Chapter 7: Metamorphic Rocks

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15 Terms

1

Rock Cycle

The succession of events that results in the transformation of Earth materials from one rock type to another.

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2

Forming Igneous Rock

Requires heating and melting of rock components.

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3

Forming Sedimentary Rocks

Requires erosion, transportation, and deposition of rock materials.

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4

Forming Metamorphic Rocks

Requires burial and/or heating of pre-existing rocks.

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5

Geochemical Cycles

Involve primarily physical components of the Earth System.

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6

Biogeochemical Cycles

Involve both physical and living components of the Earth System.

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7

Metamorphic Rock

Forms when a pre-existing rock (protolith) undergoes a solid-state change in response to the modification of its environment.

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8

Protolith

The original rock that has undergone metamorphism.

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9

Metamorphism

The process by which one kind of rock forms into a different type of rock.

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10

Foliated Metamorphic Rocks

Rocks with parallel surfaces or layers that can occur due to preferred mineral orientation or layering.

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11

Nonfoliated Metamorphic Rocks

Rocks that do not exhibit foliation and have minerals that recrystallized or grew during metamorphism.

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12

Metamorphic Grade

Represents the intensity of metamorphism based on the amount or degree of metamorphic change.

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13

Metamorphic Zone

The region between two metamorphic isograds, typically named after an index mineral found within the region.

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14

Thermal Metamorphism

Occurs due to high temperatures without pressure changes, altering rock mineralogy.

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15

Contact Metamorphism

Results from rocks coming into contact with magma, leading to changes in mineralogy and texture.

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