What does the collapse of the rising eruption column often produce?
A. Pyroclastic flows
B. Lateral blasts
C. Volcanic mudflows
D. Tsunamis
Answer: A
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A certain lake in the arid west contains an endangered species of fish. The legal status of this fish required water diversions out of the river feeding the lake to be decreased substantially
About 10 years following this decree, the declining cottonwood forest and canopy along the riverbanks was noted to be recovering. This situation illustrates the potential effectiveness of a. the species approach to sustaining biodiversity b. the ecosystem approach to sustaining biodiversity c. cottonwood trees as part of all stream recovery programs d. water as a solution to species decline e. fish as indicator species
There is no evidence in the geologic record that multicelled organisms of any kind existed prior to the Cambrian
a. True b. False
Sedimentary structures serve as clues to depositional settings. The following features are sedimentary structures:
a. Bedding b. Ripple Marks c. Mud Cracks d. Fractures e. All of the above except d
What are elongated, streamlined rock ridges in wind-dominated erosional areas called?
A)ventifacts B)barchan dunes C)longitudinal dunes D)yardangs E)desert pavement