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earth history

TermDefinition
absolute age Absolute age is the true age of a rock or fossil. Absolute age tells scientists the number of years ago a rock layer formed.
relative age The geologic age of a fossil organism, rock, or geologic feature or event defined relative to other organisms, rocks, or features or events rather than in terms of years.
faults a fault is a planar fracture or discontinuity in a volume of rock faults are the cause of most earthquakes.
the law of superposition stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.
unconformities An unconformity is the contact between sedimentary rocks that are significantly different in age, or between sedimentary rocks and older, eroded igneous or metamorphic rocks.
relative dateing Relative dating is the science of determining the relative order of past events
radiometric dating Radiometric dating or radioactive dating is a technique used to date materials such as rocks or carbon
Created by: worbro2133