Details Title: EOS 11 Test 2 Description: Rocks for Jocks.. Total Flash Cards: 17 Created: 11/05/2008 17:51:44		New Users: To study from this flashcard set, or to create your own your own study flash cards, REGISTER HERE. Existing Users: CLICK HERE. Additional Geology Flashcards
Cards in this set: Term mafic rock Definition rich in iron and magnesium Term silicic rock.. order of silicic->mafic Definition rich in silica.. silicic, intermediate, mafic, ultramafic Term layers of Earth Definition crust: silicic (continental), mafic (oceanic). mantle: ultramafic outer core: liquid iron and nickel inner core: solid iron and nickel Term stratification Definition formation of layers of Earth Term how are igneous rocks formed Definition solidification of a melt Term two types of melt and descriptions Definition magma-melt in interior of Earth lava-at surface Term melting temps of rock on surface Definition 650-1110 degC Term how hot does it get in the different layers? Definition (state,behavior) crust(solid,brittle): 0-500C lithospheric mantle(s,b): 500-1280C asthenospheric mantle(s,ductile): 1280-...C inner core: up to 4300C Term how do rocks melt to form magma? (different melting) Definition heat-transfer melting (inc temp) decompression melting (dec pressure, lower mp of rocks) flux melting (change chem of rock.. ex. adding volatile elements like water or carbon dioxide dec mp of rocks)...Slide 15 .O {font-size:149%;} Volatiles like water and carbon dioxide get squeezed out of the subducting slab and seep into the overlying solid lithospheric mantle causing it to melt Term two types of igneous rocks and descriptions Definition Intrusive: Slide 17 .O {font-size:149%;} -igneous rock that solidified inside the Earth -solidified from a magma -coarse grained Extrusive: Slide 17 .O {font-size:149%;} -igneous rock that solidified on the surface of the Earth -solidified from a lava -fine grained         Term silicic igneous rock Definition 66-76% silica granite-intrusive Term intermediate igneous rock Definition 52-66% silica diorite-instrusive Term mafic igneous rock Definition 45-52% silica gabbro-instrusive Term ultramafic igneous rock Definition 38-45% silica, ultrabasic (high in Mg/Fe) peridotite (dominant in upper mantle) Term how to get magmas of different compositions? Definition partial melting (rocks and chocolate eggs)(describe the process in magma chamber) fractional crystallization assimilation Term intrusive rock settings Definition dike (ex.shiprock,nm , grand canyon sill (ex.transantarctic mts) laccolit-blister sill pluton (large km ones=batholiths) (ex.yosemite, Torres del Paine NParks) Term Definition