GeologyRocks

The five part deposit produced by a waning turbidite flow. The deposit is split into:

• Structureless massive sand with gravel-rich erosional base.
• Parallel bedded sands produced by the upper flow regime.
• Cross laminated sands with ripple marks.
• Deposited in the lower flow regime.
• Laminated silts.Fine pelagic muds.

A typical Bouma sequence is illustrated below, although all five units may not be developed in each flow:

Bouma Sequence		Facies
E		Pelagic and hemipelagic muds
D		Laminated silts
C		Cross laminated sands. Ripples
B		Parallel laminated sands
A		Massive Sands with a gravelly base
		Scoured base with tool and prod marks