Grenada is the southernmost of the string of Islands composing the Lesser Antilles, if we except Trinidad and Tobago, some ninety odd miles further south, which lie close to the South American mainland of Venezuela. Geologically the Island is volcanic; basalts, lavas, cinder beds, gravel beds, agglomerates, various earths or clays forming the soil and subsoil of valleys, slopes, ridges, cones and craters, from sea-level to some 3,000 feet of elevation.