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borehole |
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borehole [ˈbɔːˌhəʊl] n
a hole driven into the ground to obtain geological information, release water, etc Translations How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Phase two of the deep drilling program involves deepening three boreholes drilled during phase one in April 2006 and extending them into the known mineralized zone at the 701-m to 762-m level. The scientists now report that at a depth of 766 m, a borehole pierced a beach ball-size rock that boars the chemical signature of an extraterrestrial object. This summer, scientists began using the borehole to pull up samples of rock from within the fault (see diagram, left). |
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