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Ground penetrating radar (GPR) was used to investigate the internal structure and development of an active parabolic sand dune in the Bigstick Sand Hills of southwestern Saskatchewan, Canada. The radar survey was conducted in a grid configuration using 250 MHz antennas. The radar frequency and the properties of the aeolian sands limited the penetration of the radar signal to the uppermost 4 m. Radar profiles parallel to the prevailing westerly wind reveal three zones with differing structural arrangements that are interpreted to represent three phases in the development of the dune: (1) underlying low-angle reflections representing preexisting aeolian strata associated...

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