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Geotimes
February 2004
Sara Pratt |
Fire cooks rock clocks A new field study has confirmed what models had previously predicted: The intense heat of wildfires can reset the helium "clock" in rocks, making them appear younger than they are.   |
Geotimes
November 2003
Sara Pratt |
Tracing the Navajo sandstone The thick Navajo sandstone in Zion National Park is one of the largest wind-deposited formations in the geologic record. Geologists have devised a new way to determine the origin of such sedimentary rocks. |
Geotimes
March 2007 |
Geophenomena Appalachian Mountains Becoming More Rugged... Smoke on the Water... |
Geotimes
November 2005
Megan Sever |
New Appalachian Tale New research indicates that conventional thinking about the timing of the building of the Appalachian Mountains may be incorrect. |
Geotimes
October 2004
Jay Chapman |
Melting Glaciers Promote Earthquakes In southern Alaska, melting glaciers heat up the possibility of earthquakes. |
Smithsonian
October 2006
Anne Bolen |
Life in the Field - Frozen in Time Glaciers in the Pacific Northwest have recorded hundreds of years of climate history, helping researchers plot how quickly the planet is warming. |
Geotimes
September 2004
Sarah Todd Davidson |
The Center of it All: Visiting Central Park New York's Central Park presents a treasure trove of important geologic information. |
Geotimes
October 2003
Sara Pratt |
Ancient glaciers near L.A. The small alpine glaciers that once existed 120 kilometers east of Los Angeles, Calif., were, according to a new study, present as recently as 5,000 years ago, a time when regions to the north had already become ice-free. |
Geotimes
March 2005
Sara Pratt |
Rocky Debate Over Early Life Scientists fail to replicate a 1996 study on 3.85-billion-year-old rocks that pushed back the date of the earliest evidence for life on Earth by several hundred million years. |
Chemistry World
July 21, 2010
James Urquhart |
Volatile elements locked in moon rock Samples of a mineral present on the Moon and on Earth have been found to contain almost the same concentrations of hydrogen, chlorine and sulfur, adding weight to questions over how the Moon formed and evolved. |
Smithsonian
August 2005
Laura Helmuth |
Phenomena and Curiosities: Baked Alaska A unique study documents the disappearance of Alaska's glaciers, blamed on global warming. |
Science News
March 27, 2004 |
Earth Image Presented by the Universities Space Research Association, this Web site features a new photo, graphic, or illustration every day. Each one deals with an aspect of earth science. |
