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Geosciences 443Sedimentary Petrology
September 1, 2010
Miocene basal Six Mile Crk Fm, Coberly Gulch
White Sands Natl. Mon, NM
K turbidites, Baja
Sedimentary textures
Textural considerations:
• The phi scale, devised by Krumbein,• is computed by the following equation:
1) Grain size2) Grain shape3) Degree of sorting
(2-(phi)) = mm
Sediment sorting
Jurassic Navajo ss
Camb Vaughn ss
Sphericity
Rounding
Modern gravel beach, Baja
Strandline debris, Great Salt Lake
ClastOrientation
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