School of GeoSciences

School of GeoSciences

Siccar Point Field Excursion Preview

The Old Red Sandstone Basal Breccia

The breccia consists of angular, flattened pebbles that are often imbricated. The imbrication indicates that the pebbles were deposited in fast flowing currents. In the field, remember to look for imbrication of the pebbles.

Imbricated pebbles