Northern Guam geospatial information server

Surface geology (simplified map)

About this map:

This simple geologic map of northern Guam indicates the distribution of fundamental terrain types. The map is based on the newest geologic map of Guam by Siegrist, H.G. and Reagan, M. (2008), who reinterpreted and revised the Geologic Map of Guam by Tracey et al. (1964).

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