Mars Geology
Photos, rocks and articles about our little sister planet.

Current Earthquakes
When you want to know right now, use one of the real-time or near real-time sites listed here.

Current Eruptions
Bulletins, links, and live cams for volcanoes that are currently going off.

Current News in Earth Science
The ten top places to go for the latest and most authoritative news in Earth science as well as related fields.

Earth Science Basics
Textbooks, glossaries, introductions, diagrams, reference materials, geologic time charts, simple questions answered, and other useful things.

Famous Earth Scientists
Online biographies of some great people who built the field of Earth science during the last several centuries, including some who are still at work.

Geology-Related Weblogs
Weblogs by geologists or about geologic subjects.

Climate Change
Scientists, not advocates, discussing scientific, not policy matters related to greenhouse gases and global warming.

Earthquake Lists
Master page for all earthquake-related lists, including hazards, preparedness, current events, seismology, regional seismicity, historic quakes, and earthquake prediction.

Evolution
The greatest lesson we have learned from geology—how it works and why creationism is wrong for your school.

Fossil-Related Subject Lists
A set of Subject lists related to fossils: dinosaurs, other species, evolution, extinction, basic facts, paleontology, and spectacular localities (lagerstatten).

Gems & Precious Stones
The geological side of these beautiful minerals.

Geo-Cams
Live cameras trained on subjects of geologic interest around the world. Divided for your convenience by region: Americas, Europe-Africa, Asia, Pacific, and the polar regions.

Earth Science Maps
A master page for maps of all kinds--bedrock, gravity, bathymetry, paleogeography--for all places, including the whole Earth itself.

State Geologic Maps of All 50 States
Look here at the rocky foundation of your state. All 50 American states are online here.

Geophysics
The deep Earth, near-Earth space, magnetics, geodesy, and gravity.

Travel for Geologists
Places to visit of interest to geologists, or those who think like them.

Glaciers and Polar Science
The Arctic, Antarctica, icy places in between, and Ice Ages.

Impacts and Craters
Comets and meteors and their craters, treated as geologic agents.

Jobs in Geoscience
Lots of sites to find employment and prepare for the job search.

Minerals and Mineralogy
Mineral resources, plus minerals from acanthite to zoisite, are all here.

Pictures of Geologic Subjects
Places to feast your eyes on photographs of geologic interest—landscapes and beyond.

Plate Tectonics
Introductory and general sources about this important theory of the Earth.

Geology Poetry
Celebrating poets who venture into geology and geologists who venture into poetry.

Rock Types and Stone Stuff
Master page for material about rocks, petrology, and stone's uses in art and commerce.

Earth Science Scales
Official scales for earthquake magnitudes, mineral hardness, volcanic eruptions, space weather events, and cosmic impacts.

Teachers' Resources K–12
Lesson plans, standards, and inspiration for the people who make kids fall in love with Earth science.

Tsunamis
Tsunamis or tidal waves, where they're happening and why they happen.

Volcano-Related Links
Master page for several different link lists about volcanic subjects: volcano home pages, observatories, hazards, eruption news, and volcanology links.

Water and Hydrology
Water and groundwater may be the future's most important world resource. Learn more here.

Geology-Related Webrings
The most complete list on the Web of self-organized collections of sites devoted to Earth science, or sometimes just Earth-related wackiness.

Fossils Other Than Dinosaurs
Dinosaurs are just one group of ancient fossil creatures. Here are trilobites, foraminifera, horses, humans, fishes, plants, and lots more.

Fossil Basics
How to find, preserve, display, and just enjoy pictures of fossils.

Volcano Observatories
Sites of major scientific centers that focus on more than one volcano--or maybe just one very important one.

Volcano Home Pages
Yes, VolcanoWorld has them all, but you can find dedicated sites for specific volcanoes faster here.

Volcano Science
Links, articles, and publications focusing on the science of volcanoes and the scientists who practice it.

Caves and Speleology
Sites about the science of underground caverns—the rock formations and the processes that formed them; also a few big lists for sport caving.

Dating Methods
Links about the ways we know how old rocks are.

Paleontology
Going beyond the surface: how did prehistoric life actually live? what are professional fossil scientists working on? what can computers do with fossils? and more.

Odds and Ends
Weird, interesting, and unclassifiable stuff related somehow to geology.

Dinosaurs
A few dozen of the most interesting and useful dinosaur sites out there.

Extinction
The flip side of evolution—links on the destiny of species.

Sprites and Other High-Atmosphere Lights
Fleeting ionospheric flashes called sprites, elves, rolls, blue jets, and more, are a lively new field of research. Links to the latest here.

Online Journals & Articles
Free reading that ranges from kid-friendly to seriously scientific.

Forensic Seismology
Doing long-distance detective work through analysis of seismic records.

Infrasonics
Ultralow-frequency sound is a cousin of seismic waves, and infrasonics is a fascinating science as well as a vital tool of nuclear arms verification.

World-Class Fossil Sites
Lagerstätten: special places around the world that have spectacular fossils.

The Geoheritage Movement
Efforts around the world to preserve geological features of scientific, cultural and aesthetic value.

Rock Collecting Info
A few top-level sites for a very large subject.

Geological Guided Tours and Safaris
Unlike the usual trips to the usual places with thinly informed commentary, these safaris visit memorable geologic destinations, often with professional, credentialed guides.

Sediment and Soil
Links related to sediments, sedimentology, and soil science

Famous Earth Scientists A–C

Famous Earth Scientists D–H

Famous Earth Scientists I–M

Famous Earth Scientists N–R

Famous Earth Scientists S–Z

Basics of Geology
Basic resources about the shape of the land, erosion, the Earth's crust, and plate tectonics.

Basics of Rocks and Minerals
Basic resources about rocks, minerals, the elements, and geochemistry.

Basics of Geologic Time
Basic resources about geologic time and the ways we keep track of it.

Basics of the Deep Earth
Basic resources about the mantle and core of the Earth, and the methods we use to study them.

Basics of the Atmosphere and Space
Basic resources about climate, the upper atmosphere, and space, and how geology applies to them.

Basics of Geologic Hazards
Basic resources about earthquakes, volcanoes, tsunamis, landslides, cosmic impacts, and more.

Basics of Life on Earth
Basic resources about fossils, extinct life, evolution and more.

Photographic Tours
A set of field trips illustrated with photos from your About Geology Guide.

Geologic Maps Outside the United States
Geologic maps of countries other than the United States.

Geology Glossaries
Lots of different word lists for many specialized subjects.

Edmond Halley
Online biographies of the father of geophysics.

Lakes
The geological side of lakes: limnology and limnogeology.

Venus Geology
The best sites for seeing and learning about the geology of Venus.