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Exam 1
Ch. 1 through Ch. 7
50
Geology
Undergraduate 2
10/15/2009

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Cards

Term
The most common mineral in the earth's crust
Definition
Silicon-Oxygen tetrahedron (SiO4)-4
Term
Mineral physical properties are dependant on:
Definition
Composition and structure
Term
Minerals composed of a single pure element belong to the _______ group.
Definition
native element
Term
As a general rule metallic minerals possess _______.
Definition
streak
Term
The majority of minerals in earth's crust contain
Definition
oxygen and silicon
Term
Minerals are classified according to
Definition
physical properties
Term
Sulfide minerals are great ore minerals because...
Definition
metals are easily seperated from sulfur
Term
Eight most common elements
Definition
O, Si, Ca, Fe, Al, Na, K, Mg
Term
Melting takes place at convergent plate boundaries as a result of...
Definition
increasing depth and friction
Term
An example of two minerals having the same chemical composition:
Definition
graphite and diamond
Term
The earth's crust is mostly made of _____ elements
Definition
eight
Term
Sedimentary rocks are the dominant rock type at the surface because:
Definition
sedimentary rocks form at the earth's surface
Term
A good example of a bioclastic rock is:
Definition
Bituminous coal
Term
The melting of upper mantle rock tends to produce:
Definition
Mafic magma
Term
Violent or explosive style volcanic eruptions are associated with what kind of boundary?
Definition
continental-oceanic convergent (subduction) boundaries
Term
When visiting an erupting strato/composite volcano, you will need a hard hat because...
Definition
a bomb may hit you on the head.
Term
Which state is essentially all volcano rock?
Definition
Hawaii
Term
Example of an igneous rock that may contain no minerals...
Definition
obsidian
Term
The primary agent of sediment transport is...
Definition
water
Term
Mount Saint Helens is a composite volcano within the _______ Mountains.
Definition
Cascade
Term
Quartz and clay are the dominant minerals of clastic rocks because:
Definition
they are produced from the weathering of continental crust rocks
Term
Example of a high energy environment
Definition
shoreline/beach
Term
Best indicator of energy depositional environment
Definition
grain size
Term
The black color imparted on non-bioclastic sedimentary rocks is commonly caused by...
Definition
small amounts of organic matter
Term
The presence of cross bed structures in quartz sandstone indicates...
Definition
stream deposit
Term
The fact that Ohio has abundant coal, limestone, and halite deposits suggests past climates were much ____.
Definition
warmer
Term
Rock associated with lowest energy environment
Definition
bituminous coal
Term
Difference between conglomerate and breccia
Definition
grain shape
Term
Quartz and clay are common in clastic sedimentary rocks because they are produced by...
Definition
weathering of crustal minerals
Term
The likely source of rock for the sediments that makeup arkose is
Definition
granite
Term
Which of the following rocks are often found in the same sequence (beds) of sedimentary rocks?
Definition
quartz, sandstone and shale
Term
Magma produced from mantle material tends to produce ____ rocks.
Definition
Mafic
Term
Diorite is an example of
Definition
an intrusive rock
Term
If plate techtonics ceased to operate as an earth process, volcanic activity along convergent boundaries would cease to occur. True or False?
Definition
True.
Term
A common mineral of felsic and intermediate rocks is
Definition
feldspar
Term
Rocks produced from volcanic ash are called
Definition
pyroclastic
Term
If magma cools and crystallizes relatively quick, you would expect the crystals or rock to be:
Definition
glassy textured
Term
Rock common to Andes Mountains of western South America
Definition
Andesite
Term
The rock-forming minerals of igneous rocks belong to the group...
Definition
the silicates
Term
Mafic rocks are rich in
Definition
Sodium and Potassium
Term
Igneous activity is associated with which types of plate boundaries?
Definition
convergent and divergent
Term
The generally accepted age of the earth
Definition
4.6 billion years
Term
Continental crust material compared to mantle materials is:
Definition
relatively light (less dense)
Term
The greatest concentrations of carbon are found:
Definition
within the mantle
Term
When earth was first formed, what was life like?
Definition
no life; conditions too harsh
Term
what is a reasonable rate for plate movement
Definition
5 cm per year
Term
should ice be considered a mineral?
Definition
yes
Term
Tectonic plates are able to move on account of _____ and Earth's _____.
Definition
gravity and internal heat
Term
2 most abundant elements in earth's crust
Definition
oxygen and silicon
Term
most efficient way to move heat from the depths of the earth to the surface is
Definition
convection
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