| |
| |
Haughton Crater | NASA Haughton-Mars Project |
 | | The Haughton meteorite impact crater, on Devon Island, Nunavut, in the Canadian high arctic, is 20 km in diameter and formed 23 million years ago. |
 | | However, particularly distinctive at Haughton is the crater's allochthonous impact breccia formation, a rubble deposit resulting from the launching, airborne mixing, fallback and weak rewelding of impact-shattered fragments derived from the entire stack of excavated rocks. |
 | | Mason eventually revisits Haughton and finds shatter cones (fractured rocks presenting cone-shaped patterns of fracture diagnostic of impact shock), and with F. Blyth Robertson of the Geological Survey of Canada, formally confirms the nature of Haughton as an impact structure. |
| www.marsonearth.org /about/crater.html (701 words) |
|