Morrison Fm., Jurassic, Utah- Dark grey units are overbank deposits. White units are sandstones. Thicker units are channel fill deposits (note accretion surfaces stepping down to the right on the right side of the outcrop. Thin white beds are probably crevasse splay deposits. Note these record individual flood events that carried sands out onto the flood plain of the time.

RETURN to lecture notes Part A RETURN to lecture notes Part B SKIP TO SLIDE NUMBER   Castissent Fm. Columbia River crevasse Morrison Fm. Platte River exposed bars Platte River submerged bars Kayenta Fm. channel Kayenta Fm., bars A Kayenta Fm., bars B Toutle River, gravelly braided Toutle River, bar Toutle River at low flow Montserrat Conglomerate