Geologists from the U. of Wyoming and U. of Reading provide a well- illustrated analysis of the island of Tobago, West Indies. Tobago provides an opportunity to study compositional and structural variations of an ancient oceanic-arc sequence at contrasting structural levels. A greenschist-to-amphibolite-facies metavolcanic and metasedimentary schist belt forms the footwall block, while an Albian ultramafic-to-tonalitic plutonic suite and coeval Tobago Volcanic Group form the hanging-wall block of the plastic-to-brittle Central Tobago normal- sense fault system. There is no subject index, but pockets inside the front and back covers contain three b&w and one color map. Annotation c. Book News, Inc., Portland, OR (booknews.com)