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SACRAMENTO. STATE. Geology 103 Sedimentology and Stratigraphy Tim Horner Geology Department, CSU Sacramento. Lecture #8: Mass movements, sediment gravity flows Reading assignment: Boggs, 5 th ed., pp. 31-33, 38-41. Types of mass-movements.

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geology 103 sedimentology and stratigraphy tim horner geology department csu sacramento

SACRAMENTO

STATE

Geology 103Sedimentology and StratigraphyTim HornerGeology Department, CSU Sacramento

Lecture #8:

Mass movements, sediment gravity flows

Reading assignment:

Boggs, 5th ed., pp. 31-33, 38-41

slide2

Types of mass-movements

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Table 2.1, p. 32

slide3

Features of a debris flow deposit:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 37

slide4

Matrix strength supports grains in a debris flow:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33

slide5

Grain-to-grain interaction supports grains in a grain flow:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33

slide6

Features of a grain flow deposit:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 37

slide7

Excess pore pressure supports grains in a liquified (fluidal) flow:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33

slide8

Features of a liquified (fluidal) flow deposit:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 42

slide9

Parts of a turbidity current:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.4.1, p. 34

slide10

Turbulence supports grains in a turbidity flow:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.6, p. 33

slide11

Features of a turbidity flow deposit:

From Boggs, Principles of Sedimentology and Stratigraphy, 5th ed., Figure 2.7, p. 37

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