
D. Walther's Law
E. Wopmay cycle |
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Definition
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Term
During the early Proterozoic, the Precambrian provinces of North America were welded together to form a large continent called:
A. Laurentia
B. Wopmay
C. Archaea
D. Keweenawan
E. Rodinia |
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Definition
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Term
During the Neoproterozoic, an event occurred. Hypotheses to explain the event include highly reflective land surfaces in equatorial regions, and a decline in atmospheric carbon dioxide. What was the event that these hypotheses attempt to explain?
A. glaciation
B. banded iron formations
C. rise of eukaryotes
D. sea level rise
E. change in the length of the day |
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Definition
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Term
Laminated or varved mudstones and tillites with scratched cobbles are evidence for this:
A. buildup of oxygen
B. desert conditions
C. orogeny
D. glaciation
E. warm, humid climate |
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Definition
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Term
Deposits of this metal are found in basaltic rocks and conglomerates of the Keweenawan Sequence in the Lake Superior region.
A. gold
B. copper
C. iron
D. silver
E. aluminum |
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Definition
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Term
During the Proterozoic, all of the continents were joined together for a while to form a supercontinent called:
A. Laurentia
B. Wopmay
C. Pangea
D. Keweenawan
E. Rodinia |
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Definition
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Term
This Precambrian orogeny occurred about 1 billion years ago and is recorded in rocks in eastern North America
A. Wopmay
B. Rodinia
C. Hudsonian
D. Grenville
E. Gowganda |
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Definition
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Term
The Gunflint Chert contains fossils of this type:
A. Archaea
B. Metazoa
C. plants
D. prokaryotes
E. eukaryotes |
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Definition
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Term
These larger single-celled organisms have the potential for sexual reproduction and increasing variation. They appeared by about 2.7 to 2.2 billion years ago, and began to diversify about 1.2 to 1.0 by ago, perhaps as a result of oxygen levels reaching a critical threshold.
A. eukaryotes
B. prokaryotes
C. Gunflint fauna
D. Ediacara fauna
E. stromatolites |
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Definition
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Term
Among some of the oldest large metazoan body fossils (multicellular animals) are which of the following?
A. carbon spots in Archean rocks
B. Ediacara fauna
C. Gunflint Formation
D. stromatolites
E. acritarchs |
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Definition
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Term
Not all Precambrian fossils are body fossils. Evidence of the activity of metazoans is found in sedimentary rocks in the form of trails and burrows which are also known as:
A. radioactive isotopes
B. soft-bodied fossils
C. hard part fossils
D. trace fossils
E. ghost fossils |
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Definition
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Term
The Ediacara fauna is this age:
A. Archean
B. Cambrian
C. Ordovician
D. Hadean
E. Proterozoic |
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Definition
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Term
The Ediacara Fauna consists of:
A. prokaryotes
B. eukaryotes
C. soft-bodied metazoans
D. small shells and other hard parts
E. trilobites |
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Definition
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Term
| http://bcs.wiley.com/he-bcs/Books?action=mininav&bcsId=2757&itemId=0471697435&assetId=98017&resourceId=8637&newwindow=true |
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Definition
14. B. Vishnu Schist
15. C. The older is a non conformity and the younger is an angular unconformity |
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