Tim Horner CSUS Geology Department Volcanism and Extrusive Rocks Physical Geology 13/e, Chapter 4.
Geology 103 Sedimentology and Stratigraphy Tim Horner Geology Department, CSU Sacramento
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Transcript of Geology 103 Sedimentology and Stratigraphy Tim Horner Geology Department, CSU Sacramento
Geology 103Sedimentology and Stratigraphy
Tim HornerGeology Department, CSU Sacramento
Lecture #8:
Mass movements, sediment gravity flows
Reading assignment:
Boggs, 5th ed., pp. 31-33, 38-41
SACRAMENTOSTATE
Types of mass-movements
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Table 2.1, p. 32
Features of a debris flow deposit:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 37
Matrix strength supports grains in a debris flow:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33
Grain-to-grain interaction supports grains in a grain flow:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33
Features of a grain flow deposit:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 37
Excess pore pressure supports grains in a liquified (fluidal) flow:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 42
Features of a liquified (fluidal) flow deposit:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.4.1, p. 34
Parts of a turbidity current:
Turbulence supports grains in a turbidity flow:
From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33