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High-resolution ground penetrating radar imaging (225- to 900-MHz) of geomorphic and geologic settings: examples from Utah, Washington, and Wisconsin

Over the past 10 years, ground penetrating radar (GPR) studies in a wide variety of geomorphic and geologic settings have, surprisingly, revealed detailed stratigraphic information. Most of these studies were conducted with lower frequency antennae (50 - 100 MHz) in an effort to better understand subsurface stratigraphy. As GPR systems and data collection methods continue to improve in their ability to collect higher quality digital data, GPR investigations are poised to enter a new era of higher resolution exploration utilizing higher frequency antennae. The paper presents the results of four case studies using a higher frequency (225 - 900 MHz) GPR system to effectively investigate coastal and eolian sedimentary environments. Some drawbacks of higher frequency data are: the lack of penetration depth, in some cases too much detail ('lose the forest for the trees'), and potentially extra equipment in the field.