what types of lavas are erupted at mid-ocean ridges?
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basatls
largest forms of igneos intrusions are called
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batholiths
Isochrons on the seafloor are roughly __________ the ridge axis along which they were
created.
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parallel to and symmetric about
__________ is the most common mineral or mineral group is Earth's crust
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Feldspar
Volcanic rocks derived from a hot spot get progressively older to the northeast.
Based on this information, in which direction is the plate moving?
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northeast
Hardness is referred to as a mineral's _________.
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resistance to scratching
the north american plate is bounded on the west w ________ boundaries and the east
with _________ boundaries
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convergent and transform; divergent
_______ are the most extensive geologic features on Earth today
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Mid-oceanic ridges
The atomic mass of an element is equal to the number of ______.
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protons plus neutrons
Which igneous body is a discordant intrusive rock?
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dike
Magma is by definition:
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, molten rock below the surface
The most plentiful minerals in peridotite are:
A) pyroxene and olivine.
B) amphibole (hornblende) and plagioclase feldspar.
C) pyroxene and quartz.
D) orthoclase and quartz.
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A) pyroxene and olivine
crater lake, oregon is an example of a
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caldera
Minerals with the same chemical formula but different crystal lattice structure are
referred to as __________.
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polymorphs
new oceanic crust is created at
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basatls
largest forms of igneos intrusions are called
Give this one a try later!
batholiths
Isochrons on the seafloor are roughly __________ the ridge axis along which they were
created.
,Give this one a try later!
parallel to and symmetric about
__________ is the most common mineral or mineral group is Earth's crust
Give this one a try later!
Feldspar
Volcanic rocks derived from a hot spot get progressively older to the northeast.
Based on this information, in which direction is the plate moving?
Give this one a try later!
northeast
Hardness is referred to as a mineral's _________.
Give this one a try later!
resistance to scratching
the north american plate is bounded on the west w ________ boundaries and the east
with _________ boundaries
,Give this one a try later!
convergent and transform; divergent
_______ are the most extensive geologic features on Earth today
Give this one a try later!
Mid-oceanic ridges
The atomic mass of an element is equal to the number of ______.
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protons plus neutrons
Which igneous body is a discordant intrusive rock?
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dike
Magma is by definition:
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, molten rock below the surface
The most plentiful minerals in peridotite are:
A) pyroxene and olivine.
B) amphibole (hornblende) and plagioclase feldspar.
C) pyroxene and quartz.
D) orthoclase and quartz.
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A) pyroxene and olivine
crater lake, oregon is an example of a
Give this one a try later!
caldera
Minerals with the same chemical formula but different crystal lattice structure are
referred to as __________.
Give this one a try later!
polymorphs
new oceanic crust is created at
