Fanbase

Circumstances

The lower part of the alluvial fan.

Sedimentary facies (Sediments)

A matrix and gravels originated from the basements which is a part of mountains. Sands and rounded to angular gravels including pebbles to granules. The upward-fining units composed of conglomerate - sandstone - siltstone are repeated. The basal conglomerate of each unit has sheet form. The siltstone beds are poorly sorted.

Sedimentary facies (Structures)

The conglomerate beds and sandstone beds do not erode the lower beds. Planar and trough cross-stratification.

Sedimentary facies (Fossils)

Trace fossils of burrows.