Scale 1:250,000. [1 cm = 2.5 km] ; Transverse Mercator projection (W 112 0--W 110 0/N 29 0--N 28 0).
Geological formations, stratigraphic layers and fault lines indicated by use of color overprints and shading. Shows highways and roads, boundaries, airports, rivers and streams, and other details. Includes location index map. On verso: "Información complementaria" and "Edades de las rocas y suelos". Includes bibliographical references. A topographic edition of this map also exists. Relief shown by contours and spot heights.