Keyword: ejecta

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  • EARTH-DIRECTED ERUPTION?.....

    02/04/2010 10:36:35 PM PST · by TaraP · 58 replies · 1,374+ views
    Spaceweather ^ | Feb 4th, 2010
    NASA's STEREO-B spacecraft is tracking four active regions strung across the eastern hemisphere of the sun. Click on the image below to set the scene in motion--and keep an eye on number 4. The movie shows an eruption of unstable magnetic loops. The blast occured around 0130 UT on February 5th and it appears to have hurled some material in the general direction of Earth. Images from the Solar and Heliospheric Observatory (SOHO) are not yet available to evaluate that possibility. Stay tuned for updates in a few hours.
  • Geology Picture of the Week, January 2-8, 2005: Evidence of Ancient Cretaceous Catastrophe

    01/06/2005 11:40:15 AM PST · by cogitator · 5 replies · 1,979+ views
    Rochestery Academy of Science | January 1998 | Paul Dudley
    Link post: the image and the thread (to discuss it) are below: Geology Picture of the Week, January 2-8, 2005: Evidence of Ancient Cretaceous Catastrophe
  • Geology Picture of the Week, January 2-8, 2005: Evidence of Ancient Cretaceous Catastrophe

    01/06/2005 11:32:02 AM PST · by cogitator · 6 replies · 1,587+ views
    Rochester Academy of Science ^ | January 1998 | Paul Dudley
    Considering that news is still dominated by the tsunami and its aftereffects (and aid and recovery efforts), my mind is still on that kind of topic. I recalled back during the days when the Chicxulub impact site was being identified as the main Cretaceous/Tertiary (K/T) event that the supporting evidence for the regional location was thick layers of ejecta at the K/T boundary found around the Caribbean. I checked for pictures and found a few; below is one of the best from Belize. Can you see the K/T boundary? Go to the linked article to read more about this image...