'Spreading center' diaporamas de présentation

The theory of continental drift can be proved in four ways, can you name them?

542 views • 41 slides

Prentice Hall EARTH SCIENCE

759 views • 37 slides

Island Arc Magmatism

Island Arc Magmatism. Eruption of Anatahan Volcano, Northern Mariana Is, June 10, 2003. Subduction Factory. Arc lavas contain signature of subducted sediments. Decompression Melting. This model includes a backarc spreading center and shows contours of decompression melt production.

486 views • 17 slides

Oceanic Crust, Ophiolites and Alteration

Oceanic Crust, Ophiolites and Alteration. IN THIS LECTURE Overview of Ocean Crust Simplified petrogenetic model Structure of the ocean crust Alteration of the ocean crust Petrology of the ocean crust Overview of Ophiolites Ocean Crust vs Ophiolite Distribution of European Ophiolites

175 views • 17 slides

Igneous Rocks and Plate Tectonics

Igneous Rocks and Plate Tectonics. Mantle Melting. Raw material: Lherzolite (Ol + Cpx + Opx) First to melt is Clinopyroxene Magma is rich in Clinopyroxene + Ca-Plagioclase = Tholeiite Basalt Residual = Harzburgite (Ol + Opx) Further melting removes Orthopyroxene

298 views • 8 slides

Reviewed by Richard Fletcher

Insights to extensional processes during magma assisted rifting: Evidence from aligned scoria cones. Reviewed by Richard Fletcher. Overview. Studies of continental or passive margin rifting in and around the Ethiopian rift zone.

179 views • 8 slides

Reviewed by Richard Fletcher

Insights to extensional processes during magma assisted rifting: Evidence from aligned scoria cones. Reviewed by Richard Fletcher. Overview. Studies of continental or passive margin rifting in and around the Ethiopian rift zone.

82 views • 8 slides