Lancaster (geology, Arizona State U.) reports on investigations of dune forms, processes and sediments in the Namib Sand Sea of southwestern Africa, which are used to develop models for the formation of dunes and sand seas and their rock equivalents. Annotation copyright Book News, Inc. Portland, Oregon, USA.Contents: Regional physiographic & climatic setting; Dune morphology & morphometry: Dune sediments; Dune processes; Controls of dune morphology; Accumulation of the sand sea. References; Appendices.