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In these Lecture Slides, the Lecturer has discussed the following key points in his class of Stratigraphy : Turbidity, Deposits, Deep Sea, Turbidites, Current Anatomy, Flow Unsteadiness, Bouma Sequence, Grain Support, Mechanism, Pure Grain
Typology: Slides
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From Saller et al., (2004)
Delta front
Shelf
Canyons
Sinuous turbidity current channel
3 Principal Mechanisms
From Strachan (2002)
0 1 10 20 50 x (km)
5º slope
1º-5º <1º (^) <1º ±0º ±0º
200 From Leeder (1999) (^) Var fan channel after 1979 Nice airport slope collapse
top
base
Massive bed
Upper stage plane beds
Ripples
Finely laminated
Deposition is too rapid for dunes to equilibrate with the flow
The bedform stability field of dunes is too narrow to allow their formation
Grains available for deposition are too fine (i.e. < 0.1 mm) to allow dunes to develop
grain-size parameter
mobility parameter
0.1 1 10
1
10
ripples
dunes
upper plane bed
lower plane bed
no movement
Top -missing Bouma-sequence (no Tcde)
