Developed, thematic sites, most with text and images that might be useful sources of information for finding out about a subject or writing a paper.

• The Aurora Page
  Aurora Borealis - The Northern Lights are examined in this well-designed site with explanations, images, forecasting data, and good links to other sites.
  
• Dinosaur Eggs
  This site takes you behind the scenes of NATIONAL GEOGRAPHIC magazine May 1996 article, "The Great Dinosaur Egg Hunt."
  
• Dinosaur Provincial Park
  This site in Alberta, Canada contains extensive information on dinosaurs based on the significant fossil beds in the park.
  
• The Dinosauria:Truth is Stranger than Fiction.
  Well hyper-texted article based on the Hall of Dinosaurs at The Museum of Paleontology of The University of California at Berkeley. Includes well-developed areas such as a guided tour of Dilophosaurus narrated by the discoverer of Dilophosaurus, Sam Welles.
  
• Burgess Shale Fossils
  The Burgess Shale is an exceptional Middle Cambrian age fossil location in British Columbia,Canada. Site includes description, photographs and references.
  
• Earthquake Hazards in Oregon and Washington
  A well-developed site with information on earthquakes and earthquake hazards in the Pacific Northwest including a reading and resource list.
  
• El Niño Theme Page
  Most recent observational data and El Niño forecasts, as well as relevent scientific analyses and historical perspectives animations and frequently asked questions.
  
• Mount St. Helens
  Site contains extensive information on Mount St. Helens before, during and after the 1980 eruption.
  
• MTI Volcanoes Page
  Michigan Technological University site includes animations from Mt Etna, pictures, reports from Smithsonian Institution's Global Volcanism Network, information on remote sensing of volcanic activity
  
• USGS Bedform sedimentology page
  The bedform and crossbedding images in this website are companions to the book: Cross-Bedding, Bedforms, and Paleocurrents, by D.M. Rubin (Columbia GEOLOGY QE472 .R82 1987g)
  
• VolcanoWorld
  Regularly updated information on recent volcanic eruptions, pictures of many volcanoes, an extended discussion of Galapagos and Guatemala volcanic action.
  
• Web Time Machine
  A geologic web lift to stratigraphy, fossils and fossil locations throughout geologic time.

Locational guides to the internet for special subjects ranging from well developed guides to internet and printed resources on a topic to unsorted lists of internet sites.

• The Electronic Volcano
  An exceptionally well organized site for finding electronic and paper resources on active volcanoes.
  
• Radiocarbon Information Sources
  Annotated guide to internet resources related to radiocarbon including list of laboratories, computer programs, indexes and web servers specializing in C-14.
  

Some of the sites in this group are similar to printed reference books containing organized data on a subject, sometimes with sophisticated search and display options. Others are "no frills" sites with little information about the data or how to use it.

• The IRI/LDEO Climate Data Library
  The Data Catalog has been developed by the Climate Group at Lamont-Doherty Earth Observatory. It is both a catalog and a library of datasets, i.e. it both helps you figure out which data you want, and helps you work with the data. The interface llows you to make plots, tables,and files from any dataset.
  
• Geographic Names Information Service (US)
  Searchable geographic name database that provides type of feature (town, river, park, etc.), county, longitude and latitude, USGS topographic map sheet that shows feature and a general Tiger map showing location of feature within the US.
  
• Global Change Master Directory (NASA)
  A comprehensive directory of descriptions of data sets of elevance to global change research. This database includes descriptions of data sets covering climate change, agriculture, the atmosphere, biosphere, hydrosphere & oceans, geology, geography, and human dimensions of global change.
  
• National Geophysical Data Center
  
• Tide Predictor
  WWW Tide Predictor presents worldwide (strongest coverage for US & Canada) tide predictions in tabular or graphical format adjusted for daylight savings time or UTC starting from the current or a specified date up to one week ahead. Start days for the years 1995-2025.