10 - 1/14/10 GEOLOGIC CYCLE * The vast cycling of material...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1/14/10 GEOLOGIC CYCLE ** The vast cycling of material that occurs in and on the lithosphere, encompassing the * the building and wearing down of landforms * 3 components: 1) hydrologic cycle: movement of water (H 2 O) Fig 2.4 pg 37 2) tectonic cycle: movement of crustal material and magma Fig 2.8 pg 41 3) rock cycle: formation of the three basic types of rocks ROCK CYCLE What are rocks? * mineral : an element or combination of elements that forms an inorganic natural compound which has specific qualities, such as a unique crystalline structure, hardness, etc (pg 52-78) Ex: Silicates, based on silicon(Si); Carbonates, carbon(C) (These together make-up 90% of all minerals.) * 3000 minerals, only about 10-20 make up 90% of the crust * rock : an assemblage of minerals bound together, usually 2 to 5 different minerals. * thousands of rock types, but all the result of 3 rock-forming processes – igneous (sea floor, granite, only way to get igneous rock is to cool magma), sedimentary (sand at beach, mud in lake, etc) , & metamorphic (change in rock-rearranging of minerals in other rocks to form metamorphic rocks) ** the interactions/interrelationships between these 3 processes is the Rock Cycle (diagram of the Rock Cycle follows) * Formed by the solidifying and crystallizing of magma * intrusive types form within the crust (magma didn’t make it to the surface- inside) ; plutons, batholiths, laccoliths *many mountains and ranges are exposed to plutons; Sierra Nevada, Coast Range, Stone Mt. (GA) *good example- granite * extrusive types form on the surface of the crust (outside) as lava or basalt *may cool fast creating a fine-grained structure or slow creating a coarse grained structure ex: granite, diorite, andesite, basalt
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
*formed from existing material by weathering, erosion, transport, and deposition. * lithification -- the cementation, compaction and hardening of sediments into rock. * 2 main types of sediments: 1) clastic - bits and pieces of former rocks (can see the sediments that made it up) ex: conglomerates, chale, siltstone, sandstone 2) non-clastic or chemical – minerals dissolved in solution (water) ex: limestone, coal, evaporities (salts), chalk, gypsum *Formed from existing material by physical and/or chemical change under high pressure and/or high temperature
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/17/2011 for the course GEOG 1113 taught by Professor Hodler during the Spring '08 term at University of Georgia Athens.

Page1 / 6

10 - 1/14/10 GEOLOGIC CYCLE * The vast cycling of material...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online