Current good practice in geology is to identify volcaniclastic rocks using a descriptive classification scheme. The terms agglomerate, volcanic breccia and tuff are currently used in both a descriptive and genetic sense, in BS 5930 (1999). However, the definitions used are now considered incorrect in both senses. This technical contribution redefines these terms and places them in a modern geological context. A new descriptive classification scheme for identifying and naming volcaniclastic rocks is proposed that will assist engineering geological descriptions of these rock types.

You do not have access to this content, please speak to your institutional administrator if you feel you should have access.