GEOL 1010 Lecture Notes - Lecture 4: Clay Minerals, Particle Size, Lithification
4 Oct 2016
School
Department
Course
Professor
Document Summary
Soil formation is controlled by factors that include the parent material, time, slope, and climate. Products of weathering moved by wind and water is sediment. Clastic moved by a fluid and deposited. Particle size gives an indication of: energy in the fluid (larger size = more energy, distance the material has moved (more distance = smaller particles) Sorting is the amount of different size grains present. Rounding may be a clue as how far the material has moved. Shales very small grains and mostly clay minerals (soft) Sandstones grains you can readily see with the naked eye. Angular to rounded: river sediments have many different grain sizes and shapes, beaches are commonly very well sorted and rounded. Waves are a great way to round and sort sediment: conglomerates sorting varies from poor to excellent. Angular clasts make a sedimentary breccia: biochemical. Dolomite- powder reacts with dilute acid: dunham classification how limestones are classified, organic rocks.
