Most geologic information about the Precambrian is derived from ____, large port
ID: 290639 • Letter: M
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.