Exam 4: Volcanoes and Volcanic Processes

A(n) ________convergent plate margin is associated with a volcanic island arc.

A(n) _________plate margin commonly evolves from a divergent one.

Since the early Mesozoic, the__________ has been passive tectonically.

What are two broad ideas on the pace of evolution of continents?

Which of the following best describes the geology of the Pacific coastal regions of western North America including Alaska?

The Western Canada Foreland Basin and the Appalachian Foreland Basin both formed___________ .

The___________ are a geologically old mountain range folded and deformed during the Paleozoic.

What mechanism is proposed for Cretaceous subsidence of the Canadian and American prairies?

Which one of the following is an example of an isostatic movement?

Thick thrust sheets of massive Proterozoic and Paleozoic carbonates from glaciated peaks with steep cliffs on all sides like Castle Mountain in western Alberta are found in this part of the Rockies.

The term ____________refers specifically to the collection of all geologic processes and tectonic events that are responsible for building mountain belts.

Which mountain belt did not have a stage of continent- continent collision as it formed?

Between the original Proterozoic rifting of Rodinia and the Late Paleozoic rifting or Pangaea, how much "real estate" was added to the North American continent?

Obducted ophiolite and island arc sequences are part of a ________margin.

Subduction zones include all of the following except for _____________.

Mountains without active volcanic arcs are associated with a(n) __________margin.

The___________ have crust about twice as thick as normal.

Mountain belts formed in several stages by the opening and closing of the Iapetus Ocean in the Paleozoic, include the___________ .

What is the explanation for the rugged mountain and valley topography of the Basin and Range, some 1600 km inland of a plate boundary?

Low elevation rounded mountains and hogbacks underlain by thrusts and folds in easily- eroded Mesozoic and Cenozoic strata are found in this part of the Rockies.