In a conglomerate, the coarse grained clasts are well rounded, indicating that they spent considerable time in the transportation process and were ultimately deposited in a high energy environment capable of carrying the large clasts.

What are rounded clasts?

Clasts visible to the naked eye. ... Clasts vary in shape from rounded to angular, depending on the distance they have been transported and / or the environment of deposition, e.g. rounded clasts are generally the product of long transportation distances and / or deposition in high energy environments (beaches, rivers).

What causes clasts?

Clasts are locally sourced from low-energy floodplain or channel abandonment deposits that have slumped and often represent the process of bank collapse and erosion due to shifts in orientation or migration of the channel.