Tuesday 09-29-15 Notes
Tuesday 09-29-15 Notes GEOL 1200 - 003
Popular in Physical Geology (no lab)
GEOL 1200 - 003
verified elite notetaker
Popular in Geology
This 3 page Class Notes was uploaded by Keely Haggar on Tuesday September 29, 2015. The Class Notes belongs to GEOL 1200 - 003 at University of North Carolina - Charlotte taught by Jake Armour in Summer 2015. Since its upload, it has received 18 views. For similar materials see Physical Geology (no lab) in Geology at University of North Carolina - Charlotte.
Reviews for Tuesday 09-29-15 Notes
Report this Material
What is Karma?
Karma is the currency of StudySoup.
Date Created: 09/29/15
092915 Geology 1200 Copper silver and gold show up in hot places San Juan volcanic fields have cooler underground magma Its fairly cool and old system so it does not raise much alarm Test Prep 60 MC Covers Ch 15 only You may have one 8 z x 11 sheet of notes Review Power Points Use mastering geology Imagine all minerals found in igneous rocks were the same color What info would you no longer be able to infer from observing a rock sample a Magma cooling rate b Composition c Texture Ans B Composition What controls the type of igneous rock you get from a melt 1 Rate of Cooling 2 Composition Granite Slow cooling big crystals leading us to understand it was cooled below the surface Rhyolite Fast cooling small crystals leading us to understand it was cooled at the surface gt Chances of making Rhyolite are really small it s more likely to make granite o Rhyolite Light 0 Granite Heavy I Why Intrusive Phaneritic Extrusive Aphanitic Plutonic Volcanic Felsic Granite Rhyolite Intermediate Diorite Dacite Andesite Mafic Gabbro Basalt Ultra mafic Peridotite Komatiite Ultramafic Form on the ocean floor really dark dense gt Peridotite would have large chunky crystals and komatiite would not COLOR AND TEXTURE The biggest way to identify rocks and how they were formed Granodiorite Not totally intermediate not totally felsic but right in between and entirely intrusive gt Rhyodacite Glassy rocks do not fall on this scale cooled so fast that the ingredients didn t have time to form a structure Obsidian What controls what type of igneous rock you get from a melt gt Composition of the melt gt Temperature is the necessary component of a group of rocks that form from fire 0 Effects which minerals form Bowen s Reaction Series How to get Mafic vs Felsic melt 1 Differentiation Main concept image example a Liquid hot magma below surface high temp is mafic very dark colored b Eventually these chambers cool and recede and at lower temperatures crystallization and settling occurs leaving you with Felsic melts Silica rich You now have an intermediate extrusive lava flow i The cooler the lava gets the slower it flows Viscosity ii The magma chamber cools entirely eventually making it inactive 2 Partial Melting 3 Assimilation and Mixing Based on its characteristics what name would you give the lightintermediate colored coarse grained igneous rock sample a Granite b Rhyolite c Gabbro d Granodiorite e Andesite Ans D Granodiorite Two Categories of Igneous Rocks Intrusive Cooled from melted rock below the earths surface magma 143146 gt Ex Half Dome Yosemite 0 Strong rocks 0 These rocks have been exposed are not easy to erode O Extrusive Cooled from melted rock above the earths surface lava gt Ex Hawaii rocks volcanoes oceanic crust o Basalt o Crumbly weak 0 Most extrusive rocks occur at plate boundaries Different Magma Intrusions gt Igneous Bodies o Volcanic Neck 0 Dike o Sill o Vein Laccolith Subsurface Volcano 9 Pluton Frozen magma chamber 9 Batholith Linked Plutons Different igneous intrusions are identified and named based on a Composition it is not this b Texture c Density d Shape and size e Explosivity Ans D Shape and size Types of Volcanoes gt Shield Volcanoes Low relief shapes gentle slopes large and wide gt Cinder Cone Cone shaped pile of cinders steep sides gt Stratovolcano Large cone shaped extremely steep sides