All glacier grounding points below 300 meters have been susceptible to basal melting from upwelled CDW for millennia, and a pattern has emerged that glaciers with deeper grounding points incur greater basal melting. (landscapesandcycles.net)
Eucalyptus trees, which can grow lengthy taproots to reach deep ground water in arid areas, may stretch down 40 meters. (sciencemag.org)