A multi-isotope approach to determine the origin of methane and higher alkanes in groundwater of the St. Lawrence Platform, Saint-Édouard area, eastern Canada
Preglacial paleotopography at the eastern terminus of the Plum River Fault Zone, Ogle County, Illinois
London Arch, Port Campbell National Park, Australia. Formerly named London Bridge, London Arch is an offshore natural arch formation eroded from limestone cliffs along the Great Ocean Road. It was a complete double-span natural bridge until 1990, when the arch span closest to the shoreline collapsed, leaving the single London Arch. Photo by Beverly Molyneux.
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