Science Features » karst http://www.usgs.gov/blogs/features Highlighted USGS science Fri, 24 May 2013 22:24:21 +0000 en-US hourly 1 http://wordpress.org/?v=3.4.2 Earth History of the National Capital Region http://www.usgs.gov/blogs/features/usgs_top_story/earth-history-of-the-national-capital-region/ http://www.usgs.gov/blogs/features/usgs_top_story/earth-history-of-the-national-capital-region/#comments Mon, 18 Apr 2011 19:21:43 +0000 ocweb http://www.usgs.gov/blogs/features/?p=128844 Collage showing USGS headquarters facility, Great Falls National Park, map of Washington D.C. and local topography.

Collage showing USGS headquarters facility, Great Falls National Park, map of Washington D.C. and local topography.

For over 120 years, USGS has studied and mapped the National Capital region revealing a rich and diverse geologic past. Join us July 6 in Reston, Va., and learn the story of the formation and destruction of continents and oceans, the eruption of ancient volcanoes, climatic and sea level changes, as well as the hazards of modern landslides, earthquakes and karst.

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]]> http://www.usgs.gov/blogs/features/usgs_top_story/earth-history-of-the-national-capital-region/feed/ 0 public_lecture_july Collage showing USGS headquarters facility, Great Falls National Park, map of Washington D.C. and local topography. Caves, Sinkholes and Springs http://www.usgs.gov/blogs/features/usgs_top_story/caves-sinkholes-and-springs/ http://www.usgs.gov/blogs/features/usgs_top_story/caves-sinkholes-and-springs/#comments Tue, 15 Mar 2011 15:00:33 +0000 ocweb http://www.usgs.gov/blogs/features/?p=92744 Collage of soluble rock layers of Karst.

Soluble rock layers called “Karst” exist throughout the nation. While Karst aquifers produce half the nation’s drinking water, rock layers underneath karst dissolve easily sometimes creating sinkholes that threaten life and property. Join us May 4th to learn more about this unseen world beneath our feet.

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]]> http://www.usgs.gov/blogs/features/usgs_top_story/caves-sinkholes-and-springs/feed/ 0 karst_collage Collage of soluble rock layers of Karst.