Conglomerate

Introduction: Conglomerates are waterworn rocks such as boulders, cobbles and pebbles that have become cemented together. Pebbles might be smooth and well-rounded which is an indication of abrasion due to extensive transport. A highly angular and jaggered shape indicates that little transportation or reworking was involved. Pebbles are always larger than 2mm in diametre and some conglomerates have boulders that are over 2m in diametre.

Distribution: Waterberg and the Chuos deposits.

Composition: A wide variety of consolidated gravels and pebble types.

Colouration: Various colourations are possible depending on the location of the rocks. For example a mixture of minerals and rock types can be set in a translucent grey chert matrix. White vein quartz will colour a pebble, as will black carbon specks.

Uses: Building and landscaping.