I: ice Ice Age ice core ice sheet ice wedging Iceland igneous igneous intrusion igneous petrologist igneous rock image Immanuel Kant impact impact crater impact creep Imperial Valley impermeability impermeable IMS incised incised meander incision inclusion index fossil India Indian Plate industrial age industrial mineral Industrial Revolution industry infiltration InfoBank Information Bank Information Specialist infrared radiation initial ground motion injection barrier inlet inner core insect instrument intensity Interactive Map Server intergrowth Interior Highlands interior of the Earth Interior Plains intermediate species internal heat engine International Date Line interplate interplate coupling interruption intersecting pattern intraplate introduction intrusion intrusive igneous rock intrusive rock invertebrate Io ion Iran iron iron ore iron oxide irrigation Isaac Newton island island arc isoseismal line isostasy isothermal isotope isotopic ratio Italy
U.S. Department of the Interior | U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/I_keywords.html Page Contact: InfoBank staff Page Last Modified: Tue Dec 16 06:27:34 PST 2008 (wcs)