Photos of minerals
Photos of minerals
Photos of gemstones

Information about rocks and minerals from the USGS and NPS
Advanced information about igneous, metamorphic and sedimentary rocks
Information for rockhounds
Geology of the Grand Canyon
Information about the Grand Canyon

Geologic Time and Fossils
Geologic time
Information about geologic time from the USGS and NPS
Click on history of life for online info on fossils and geologic time
Geological time machine
Online overview of isotopic dating methods
Reconstructions of continental configurations back to 620,000,000 years ago

Maps, Projections, Images, etc.
Fact sheet on the Universal Transverse Mercator (UTM) grid
How to read the Universal Transverse Mercator (UTM) grid
Information on Geographic Information Systems (GIS)
Online map creation
Products from the USGS EROS Data Center (air photos, satellite images)
Assorted maps from the U.S. National Park system
Tracking the North Magnetic Pole
Satellite and radar images of Hawaii; virtual field trips
Information about Geologic Maps from the USGS and NPS

General Geology and General Interest
A geologist's lifetime field list: links to photos of many geological wonders
Index of U.S. Geological Survey web sites
The Learning Web, a part of the USGS web site, is dedicated to K-12 education and life-long learning. Explore things on, in, around, and about the Earth, such as land, water, plants and animals, and maps.
Geologic and geomorphic provinces from the USGS and NPS
Geology in the National Parks
Geologic tours of National Parks grouped by geologic topics

Hydrology, Hydrogeology, and Karst
Publications and products of the U.S. Geological Survey's Water Resources Division
Water Resources of the United States
Water resources of NJ
National water use maps
Information about Mammoth Cave, KY, and general info on caves and karst
Information about ground water and drinking water from the U.S. Environmental Protection agency
Geology of caves from the U.S.G.S. and National Park Service
The Virtual Cave

Glaciers and Polar Research
U.S.G.S.'s Glacial monitoring program
The National Snow and Ice Data Center (NSIDC)
Information about glaciers from the NSIDC
The National Science Foundation's Office of Polar Programs
Information about glaciers from the USGS and NPS

Coastal Geology
California's coastal geography and geology
Information on shorelines from the USGS and NPS
U.S. Geological Survey's Center for Coastal & Regional Marine Studies

Information about sand dunes from the USGS and NPS
Great Sand Dunes National Monument (CO)
White Sands National Monument (NM)
Death Valley National Park (CA)
USGS Online Publication: Geology and resources of Deserts
Dust studies by the USGS in California and Nevada

Information about Mauna Loa volcano (HI)
Home page of the USGS Cascades Volcano Observatory
Glossary of Volcano and Related Terminology
Volcano World from the University of North Dakota
Michigan Tech's volcanoes home page
Home page of the USGS Hawaiian Volcano Observatory

CNSS (Council of the National Seismic System) world-wide earthquake catalog
Locate epicenters and determine earthquake magnitudes using this virtual course
Locate recent earthquakes worldwide at this site from the University of Edinburgh

Plate Tectonics
Information about plate tectonics from the USGS and NPS
Animations of plate tectonics from the USGS and NPS
Plate tectonic reconstructions
Plate motions from GPS
Age of the oceanic crust
Total sediment thickness in the Earth's oceans
Global digital map of sediment thickness