Geology 100 Vocabulary

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Igneous Rock
Formed from the solidification of molten magma, from rocks that have been partially melted in the earth interior.
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Igneous (Intrusive)
Solidify at depth creating large and irregular shaped masses as well as sheet like bodies. (Granite, Gabbro, Diorite)
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Pluton
Large, irregular shaped mass of igneous intrusive rock
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Dyke/Sill
Sheet-like body of intrusive igneous rock.
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Igneous (Extrusive)
Solidify fom lava that has erupted to the earth surface. If successive eruptions occur, this may from sheets.
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Sedimentary Rocks
Formed at the earth surface from the deposition of precipitates of dissolved solids/organic matter, which froms into hard rock.
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Detritus
Precipitates of solids/organic matter.
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Strata
Sedimentary rock layers
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Conformable
Neatly stacked strata that have no time gap between them
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Unconformity
Break in a sequience of rocks that represet a period of non-deposition or erosion.
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Angular Unconformity
Younger beds overly & truncate older beds which have been folded or tilter,
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Disoconformity
both younger and older strata lay parallel to eachother, yet there is an abrupt change in age across the disconformity.
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Nonconformity
Stratified sedimentary rock overlay older plutonic igneous or massive metamorphic rocks
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Metamorphic Rocks
Rocks that have undergone a transformation as they have ben subjected to high temperatures, pressures &/or fluids.
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Foliation
Layering
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Contact Metamorphism
occurs when hot malten magma "bakes" the surrounding rocks
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Other cards in this set

Card 2

Front

Igneous (Intrusive)

Back

Solidify at depth creating large and irregular shaped masses as well as sheet like bodies. (Granite, Gabbro, Diorite)

Card 3

Front

Pluton

Back

Preview of the front of card 3

Card 4

Front

Dyke/Sill

Back

Preview of the front of card 4

Card 5

Front

Igneous (Extrusive)

Back

Preview of the front of card 5
View more cards

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