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THE GRABENS Assignment

Plate tectonic processes include all of the following, except what?

	ocean floor spreading
	creation of new oceanic crust at mid-ocean ridges
	subduction of heavier (more dense) continental crust under lighter (less dense) oceanic crusts
	crustal rearrangement

An anticline is what?

	a geologic structure in which rock strata dip inward toward a common central linear area of rock depression
	a structural landform that occurs mostly in arid environments
	a geologic structure in which rock strata dip outward from a common central linear area of uplift
	a structural landform that is restricted to mountains
	none of the above

A batholith is what?

	usually generates fine textured igneous rocks
	a massive pluton that cools slowly
	the first stage in the formation of metamorphic rocks
	a moderate size pluton that forms just below the Earth’s surface
	none of the above

Divergent plate boundaries are characteristic of what?

	seafloor spreading centers
	all plate boundaries
	collision zones of compression between plates
	lateral motions of plates
	none of the above

The Himalayas and the Alps are the result of what?

	ocean plate/continental plate collision
	subduction
	continental plate/continental plate collision
	ocean plate/ocean plate collision
	none of the above

Volcanic activity in the Hawaiian Islands

	is illustrative of magma generated by plate subduction.
	produces andesite-type volcanoes.
	is illustrative of magma generate at a mid-ocean rift zone.
	results from magma intrusion through ocean crust that has been moving across the top of a hot-spot magma convection flow.
	is none of the above.

Pangaea

	is the period of geologic history that predates continental life (biological) forms.
	is the name for the former super continent thought to have broken apart into several crustal plates (representing the modern continents).
	is the part of California west of the San Andreas Fault where the continental crust is moving into the Pacific Ocean.
	is a rift valley in eastern Africa where a new ocean is forming.
	is none of the above.

A laccolith

	usually is larger in size than a batholith.
	usually cools more rapidly than a batholith.
	represents a place where extrusive igneous rocks form.
	is illustrated by the local hot-spot landforms of the Hawaiian Islands.
	is none of the above.

In a strike-slip fault, the movement

	is entirely downward.
	is entirely horizonal.
	is entirely upward.
	is both upward and horizontal.
	is none of the above.

Diastrophism

	refers to the deformation of Earth’s crust by bending or breaking in response to great pressures exerted either from below or from within the crust.
	refers to all processes in which magma moves from the Earth’s surface to or near the surface.
	refers to a discredited theory of continent formation.
	refers to the boundaries between crustal plates.
	is none of the above.

Horst and graben topography is associated with _____ faults.

	normal
	strike-slip
	reverse
	overthrust
	overslip

_____ is the technique used to date and study the ocean floor, which was fundamental in leading to the general acceptance of plate tectonics.

	isostasy
	paleoalignment
	pangaeation
	paleomagnetism
	plasticity

The youngest rocks at the Earth’s surface tend to be located _______.

	on major mountain range where the crust is thickest
	near the midocean ridge
	near ocean trenches where subduction is occurring
	the to shield region of North America

The feature in the foreground of this photograph is a(n) _____. [Photo Source]

	syncline
	anticline
	monocline
	horst
	graben

The Black Hills, South Dakota, is a dome-shaped feature formed over a ____.

	volcano
	dike
	sill
	laccolith
	mesa

Shiprock, New Mexico, formed from lava solidifying in the “throat” of a volcano. Today, the exposed sharp spire is called _____.

	a batholith
	a dike
	a vocanic neck
	a sill
	none of the above

Mount Fuji, Mount Rainier, and Mount Shasta are all

	composite volcanoes.
	lava domes.
	shield volcanoes.
	cinder cones.
	exposed batholiths.

A caldera forms

	over a batholith.
	from the collapse of a laccolith.
	from the intrusion of a dike.
	from the collapse of a volcanic crater.
	none of the above.

A block uplifited between two parallel faults is a

	plateau.
	horst.
	graben.
	mesa.
	caldera.

The Columbia plateau

	is a graben.
	was built of flood basalts.
	formed from a batholith.
	is a result of an eroded anticline.
	is none of the above.

Tumwine Edward

I am a God fearing Ugandan involved in the Digital Communications, Training and Platform development.

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Tumwine Edward

9 years ago

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