This rock consists of angular and rounded pebbles, varying in size and set in a fine, unconsolidated matrix of clay or sand.
The glacial fragments included in the boulder clay are called glacial erratics. These are fragments carried away from their place of origin by the ice. They can be of assistance to geologists in helping them work out the general direction of ice movement.
This is a yellowish or brownish clay made up of very small particles of quartz, feldspar, calcite, and other minerals and rock fragments.

TEXTURE The fragments in boulder clay are mainly angular. The rock is made up of various unsorted materials, ranging from clay size to boulder size.

ORIGIN Boulder clay usually forms as a deposit from melting glaciers and ice sheets.

Grain size: Fine

Classification: Detrital

Fossils: Rare

Grain shape: Angular, Rounded