GLG 111 Pt 2 - Clay minerals + Iron oxide minerals + stuff...

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GLG 111 Pt. 2 Obsidian is a volcanic glass Forms due quickly cooling of volcanic lava. Sediment: Sedimentary Rocks Made up of pebbles , sand and mud Found on the top soil of the crust. Sediment- Loose material derived from the breakdown of pre-existing rocks at the surface of the Earth. Sedimentary Rocks- A body of sediment turned into rock. 8% of the crust 75% rocks at the surface are sedimentary rocks Rocks weather at the surface of the earth and cause them to be sedimentary. Two Types of Weathering: Physical/Mechanical Weathering o Rock and mineral fragments Chemical Weathering o Feldspar + acid (H 2 0 + CO 2 ) Carbonic Acid Found in rain o Iron-magnesium silicates + acid
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Unformatted text preview: Clay minerals + Iron oxide minerals + stuff in solution o New minerals (mostly clay), stuff in solution How to make a sedimentary rock: Weathering Erosion Transportation Deposition Lithification What are the agents between erosion and transportation? o Water o Wind o Glaciers Deposition has o Layering Lithification(2): o Cementation Cement Calcite Quartz CaCO 3 o Iron oxide Minerals Classification of Sedimentary Rocks: Detrital/Clastic Sediments/Sedimentary Rocks Sediment Rock Boulders Pebbles Gravel Sand (mostly quartz) Conglomerate Sandstone...
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GLG 111 Pt 2 - Clay minerals + Iron oxide minerals + stuff...

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