Exam 7: Crustal Deformation and Mountain Building

Carefully study the illustration below to determine the types. of geologic structures. it shows.

The line of volcanoes at C is called a ______.

The Appalachians were formed by three phases of _______ orogeny.

Exhumed basins contain ______rocks in the center of the structure and domes contain rocks in the center.

Use this figure for the following questions: The figure above is an oblique Google earth image from southwestern North America looking approximately north. The view approximately 50km across. The area is a classic area of normal faulting. -This area represents what type of mountain system?

The Peninsular terrane is now part of the crust of North America in southern Alaska. The dominant rock type in this terrane is intrusive igneous rock that ranges in composition from gabbro to granite and volcanic rock with a similar compositional range. Geologic evidence indicates the Peninsular terrane collided with North America during late Mesozoic time. Which of the following would be the most reasonable interpretation for the origins of the Peninsular terrane?

In what part of a subduction margin might you find rocks deposited on the abyssal plain, far from land?

Studies of the chemistry of rocks from arc volcanoes indicate the main source of the magma is_______ .

In the interior of continents the earth's crust is typically about 40 km thick and the elevation is near sea level. In the Himalayas the crust is more than 60km thick. Isostasy says crust thicker than this average should produce elevated terrain mountains., so why isn't the elevation of the Himalayas 20km?

Use this figure for the following questions: The figure above shows a popular area for North American tourists in winter, the Caribbean region. Match the term to the lett the Figure. -Accretionary Wedge

In an_______ fault, the hanging wall block moves up with respect to the footwall block.

In the interior of continents the earth's crust is typically about 40km thick and the elevation is near sea level. In an area where the crust is 20km thick, isostasy would suggest the elevation in this area would be_______ unless the density changes from one area to the other.

An______ fault forms when the hanging wall moves down relative to the footwall.

In thrust faulting,_______ .

Use the figure below to answer the following questions. -In the figure, which of the deformations appears most similar to what might be expected along a divergent plate boundary?

A widely cited theory associates active faults with earthquakes in China and Southeast Asia. This theory suggests_______ .

Folded limestones that are exposed high elevations in the Himalayas were originally deposited as sediments in a _______ .

Use the figure below to answer the following questions. -In the figure, the stress on block 'Y' is_______ .

Refer to the figure below, captured from Google Earth, for the following questions. -In the above diagram what type of mountain range exists at letter C?

If these mountains formed 50 million years ago, why are they still high?