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Fossils

Earth Science

QuestionAnswer
Petrification Where minerals and water seep into bones of decayed animals and turn the bones to stone after evaporation
Half life the amount of time it takes a radioactive element to have half decay into a non radioactive element
Nonconformity forms between non sedimentary and sedimentary rocks
Radioactive dating the amount of time it takes a radioactive element to have half decay into a non radioactive element
Intrusion of magma has to have formed after the rock layers were present, therefore the intrusion is younger
Extrusion of magma is when magma is forced to the top of the rock layers, layers were there first, therefore the extrusion is younger
Fault a  crack in the rock where one side can move
Rate of deposition Can use the average amount of deposition, about 30mm a year to date fossils and rock layers
Created by: elarocco
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