Fossil Record
Extinction
Fossilized imprint
formed from pre-existing rocks or pieces of once-living organisms.
The process of determining an age on a specified chronology in archaeology and geology.
A method of dating geological or archeological specimens by determining the relative proportions of particular radioactive isotopes present in a sample.
The science of determining the relative order of past events, without necessarily determining their absolute age.
a scientist who specializes in the study of life forms that existed in previous geologic periods, as represented by their fossils
The fact or process of a species, family, or other group of animals or plants becoming extinct.
The same natural laws and processes that operate in our present-day scientific observations have always operated in the universe in the past and apply everywhere in the universe.
The imprinting of fossils in rocks.
When an animal dies and its body decays, it can leave an imprint in the sediment. If this imprint fills in with minerals from sediment and groundwater, it can harden to form a fossil.
