Geob Lect3.2.docx

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School
University of British Columbia
Department
Geographical Biogeosciences
Course
GEOB 103
Professor
Carles Ferrer- Boix
Semester
Spring

Description
Geob Lect. 3 2 01/23/2014 How are sedimentary rocks classified Sedimentary Rocks as ancient environment classification Clastic Rocks ­> Texture (Slide 30) Grain size Sorting Well sorted (Few classes/sizes) – beaches are well sorted and have uniform sand Poorly sorted (many classes/grain sizes) Rounding Sharp edges turing into rounded edges (Abrasion) Gravel (Slide 31) Sand Mud Chemical sedimentary rocks (and biogenic) (slide 33) Biogenic means organic (Biologic precipitation) Calcite = limestone  Quartz = Chert Evaporation of water (Evaporites) = precipitation of dissolved ions Halile ­> Rock salt Gypsum ­> Rock Gypsu
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