Lateritic Gravel : A surface or near-surface accumulation of hard nodular iron oxide particles, often with aluminium hydroxide and kaolin clay, which has formed as a result of rock weathering under warm, wet climatic conditions
Peter Milne and Kieran Sharp, ARRB Group, and Bob Ungers, consultant, Austroads Glossary of Terms (4th Ed.), Austroads Ltd., Sydney, NSW, Australia 2010. http://www.bicyclensw.org.au/files/u1/Austroads_Gl ossary_of_Terms_4th_edition.pdf (Road Trfc and Transp Sfty - Brit) {529}