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Lava that hardens on a surface is called an
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
An _________ is when the magma cools and hardens into a mass of igneous rock.
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
The relative age of a rock is
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
The study of rock layers is called
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
What is the age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passes?
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
Index fossils are useful because they tell the ______________ __________ of the rock layers in which they occur.
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
The law of superposition states that, in horizontal layers of sedimentary rock, each layer is i
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
A(n) ___________ is a gap in the geologic record where some rock layers have been lost because of erosion.
stratigraphy
unconformity
extrusion
intrusion
its age compared to the ages of other rocks.
older than the layer above it and younger than the layer below it.
relative age
always younger
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