Introduction to Physical Geology - Chapter 6

What is the spread of lava as it pours out of a vent?

• magma chamber
• pipe
• lava flow
• crater
• spout

Beneath a volcano, magma collects in a:

• magma chamber
• magma pocket
• vent
• hole
• pool

Which of the following volcanic flows could the average adult person outrun?

• Basaltic lava flow

• Pyroclastic flow

• Lahar

• Tsunami

• None of the above

Select the name that describes the volcano

• Cinder cone

• Shield

• Strato Volcano

• Calderas

• Lava Domes

•What is the plate-tectonic setting of Mount Rainier and Mt. St. Helens?

• A hot spot related to Yellowstone

• Spreading along the Juan de Fuca ridge

• Subduction beneath the Pacific Northwest

• A continent-continent collision

• None of the above

Shield volcanoes commonly involve:

• Fluid lava flows

• Lava fountains

• Viscous lava flows

• Pyroclastic flows

• a) and b) only

How does pillow basalt form?

• From a pyroclastic flow

• When flows over a field of pillows

• Explosive eruption of lava into atmosphere

• Eruption of lava in water

• None of the above

What kind of volcano is most closely associated with pyroclastic flows?

• Shield volcano

• Cinder cone

• Composite volcano

• Mid ocean ridge

• None of the above

What controls the violence of a volcanic eruption?

• Temperature of the magma

• Amount of silica

• Viscocity of the magma

• b) and c)

• None of the above