A(n) _______ is an erosional surface that represents a gap in the geologic record.
A) basal conglomerate
B) unconformity
C) boundary layer
D) lamination
E) marker horizon
Correct Answer:
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Q47: In radioactive decay a(n) _ emission is
Q48: Carbon-14 is created in the atmosphere by
Q49: Uranium-238 ultimately decays to _ -206.
A) lead
B)
Q50: The principle of _ states that fragments
Q51: In the radioactive decay process of _
Q53: A(n) _ fossil is a fossil from
Q54: The proportional amount of atoms that decay
Q55: A(n) _ is a contact in which
Q56: The carbon-14 isotope disintegrates radioactively with a
Q57: _ dating uses the effect of neutron
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