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
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
General Reference
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
Horizontal Drilling
- Challenge of Completing and Stimulating Horizontal Wells
- Horizontail Well Completion
- Horizontal Quick Summary
- Review of Horizontal Well Technology
Interpretation
Paleogeography
- Geological Evolution of the Earth
- Paleogeographic Atlas Progect, (U of C)
- Paleogeography Through Geologic Time
Periodic Table
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)