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Lecture

3032 Week2


Department
Geology
Course Code
GEOL 3032
Professor
All

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This Week:
Complete sedimentary textures
Principles of stratigraphy and bedding
Introduction to hydrodynamics and sediment transport
Field trip vans LEAVE at 2:00 Tuesday and
Thursday from south Geology parking lot.

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Sedimentary Textures: Outline
Particle shape
Form (sphericity), roundness/angularity
Significance of shape
Surface textures
Grain size
Measurements and scales
Treatment of grain-size data (graphic and mathematical)
Mean, mode, median, sorting, skewness, and kurtosis
Applications and importance of granulometric data
Sedimentary Fabric
Grain orientation
Packing, grain-to-grain orientations, porosity

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Packing, Pore space, and Porosity
Porosity = Fractional volume of pore space in unit volume
0 1, Porosity of 0.5 means half the sediment volume is
occupied by open pores
Influenced by sorting and packing
Poorly sorted sediments can have lower porosity
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