Codes & Symbols

• Geologic Map Patterns
  
• Geologic Symbols (USGS)
  
• Lexicon of Geologic Names (USGS)
  
• Lithologic Symbols (USGS)
  
• Magnetic Declination (USGS)
  
• Magnetic Declination: Compute (NOAA)
  
• Reference Code Abbreviations (IHS)
  
• Stratigraphic Section Construction (U of M)
  
• Stratigraphic Symbols (USGS)
  
• Topographic Map Symbols
  
• Well Status Codes
  
• Well Symbols
  

Conversions & Prices

• Commodity Prices and World Markets
  
• Commodity & Quotes (StockHouse)
  
• Conversions
  
• Currency Converter
  
• Lat/Long Converter Free Software (Corpscon)
  
• Lat/Long Converter to UTM
  
• Map Scales (USGS)
  
• State Plane Coordinates
  
• Uranium Price
  

Definitions & Glossaries

• Earthquake Glossary (USGS)
  
• Geologic Dictionary (Geotech.org)
  
• Geologic Dictionary (Webref.org)
  
• Glossary of Glacial Geology
  
• Glossary of Selected Coal Classification Terms
  
• Oil and Gas Glossary (USDL)
  
• Oil Field Glossary
  
• Petrographic Atlas of Coals, Cokes, Chars, Carbons, Graphites
  

Environmental References

• Air Quality Resource Guide
  
• Green Resources Energy Efficiency Tips
  

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General Interest Subjects

• Alaska Volcanic Observatory
  
• Color Wheel
  
• Earthquakes: California-Nevada (USGS)
  
• Earthquakes: Worldwide (USGS)
  
• Mining Company Worldwide Lists
  
• National Hurricane Center
  
• NOAA Weather
  
• Routes of Principal U.S. Explorers (USGS BULL 1212)
  
• Southern California Earthquake Data Center (SCEDC)
  
• Universal Transverse Mercator (UTM) Grid
  
• UTM Grid Zones of the World
  
• Volcanos (Smithsonian Institution)
  

General Reference

• Dam Design
  
• Definitive Guide To English Grammer
  
• English Grammer
  
• Fault Motion
  
• Grammer Education Guide
  
• Landslides (USGS)
  
• List of Bugs Bunny cartoons (Wikipedia)
  
• Mathmatics
  
• Minerals
  
• Physics
  
• Principle Meridians, U.S.
  
• Structural Geology Techniques
  

Geologic Time Scale

• Geologic Time Scale GSA 2009 (PDF)
  
• Geologic Time (USGS)
  
• Geologic Time (Kaye & Laby)
  
• Geologic Time (Wikipedia)
  
• Geologic Time (Wikipedia)
  
• List of official and unofficial names for time spans

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Horizontal Drilling

• Challenge of Completing and Stimulating Horizontal Wells
  
• Horizontail Well Completion
  
• Horizontal Quick Summary
  
• Review of Horizontal Well Technology
  

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Interpretation

• Crain's Petrophsical Handbook
  
• Geophysical Well Log Interpretation
  
• Logging Cuttings

Paleogeography

• Geological Evolution of the Earth
  
• Paleogeographic Atlas Progect, (U of C)
  
• Paleogeography Through Geologic Time

Periodic Table

• Periodic Table Of Elements
  
• Periodic Table Of Elements Alphabetical

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Rock & Soil Classifications

• Cave Geology
  
• Glaciers and Glacial Geology
  
• Landslides
  
• Rock Classifications, Igneous
  
• Rock Classifications, Metamorphic
  
• Rock Classifications, Sedimentary
  
• Sand Dune Geology
  
• Soil Classifications
  
• Unified Soil Classification System
  
• Unified Soil Classification System (Wikipedia)
  

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Rock & Soil Classifications

• PEH:Immiscible Gas Injection in Oil Reservoirs