Northern Guam geospatial information server
Geology of northern Guam
The northern Guam is the limestone plateau comprising the northern half of the island. The plateau is separated from the uplifted volcanic highlands in the southern half of the island by the large NW/SE-trending Pago-Adelup Fault. Elsewhere, the plateau is fringed by cliffs that rise precipitously over the sea or by a narrow coastal terrace. The plateau has a generally modestly-sloping, concave-upward surface, and is tilted from an elevation of about 60 m at Amantes Point at the SW to 150 m elevation at Pati Point on its NE corner and 180 m at Ritidian Point, its NW extreme.