Geology Chapter 2.3

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  • Created by: abbbyw
  • Created on: 26-12-17 14:34
Extrusion
the emission of magma onto the earth's surface where it forms a lava flow
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Intrusions
composed of igneous rock formed below earth's surface, where magma is forced into pre-existing rocks
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Hypabyssal
when igneous rocks form at relatively shallow depths below the surface
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Plutonic
when igneous rocks form deep below the surface
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Euhedral
crystals are well formed with good crystal faces
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Equant
crystals have all axes the same length
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Sub-equant
almost all axes are the same length
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Prismatic
crystals have 4 or more sides but are elongated in 1 direction
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Anhedral
crystals show poorly formed crystal faces
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Subhedral
crystals have some well-formed faces + some poorly formed faces
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Other cards in this set

Card 2

Front

composed of igneous rock formed below earth's surface, where magma is forced into pre-existing rocks

Back

Intrusions

Card 3

Front

when igneous rocks form at relatively shallow depths below the surface

Back

Preview of the back of card 3

Card 4

Front

when igneous rocks form deep below the surface

Back

Preview of the back of card 4

Card 5

Front

crystals are well formed with good crystal faces

Back

Preview of the back of card 5
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