GEOL 1001 Chapter : Geology Chapter Three
Document Summary
Curving ridges = island arc (associated with earthquakes) Alfred wegener wondered why continents looked as if they could be puzzled happened. Three different types of plate motions: together (proposed continental drift); couldn"t come up with mechanism and why it. Convergent (west side of south america) plates are colliding together. Mid-ocean ridges (oceanic plates move apart at mid-ocean ridges (seafloor spreading)) Magma erupts and solidifies at depth and forms new oceanic crust. Ridge high (hot rocks and thin lithosphere) Can lead to seafloor spreading and new ocean basin. Two oceanic plates move toward one another. Accretionary prism (right in front of the trench which is ripped off sediments. Island arc = curved chain of volcanoes from the crust moving under. Magma rises and some solidify into crust. Volcanoes, solidified magma in crust, and deformation form mountain belt. Continental collision = wide zone of deformation. Plates move horizontally past one another on transform boundaries. Transforms link other types of plate boundaries.
