About this map:

This map shows the locations of springs that issue from rocks above sea level. They drain isolated groundwater bodies that are separate from the Northern Guam Lens Aquifer (NGLA). Locations of springs are based on United States Geological Survey (USGS) topographic map of Guam, 1:24,000. Attributes in the GIS data file are based on Taboroši, D. (2002), Karst features of Guam [MSc thesis], University of Guam, Mangilao, 324 pp.