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    Send an email to Annalee Newitz, the author of this post, at annalee@io9.com.

    By Annalee Newitz
    Jul 10, 2009 8:30 AM 24,826
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    The Best Collection of Engineering Disaster Photos You've Ever Seen

    This is a massive sinkhole that was created when a gypsum stack collapsed in Florida. Gypsum stacks are byproducts of phosphate mining processes. Say the researchers:
    This massive sinkhole formed on top of a gypsum stack in Florida, and contributed to contamination of the aquifer below. Grouting work by Hayward Baker to seal the aquifer from the gypsum stack was recognized with a national award.
    link directly to this page:
    http://io9.com/5311550//gallery/gallery/5
    read more: #geophysicalporn, #geophysics, #science, #rossboulanger, #jamesmichaelduncan, #engineering, #civilengineering