This website, hosted by the United States Geological Survey (USGS), provides a brief description of basalt and basaltic lavaflow and lists many of the chemical and physical properties of this type of rock. An example image is included, as well as interesting facts about the rock, and links providing related information.
<a href="http://www.physicstogo.org/items/detail.cfm?ID=7984">United States Geologic Survey. Volcano Hazards Program Photo Glossary: Basalt. Sioux Falls: United States Geologic Survey, November 6, 2006.</a>
United States Geologic Survey. Volcano Hazards Program Photo Glossary: Basalt. Sioux Falls: United States Geologic Survey, November 6, 2006. http://volcanoes.usgs.gov/images/pglossary/basalt.php (accessed 30 July 2015).
%0 Electronic Source %D November 6, 2006 %T Volcano Hazards Program Photo Glossary: Basalt %I United States Geologic Survey %V 2015 %N 30 July 2015 %8 November 6, 2006 %9 image/jpeg %U http://volcanoes.usgs.gov/images/pglossary/basalt.php
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