All isotopes of an element have the same number of protons. Metamorphic facies, which can be used to give a range of the temperatures and pressures of metamorphism, is determined by the combination of minerals in the rock. After two half-lives, all atoms of a radioactive isotope have disintegrated to daughter products. After two half-lives, all atoms of a radioactive isotope have disintegrated to daughter products. Metasomatism involves introduction of ions from an external source.
Foliation is a common texture in most sedimentary rocks.
Erosion is the movement of earth material downslope primarily under the influence of gravity 44. Adding an overburden of fill to a slope promotes compaction of the subsurface and increases slope stability. Curved tree trunks and leaning utility poles may be signs of creep. In addition, the unit has large cross-beds and contains reptile footprints. List, in chronological order, the processes that a rock must go through to become a 1. sedimentary rock.