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Geography fun facts and oddities: Difference between revisions
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* sinkholes may also be caused by a drainage of water, such as a water table decline | * sinkholes may also be caused by a drainage of water, such as a water table decline | ||
* sinkholes are most common where limestone, sandstone, salt beds, or gypsum are prevalent | * sinkholes are most common where limestone, sandstone, salt beds, or gypsum are prevalent | ||
[[File:Thor's Well (37588682016).jpg|350px|border|right|thumb|Thor's Well: a sinkhole on the coast of Cape Perpetua, Oregon]] | [[File:Thor's Well (37588682016).jpg|350px|border|right|250px|thumb|Thor's Well: a sinkhole on the coast of Cape Perpetua, Oregon]] | ||
* Thor's Well: a sinkhole on the coast of Cape Perpetua, Oregon, that drains at high tides | * Thor's Well: a sinkhole on the coast of Cape Perpetua, Oregon, that drains at high tides | ||
[[File:December_Giant_sinkhole_collapse_USGS_1972.jpg|350px|border||right|thumb|More than three acres of forest suddenly disappeared into this "December Giant" sinkhole in Montevallo, Alabama, USA.]] | [[File:December_Giant_sinkhole_collapse_USGS_1972.jpg|350px|border||right|thumb|More than three acres of forest suddenly disappeared into this "December Giant" sinkhole in Montevallo, Alabama, USA.]] | ||