 As a result of the fractured, porous bedrock at Cerro Amay, rainfall does not pool and there are few streams.Instead, precipitation descends deep into the earth until a non-porous stratum is reached and subterranean water flows northward until much of it surfaces as springs and waterfalls at an elevation of approximately 1,350 meters above sea level into the drainage of the Cuatro Chorros River.Some of the limestone bedrock is somewhat fossiliferous but metamorphosis has rendered many fossils of poor quality.