Textural parameters showed that coastal grains did not extend into the interior of the sedimentation basin.

Analysis of quartz grains gave more credibility to palaeoenvironmental interpretations.

Grain size and compositional data did not clearly pinpoint the palaeoenvironments.

Mechanical microtextures indicated predominance of quartz grain related to a fluvial system.

Chemical microtextures indicated low energy environments and under marine water influence.