Geology Exam 2

Which of the following types of volcanic eruption have occurred on Mount St. Helens since it began Erupting in 1980? Eruption Column Volcanic Dome Pyroclastic Flow All of these

This Volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?

This relatively large, symmetrical volcano contains interlayered lava flow, pyroclastic deposits, and volcanic mudflows. What kind of volcano is it?

Long, thin lava flows are typically produced by:

What type of basaltic feature is shown in this photograph?

When basaltic lava reach the ocean they:

Flood basalts influence life on Earth because: > Eruptions can release large amounts of gas that cool the atmosphere > Large volumes of flood basalts are erupted during a short time > Eruptions can release large amounts of gas that warm the atmosphere > All of these

Which of the numbered featured is a lava flow?

What type of material likely composes this volcano? >Pyroclastic flows >Felsic to intermediate lava flows >Volcanic mudflows and landslides >All of these

What type of eruption formed this flow-banded rhyolite?

What type of eruption formed this unit composed of volcanic blocks and volcanic ash?

What are the rounded hills inside the Valley Caldera?

What tectonic setting is interpreted to be the cause of volcanism at Yellowstone?

Most of the exposed surface of the Earth is covered with:

Lithifies can be defined as:

Sediments with a large amount of sand are most likely at:

Which of the following sites would most likely have turbidity currents?

Which of the following processes is NOT considered to be chemical weathering?

The effect of transportation on a pebble's particle size is best summarized by which statement?

If a rock is poorly sorted, this means the rock contains:

This photograph shows chalk. How is it formed?

This photograph shows chert. How does it form?

What can you infer from this contact between an overlying conglomerate and underlying sandstone?

Which of the following does NOT define layers in some sedimentary rocks? > A sharp contact between two rock types > A change in mineral composition > a change in grain size > a change in color > all of these are ways that can define layers in sedimentary rocks

These sandstone beds are inter-layered with dark dark marine shales. What is the most likely environment in which the sandstone formed?

A very well sorted with large-scale cross-bedding indicates the sand was likely:

In this section, a lower gray rock is successively overlain as follows: limestone is overlain by mudstone, which is overlain by beach sandstone. What is the best interpretation of what was going on?

Imbricated clasts in this river means that:

What type of tectonic event formed the main structures in the Valley and Ridge Province of the Appalachian Mountains?

Which of the following is most likely to occur at shallow crustal levels?

When a rock is subjected to tectonic forces and experiences stress that is not the same in all directions, it is under:

What type of stress formed the structure shown in this figure?

Under what conditions was this rock likely deformed?

Fractures along which the rock has slipped relative to the other side are called:

What type of fault is shown in this figure?

What type of metamorphic feature is shown in this photograph?

A fold that has only one dipping segment is a(n):

Which of the following does NOT help define lineation in some metamorphic rocks?

What type of metamorphic feature is shown in this photograph?

Which of the following matches a sedimentary rock with a possible metamorphic equivalent?

Which of the numbers on this figure indicates typical continental conditions (regional metamorphism)?

In what site on this figure would you expect high pressure/low temperature metamorphism?

What feature is displayed as the two prominent, vertical lines cutting across the metamorphic rock in the image?