GEOLOGY 1 Lecture Notes - Lecture 22: Weathering, Clastic Rock, Lithification
Document Summary
Derived through the weathering an d erosion of preexisting rocks. Form by transport and accumulation of fragmental materials (sediments) or dissolved products, from source region to a site of deposition. (biogenic or inorganic) Sediments are constantly being produced at the earth"s surface and sedimentary deposits are widespread. Organic (ie coal and think fleshy part) Classification: clastic (detrital): made from sediments that come from pre-existing rocks that have been weathered (broken down into smaller pieces) transported then glued together (lithified). Criteria: particle size and maturity: chemical: made from mineral crystals that formed from chemical or bio precipitation form water at earth surface temps. Criteria: mineral composition: assume for all of these that most" is one of these classifications. Moraine: pile of sediment produced by glacier. Reaction between minerals and water to form new materials and/or dissolved ions. Carbon dioxide dissolves in water to make a weak acid (carbonic) Physical weathering works with chemical to accelerate weathering by increasing surface are.
