New excuvation showing continuation of clay and gravel bed deposits further down stream

The image below shows the  deposit discoloured by the top soil higher up.

The image above shows an isolated layer of sand and fine gravels marked by the lower glove.

I believe the deposit rises a lot higher than the level marked with top yellow glove.

Packed gravels and sand layer below the  layers then a dense red clay beneath the gravels and sands.

The isolated sand and gravel layer above apparently separating the main  deposit.