Section 1: Marine sand and gravel geology and resources Sources of sand and gravel on the Northern European Continental Shelf •Assessment of offshore sand and gravel bodies for dredging • The UK marine sand and gravel dredging industry: an application of Quaternary geology • The CIRIA research project on beach recharge materials • Section 2: Armourstone evaluation and shingle performance assessment • The outlook for rock armour and beach recharge • Assessment and specification of armourstone quality: from CIRIA/CUR (1991) to CEN (2000) • Meeting the demand for rock armour and its grading specification • A rock engineering rating system for assessing the suitability of armourstone • The opening and operation of the Pasir Panjang quarry: a dedicated armourstone quarry in the Malaysian jungle • Abrasion of a series of tracer materials on a gravel beach , Slapton Sands, Devon • Section 3: Aggregate testing and the use of alternative aggregates • Canadian experience with the micro-Deval test for aggregates • Assessing the wear characteristics of aggregate exposed at the road surface • Possible problems with high PSV aggregate of the gritstone trade group • A statistical study of aggregate testing data with respect to engineering judgement • An investigation of some alternative aggregates for use in concrete