9: geologic time Flashcards
1
Q
gaps in the geologic record
A
unconformities
2
Q
what puts events in proper order of formation
A
relative dates
3
Q
matching exposures of rocks that are the same age but are in different places is called
A
correlation
4
Q
the principle that states fossil organisms succeed one another in a definite and determinable order
A
principle of fossil succession
5
Q
the spontaneous breakage of certain unstable atomic nuclei
A
nuclear decay
6
Q
an unstable radioactive isotope is called a
A
parent
7
Q
a parent will decay and form
A
daughter products
8
Q
the rock that isn’t directly datable as it consists of material produced by the weathering of other rocks
A
sedimentary strata
9
Q
the well documented era because of abundant fossil evidence
A
Phanerozoic era
