January 22nd - January 22nd The Earth is 4.5 billion years old Distance Kilometers = 0.6 miles Density g/cm3 water = 1 average rock = 3

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January 22 nd The Earth is 4.5 billion years old. Distance-  Kilometers = 0.6 miles Density-  g/cm 3 , water = 1, average rock = 3 Temperature-  *C, 0*C freezing point, 100*C boiling point Pressure-  Kilobar/kb.  1 bar = air pressure at sea level; 1 kb occurs at ~3.5 km depth Time-  Anna (years) - Kilo-Anna = 1,000 years. Mega-Anna = 1,000,000 years Giga-Anna =  1,000,000,000 years. What is a mineral? 1- Definite chemical composition or range, ex: species. 2- Naturally occurring 3- Usually organic 4- Homogeneous solid (Must be solid ) 5- Crystalline structure (Atoms have a very particular arrangement; very precise) ** Not nutritional minerals What is a rock? 1- Naturally formed (No concrete!) 2- Non-living 3- Firm, coherent aggregate of solid matter ** Most rocks are composed of one or more (sometimes dozens) of minerals. Three groups of rocks:
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This note was uploaded on 04/30/2008 for the course GEOL 120 taught by Professor Maglouihlin during the Spring '08 term at Colorado State.

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January 22nd - January 22nd The Earth is 4.5 billion years old Distance Kilometers = 0.6 miles Density g/cm3 water = 1 average rock = 3

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