The next step in the Wilson cycle for the Atlantic ocean is ____
a. divergence (spreading)
b. formation of passive continental margins
c. convergence and creation of subduction zones
d. convergence (collision of continental plates)
e. mountain building
c
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If lahars can travel at 100 kmph (60 mph), how much time would it take for a flow to reach the school closest to the summit?
What will be an ideal response?
Limestone is mostly composed of the mineral quartz. Indicate whether the statement is true or false
An ultramafic rock is composed almost entirely of quartz.
Answer the following statement true (T) or false (F)
Compared to other types of magma, basalt ____
a. ?has lower viscosity, but equivalent silica content b. ?has lower viscosity and higher silicate content c. ?has higher viscosity and lower silicate content d. ?has higher viscosity and higher silicate content e. ?has lower viscosity and lower silicate content