Review Session 1

Review Session 1 - Accreted from planetesimals within the...

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Unformatted text preview: Accreted from planetesimals within the solar nebula, initially homogenous planets became molten and physically and chemically segregated. The inner planets have dense, metal-rich inner cores, less-dense mantles, and outer crusts formed from the least dense materials. The chemical implications of a differentiated Earth are profound. You only need to consider a relatively small number of elements as we study the rock- forming minerals. Minerals -- the building blocks of rocks naturally occurring- not made by humans solid - not liquid or gas crystalline substances- regular internal arrangement of atoms, repeating in an orderly 3D array (called a lattice)- not a glass or amorphous inorganic- not composed of organic carbon (having carbon in the 0 oxidation state bound to carbon and hydrogen) but can be made by organisms specific chemical composition- fixed or varies within well defined limits Minerals Classified by chemical composition, the major groups are: silicates (quartz, SiO 2 ) carbonates (calcite, CaCO 3 ) oxides and hydroxides (hematite, Fe 2 O 3 ) sulfides (pyrite, FeS 2 ) sulfates (gypsum, CaSO 4 2H 2 O) halides (halite, NaCl) Typically, only about 30 minerals are common in rocks....
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This note was uploaded on 04/11/2008 for the course MDST 201 taught by Professor Hayden during the Spring '08 term at UVA.

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Review Session 1 - Accreted from planetesimals within the...

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