Economic geologist Paul Lindberg used a 3D model to educate local citizens at a meeting hosted by the Verde River Citizens Alliance Saturday. Lindberg showed that Prescott, Jerome, and Verde Valley geology are similar to the Grand Canyon's. He taught how the porous nature of  redwall limestone in the Sedona area, and the limestone caves underneath, are excellent conduits of percolating water that travels to areas like Page Springs, eventually ending up in the Verde River. Lindberg said water in the artesian wells bubbling to the surface in Page Springs can be decades or centuries old by the time it works its way through the geological conduits. A geological engineer for 47 years, Lindberg has studied the Verde Valley area since moving here in 1971. He has worked for various holders of  mineral properties in the Jerome Mining District, Canada, Peru, Saudi Arabia, Tasmania, Alaska, and other areas within the United States. Currently studying the geology of six underground limestone water-bearing caves in the Sedona area, Lindberg intersperses work projects with the teaching of geological structure and processes to academic, government and recreational groups. Lindberg said he is highly committed to helping people understand the structure of the earth.