Caldera 1 : A caldera is a large, more or less circular-shaped volcanic collapse feature which forms when magma is either withdrawn or erupted from a shallow underground magma reservoir
Jan Lindsay, Jerome David, John Shepherd and Judith Ephraim, Volcanic Hazard Assessment for Saint Lucia, Lesser Antilles, Glossary Of Terms Used In This Report, Seismic Research Unit The University of the West Indies St. Augustine Trinidad and Tobago 2002. file:///C:/Users/user/Downloads/1001.pdf, (ND/ Volc Emr - Brit) {963}
