Description:Zeolites are hydrated aluminosilicates of the alkaline and alkaline-earth metals. About 40 natural zeolites have been identified during the past 200 years; the most common are analcime, chabazite, clinoptilolite, erionite, ferrierite, heulandite, laumontite, mordenite, and phillipsite.
10. Water use in the United States, from USGS Water-Science School
Description:StreamStats version 4 is a Web application that provides access to an assortment of Geographic Information Systems (GIS) analytical tools that are useful for water-resources planning and management, and for engineering and design purposes.
Description: STATION.--03106500 SLIPPERY ROCK CREEK AT WURTEMBURG, PA LOCATION.--Lat 40`53'02", long 80`14'02", Lawrence County, Hydrologic Unit 05030105, on left bank at downstream side of highway bridge at Camp Allegheny, 2 mi north of Wurtemburg, and 2.8 mi upstream from mouth.
13. Earthshots: Satellite Images of Environmental Change