27 Dec Select one: a. North
Earth 310: The Violent Earth Questions
True or False?
Modern geologic knowledge is the product of curious individuals, who 1) questioned our knowledge of scientific fact, 2) investigated natural processes, and 3) honestly reported the facts.
So far we’ve focused on the differences between volcanic calderas and a volcanic craters… which both form at volcano peaks.
True or false?
Calderas and craters are similar because they are both landforms that show a collapse in the land surface above an area of volcanic activity.
What criteria do geologists use to designate a supervolcano?
a. If it has a caldera
b. If it erupts more than a specific volume of material
c. If it is a shield volcano
d. If it formed over a hot spot
What evidence do geologists study to understand the relative magnitude or frequency in time of past volcanic eruptions?
Hint: Please consider the data shown on our geologic map of past lahars around Mt Rainier. 🙂 These mapped lahars enable us to estimate the risk of building in a particular area.
a. The relative extent of volcanic deposits
b. The relative age of volcanic deposits
c. The relative thickness of volcanic deposits
d. All of these
Consider the age of the various Hawaiian Islands given below in millions of years. Remember, the formation of the Hawaiian Islands reflects: 1) the movement of the Pacific plate, and 2) stationary volcanic hotspot activity over time.
Which direction is the Pacific plate currently moving?
Maps are plan or bird’s eye views of the earth’s surface. Here, the top of the figure is north, and the bottom of the figure is south. The left side of the figure is west, and the right side is east.
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