GEG 3102 Lecture Notes - Lecture 9: Geomorphology, Quartzite, Partial Pressure
5 Dec 2016
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Document Summary
Landforms and landscapes created by the dissolution and precipitation of bedrock. Development & exploitation of secondary porosity (by water) Secondary porosity: changes in porosity after the rock is formed. Aquifers: very important as many people depend on them. Very productive aquifers, but extremely vulnerable to pollution. Water flows very easily through them, so there is little to no filtration. When building wells there must be a 30 day delay between when the water hits the surface & when it reaches the place where it will be consumed. Host material: caco3 frequently comes from skeletons (endo - & exo-) Karst environments are most frequently found limestone, but also found in gypsum, sandstone, quartzite (metamorphosed sandstone, very hard) Quartz is not very soluble in water, so requires time and stable conditions. Development: can be at the surface and below the surface, & produces landforms through erosion & deposition. Not very resistant to water weathering (compared to other rocks)
