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Geologic History g 9

QuestionAnswer
Big Bang Theory whole universe began as a dense mass and the most accepted theory
Outgassing over time, rocks began to form although volcanic eruptions were constant
Fossil remains or evidence of life
Relative dating refers to the determination of age compared to other events
Absolute dating refers to determining the actual age of something in years
Uniformitarianism the theory that the geolocic processes that one occarring today orurred in the same way as the past
Law of superposition the oldest rocks are deposited first
fold when roock layers are bent or deformed due to tectonic stress(such as plate collisions)
Intrusion when magma cuts through rock, causing contact metamorphism of pre-existing rock
Fault a crack or break in the rocks along which movement has occurred
extrusion when magma(lava) cuts through rock and reaches the suface, causing contact metamorphism of the pre-existing rock.
original horizontality sedimentary rock layers are laid done in flat water
Law of Included fragments included fragments in a rock are always older then the rock itself.
Unconformity a buried erosional surface unconformity(erosionl gap)
contact metamorphism occurs when magma touches & alters preexisting rock layers
correlation matching rocks or geolocic events from diffrent places
radioactive Decay unstabl atoms releases particles and electromagnetic energy thus changing into atoms of other isotopes and elements
half-life the time required for half of the atoms in a given mass of an isotope to decay
Created by: katcanny
Popular Earth Science sets

 

 



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