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Earth's history

Word List with 16 words
*By Dictionary.com

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Words in This List

contact metamorphism
noun
localized metamorphism resulting from the heat of an igneous intrusion
correlation
noun
demonstrable equivalence, in age or lithology, of two or more stratigraphic units
epoch
noun
any of several divisions of a geologic period during which a geologic series is formed
era
noun
major division of geologic time composed of a number of periods
evolution
noun
process of formation or growth; development
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fossil
noun
any remains, impression, or trace of a living thing of a former geologic age
half-life
noun
brief period during which something flourishes before dying out
index fossil
noun
widely distributed fossil regarded as characteristic of a given geological formation
isotope
noun
any of two or more forms of a chemical element, having the same number of protons in the nucleus
outcrop
noun
exposed portion of the stratum or vein at the surface of the earth
radioactivity
noun
phenomenon of spontaneously emitting radiation resulting from changes in the nuclei of atoms
relative age
noun
age of sediment layers in relation to each other
strata
noun
single bed of sedimentary rock, consisting of one kind of matter representing continuous deposition
superposition
noun
order in which sedimentary strata are superposed one above another
unconformity
noun, plural
discontinuity in rock sequence indicating interruption of sedimentation
uniformitarianism
adjective
processes that operated in the remote geological past are not different from those observed now

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Soils Quiz
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Gray day? Types of clouds
by Dictionary.com
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SAT Writing

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