About this map:

This map provides a simplified look at the structural geology of northern Guam. The geospatial information was taken from the detailed geologic map of Guam, produced by Siegrist, H.G. and Reagan, M. (2008) as a reinterpretation and revision of the Geologic Map of Guam by Tracey et al. (1964). The map was georeferenced and individual features digitized.