Most geologic information about the Precambrian is derived from ____, large port

Question

Most geologic information about the Precambrian is derived from ____, large portions of continents that have not undergone tectonic deformation since the early Paleozoic.

cratons

shields

greenstone belts

terranes

A ____ is a geologically distinctive region of Earth?s crust that has behaved as a coherent crustal block.

craton

shield

greenstone belt

terrane

A ____ is an elongate body of generally weakly metamorphosed rock dominated by the mineral chlorite that sits in masses of high-grade metamorphic rocks of felsic composition.

craton

shield

greenstone belt

terrane

cratons

shields

greenstone belts

terranes

Explanation / Answer

Most geologic information about the Precambrian is derived from ____, large portions of continents that have not undergone tectonic deformation since the early Paleozoic.

Shields because they are the exposed areas of tectonically stable Precambrian igneous or metamorphic rock.

A_______ is a geologically distinctive region of Earth's crust that has behaved as a coherent crustal block.

craton because cratons are the stable interior portion of the continents that consists of the shield and the sedimentary platform and behaves like a coherent crustal block during deformation.

A______ is an elongate body of generally weakly metamorphosed rock dominated by the mineral chlorite that sits in masses of high-grade metamorphic rocks of felsic composition

greenstone belt because greenstone belts are slivers of mafic and ultramafic rocks between the sedimentary or high-grade felsic rocks that have undergone metamorphism to form greenschist facies of minerals dominated by green minerals like chlorite, actinolite, etc which gives the belt its name.

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