Why are igneous rocks the best type of rock sample for radiometric dating

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

Archaebacteria use for movement. celia flagella pili cell walls

Injuries in the environment are a result of