The Relative Age Of Rocks: Question Preview (ID: 17778)


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A(n) _________ fossil is a fossil that must be widely distributed and represent a type of organism that existed only briefly.
a) intrusive b) unconformity c) relative d) index
An _________ is when the magma cools and hardens into a mass of igneous rock.
a) absolution b) extrusion c) intrusion d) uncomformity
Lava that hardens on a surface is called an
a) absolution b) extrusion c) intrusion d) unconformity
The _________ age of a rock is the number of years since the rock formed.
a) absolute b) temporary c) relative d) apparent
A(n) ___________ is a gap in the geologic record where some rock layers have been lost because of erosion.
a) opportunity b) conformity c) uniformity d) unconformity
A rock layer's ___________ age is its age compared to the ages of other rock layers.
a) absolute b) temporary c) relative d) apparent
What is the age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passes?
a) sometimes younger, sometimes older b) always older c) the same age as the other rock layers d) always younger
The law of superposition states that, in horizontal layers of sedimentary rock, each layer is i
a) a younger than the layer above it and older than the layer below it. b) neither older nor younger than the other layers. c) older than the layer above it and younger than the layer below it. d) always older than any vertical layers.
The relative age of a rock is
a) its age compared to the ages of other rocks. b) less than the age of the fossils the rock contains. c) the number of years since the rock formed. d) its age based on how much carbon-14 the rock contains.
Index fossils are useful because they tell the ______________ __________ of the rock layers in which they occur.
a) absolute age b) relative age c) apparent age d) temporary age
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