4.5 GRAVITATIONAL PROCESSES
121
Fig. 4.29. (A) Maps, (B) seismic profile, and (C) TOBI sidescan sonar image illustrating a gravitational flow
that moved from the flanks of the Canary islands out into the middle of the Madeira abyssal plain. Note how
the debris flow on the slope, with its kilometric clasts, passes out into a turbidity flow on the basin floor. (From
Weaver et al., 1994, courtesy of the Geological Society of London.)
et al., 1994; Masson, 1996; Masson et aL, 1998). The resultant sediments include deposits
of several types, described next.
4.5.1 Debris Flow
A debris flow is defined as a "highly-concentrated non-Newtonian sediment dispersion
of low yield strength" (Stow et al., 1996). This includes mud flows, though not all debris
121
Fig. 4.29. (A) Maps, (B) seismic profile, and (C) TOBI sidescan sonar image illustrating a gravitational flow
that moved from the flanks of the Canary islands out into the middle of the Madeira abyssal plain. Note how
the debris flow on the slope, with its kilometric clasts, passes out into a turbidity flow on the basin floor. (From
Weaver et al., 1994, courtesy of the Geological Society of London.)
et al., 1994; Masson, 1996; Masson et aL, 1998). The resultant sediments include deposits
of several types, described next.
4.5.1 Debris Flow
A debris flow is defined as a "highly-concentrated non-Newtonian sediment dispersion
of low yield strength" (Stow et al., 1996). This includes mud flows, though not all debris