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the rock and fossil

vocab for rock and fossil record

TermDefinition
uniformitarianism the same process shaping the earth today shaped the earth in the past and will shape the earth in the future
catastrophism principle that states that all geological change occurs suddenly
catastrophe unpredicatable event, tsunami, earthquake
paleontology science of studying past earth
relative dating determining if event/object is older/younger then other events/object
superposition principle that states rocks toward the top is younger then bottom rocks
geologic column ideal sequence of rock layers that contains all the known fossils and rock formations on Earth, arranged from oldest to youngest.
fault break in the earths crust along which blocks of the crust slide relative to one another
intrusion molten rock from the earths interior that squeezes into existing rock and cools
unconformity surface that represents a missing part of the geologic column.
absolute dating The process of establishing the age of an object by determining the number of years it has existed
fossil The remains or physical evidence of an organism preserved by geologic processes
index fossil fossils of organisms that lived during a relatively short, well-defined geologic time span.
geologic time scale a scale that divides Earth’s 4.6 billion–year history into distinct intervals of time.
eon largest divisions of geologic time
period third largest divisions of geologic time
era second largest divisions of geologic time
epoch fourth largest divisions of geologic time
extinction the death of every member of a species.
original horizantal most sedimentary layers of rock are deposited in a horizontal position
extrusion igneous rock layer formed when lava flows onto earths surface
evolution process which all the different kinds of living things have changed over time
mass extinction an event during which a significant part of all life on earth became extinct due to a catastrophe
scientific theory well-tested concept explains wide range of oberservations
geology study of the origin history and structure of the earth and the processes that shape the earth
Created by: krisna.patl
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