fossol Flashcards
uniformitariamism
a principle that states that geologic process that occurred in the past can be explained by current geologic processes
catasrophism
a Principe that states that geologic change occurs suddenly
paleontology
the scientific study of fossils
relative dating
any method of determining whether and event of object is older or younger than other events of objects
superposition
a principle that states that younger rocks lie above older rocks if the layers have not been disturbed
unconfonformity
a break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time
absolute dating
any method of measuring the age of an event or object in years
isotope
an atom that has the same number of protons as other atoms the same element do but that has a different number of neutrons
radioactive decay
the process in which a radioactive isotope tends to break down into stable isotope of the same element or another element