Greenland Group Flashcards

1
Q

Terrane

A

Western Province Buller Terrane

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2
Q

Protolith

A

variably foliated sandstone and mudstone, with rare scattered calcareous lenses.

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3
Q

Main Lithologies

A

Interbedded indurated quartzose sandstone (greywackes) and mudstone (argillite0.

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4
Q

Depositional Age of Protoliths

A

Amphibolite 373-358 Ma

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5
Q

Age of Metamorphism

A

~370-340 Ma

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6
Q

Grades of Metamorphism Exposed

A

Greenschist - Amphibolite Facies

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7
Q

Zones

A

Greenschist _ chlorite, biotite-albite Amphibolite _ biotite-calcic plagioclase, sillimanite
Increasing grade towards the fault

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8
Q

Time that the Unit Reached the Surface:

A

~5-2 Ma

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