The Los Chocoyos Ash, Guatemala: A Major Stratigraphic Marker in Middle America and in Three Ocean Basins

Abstract
The Los Chocoyos Ash, Guatemala: A Major Stratigraphic Marker in Middle America and in Three Ocean Basins - Volume 13 Issue 3 - John W. Drexler, W. I. Rose, R. S. J. Sparks, M. T. Ledbetter