Delta front

Synonym

Fore set bed

Depth of water

Continental shelf

Circumstances

The front slope of delta where sands and gravels deposit forming foreset lamination. Sands and gravels deposit at 20 - 25 degree, the angle of repose in water.

Sedimentary facies (Sediments)

Upward-coarsening sands and gravels. Gravels smaller than a few cm in diameter associated with bioturbated sands, or sandy silt to silty sand. Gravel beds are inclined at 20 - 25 degree toward the sea side intercalating mud beds.

Sedimentary facies (Structures)

Cross-stratifications inclined toward the sea side. This cross-stratifications are formed by progradation of sediments on the slope of the angle of repose. Sediments subjected to strong bioturbation.