Exam 9: Volcanoes and Other Igneous Activity

Which tabular, discordant igneous rock body intrudes along a crack or fissure?

What type of volcano is shown in the diagram below?

Composite volcanic cones are also known as ________.

Ash and lapilli are different sized pyroclastic particles.

Which of the following factors help determine whether a volcanic eruption will be violent or relatively quiescent?

Briefly discuss volcanic hazards. Although commonly thought to be associated with most volcanic eruptions (by the general public), lava is rarely responsible for the loss of life. Which hazards would tend to be more deadly? Finally, indicate those hazards that are a direct result of volcanic activity as well as those hazards that are indirectly linked.

Which of the following statements best describes the big Hawaiian volcanoes?

Magma generation at depth almost always involves partial melting, not complete melting of the source rock.

Which type of basaltic lava flow has a fairly smooth, unfragmented, ropy surface?

________ tend to increase the explosive potential of a magma body beneath a volcano.

Which of the following is NOT considered pyroclastic debris?

Which kind of volcanism is typical of mid-oceanic ridge systems?

Matching. Please choose from one of the following answers. -the volcanoes of southwestern Alaska and the Aleutian Islands

Mount St. Helens is ________.

Which of the following best describes Shiprock, a famous volcanic feature in New Mexico?

A ________ is a near surface, intrusive igneous rock body that results from local inflation of a horizontal sill.

Which statement about the May, 1980, eruption of Mount St. Helens is false?

The most violent volcanic activity is associated with ________.

Which kind of eruptive activity is most likely to be highly explosive?

Vents that emit only hot gases and vapors are called ________.