The N. American Cambrian Craton: A. was Perfectly flat B. dominated by arches an
ID: 159084 • Letter: T
Question
The N. American Cambrian Craton:
A. was Perfectly flat
B. dominated by arches and basins
C. surrounded by active margins
D. non of these
Point Value: 2
2.This question has not been answered completely
The largest feature of the N. American Cambrian Craton is the:
A. Michigan basin
B. cincinnati Arch
C. transcontinental arch
Point Value: 2
3.This question has not been answered completely
Thick Quartzites and shales of the Unita Mountain GROUP deposited in:
A. aulacogen setting
B. Mid oceanic ridges
C. continental collision setting
Point Value: 2
4.This question has not been answered completely
The Cambrian cross bedded sandstones exposed in the Dells of the Wisconsin River were formed by:
A. meteorite impacts
B. continental rifting
C. wind-blown sand dunes
Point Value: 2
5.This question has not been answered completely
Widespread sheet-like distribution and maturity of the Cambrian sandstones implies:
A. high clay content
B. poor sorting
C. low lands and tectonic stability
Point Value: 2
6.This question has not been answered completely
Gluconite forms on the Sea floor by:
A. large waves
B. slow deposition and sluggish chemical reactions
C. storms
Point Value: 2
7.This question has not been answered completely
Paleomagnetic data indicate the location of N. America:
A. close to the Equator
B. close to the north pole
C. close to the south pole
Point Value: 2
8.This question has not been answered completely
Hummocky stratification in fine sandstone from the Cambrian Tunnel City, Wisconsin was formed by:
A. slugish chemical reaction
B. slow deposition
C. large waves
D. evaporation
Point Value: 2
9.This question has not been answered completely
During the Cambrian times, all margins of North America were:
A. Active margins
B. Passive margins
C. subduction zones
D. oceanic trenches
Point Value: 2
10.This question has not been answered completely
Quartz sands along the Alabama_Georgia coast are similar to those of the:
A. Upper Precambrian of the N. American Craton
B. Upper cambrian of the N. American Craton
C. Upper Mesozoic of the N. American Craton
Point Value: 2
11.This question has not been answered completely
By the end of Cambrian time, at least _________of the low surface of the N. American continent had been flooded by the Sauk transgression.
A. two-fourths
B. one-fourth
C. three-fourths
Point Value: 2
12.This question has not been answered completely
Lower and Middle Cambrian deposits from Jasper National park in the Canadian Rockies were depsited on the:
A. back arc setting
B. trench setting
C. subsiding continental margin
Point Value: 2
13.This question has not been answered completely
The Cambrian Sauk transgression:
A. was continous
B. was interrupted by partial retreat
C. did nott flood N. America
Point Value: 2
14.This question has not been answered completely
During Cambrian, Ediacaran animals disappeared completely and were replaced by:
A. birds
B. Dinosaurs
C. small shelly fossils
Point Value: 2
15.This question has not been answered completely
the oldest known fossils consist of filaments of :
A. Mullscs
B. Cyanobacteria
C. brachiopods
Point Value: 2
16.This question has not been answered completely
Which of the following was the dominant Cambrian sediment:
A. Quartz-rich shale
B. Quartz-rich clay
C. Quartz-rich sand
Point Value: 2
17.This question has not been answered completely
Stromatolite structures can form only in:
A. deep marine setting
B. sand dunes
C. water shallow enough for photosynthsis
Point Value: 2
18.This question has not been answered completely
Stromatolites have been scarce since the:
A. Precambrian
B. Mesozoic
C. Ordovician
Point Value: 2
19.This question has not been answered completely
Which of the following were the first major group of organisms to leave an extensive record of very rapid diversification?
A. brachiopodes
B. trilobites
C. stromatolites
Point Value: 2
20.This question has not been answered completely
The oldest clear evidence of life were the :
A. microfossils snails
B. microfossils of cyanobacterial fillaments
C. microscopicc trilobites
Explanation / Answer
1) B
2) C
3) A
4) C
5) C
6) B
7) A
8) C
9) B
10) B
11) 3/4
12) B
13) A
14) C
15) B
16) C
17) C
18) C
19) B
20) B