Honduras. Instituto Geografico Nacional. American Association of Petroleum Geologists (AAPG) Companion text: Geology of the Bay Islands, Gulf of Honduras / Alexander R. McBirney and Manuel N., Bass. Tectonic relations of northern central America and the western Caribbean : the Bonacca expedition. [S.l : American Association of Petroleum Geologists. Memoir no. 11. 1969. 229-43 p. North Decimal Degree 16.533300. South Decimal Degree 16.3667. East Decimal Degree -85.7500. West Decimal Degree -86.0000. Alternate title: Mapa geologico Guanaja, Honduras, C. A. In upper margin: Geologia Honduras 1:50,000. Universal transverse Mercator projection. Relief shown by 20 m. contour interval and spot heights.