1 |
basement rockoldest underlying rock formation in any region.
|
2 |
basement rockn. The oldest rocks in a given area; a complex of metamorphic and igneous rocks that underlies the sedimentary deposits. Usually Precambrian or Paleozoic in age.
|
3 |
basement rockIgneous or metamorphic rock lying below sedimentary formations in the earth's crust. Basement rock does not contain petroleum deposits.
|
4 |
basement rockVery old granite and metamorphic rocks found in continental crust. These rocks make up the continental shield.
|
<< baseload | basic survival needs >> |