Uniformitarianism Reflects the Belief Among Geologists That the Earth Remains

Q12: The _ Era is the Age of

Q13: So far, the oldest mineral found on

Q14: _ is the spontaneous nuclear change of

Q15: The _ includes most of geologic time

Q16: Isotopic dates from volcanic ash or lava

Q18: Isotopic dating has shown that the Precambrian

Q19: A(n) _ is a contact in which

Q20: A(n) _ is an erosional surface that

Q21: Fossils are common in _.<br>A) all rock

Q22: The half-life of the carbon 14 isotope