its surface geology today reflects the roots of an ancient mountain system that has been eroded down to near sea level Platform : stable veneer of younger sedimentary rock this is process of accretion (continental growth) caused by erosion and deposition Note that North America has a very large Platform element on its SE margin that is due to marine transgressions this is the trailing edge of a westward moving plate, with a broad continental shelf that is submerged at various depths depending on global climate Mountain Belts : flanking belts of uplifted and folded rock Appalachians: 200 mya tightly folded sedimentary rock that is highly eroded Pacific belt (incl.
(a broad continental shelf; is submerged; at various depths) (sedimentary rock; is highly eroded; ) (an ancient mountain system; has been eroded down; ) (its SE margin; is; due to marine transgressions) (200 mya; tightly folded; sedimentary rock that is highly eroded) (process of accretion; caused; by erosion and deposition) (various depths; depending; on global climate Mountain Belts)
a broad continental shelf sedimentary rock an ancient mountain system its SE margin 200 mya process of accretion various depths
is submerged is highly eroded has been eroded down is tightly folded caused depending
at various depths
due to marine transgressions
sedimentary rock that is highly eroded
by erosion and deposition
on global climate Mountain Belts