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17. Application of airborne gamma-ray spectrometry in soil/regolith mapping and applied geomorphology Introduction Gamma-ray spectrometry The source of gamma-rays - bedrock vs regolith Attenuation of gamma-rays by water and vegetation Application of gamma-ray surveys to geological and regolith mapping Data acquisition and processing Data resolution and display Noise removal Image enhancement and integration Study areas Ebagoola Wagga Wagga Sir Samuael Results - case studies Gamma-ray responses of in situ soils/regolith Regolith associated with metamorphic rocks Regolith associated with granitic rocks Regolith associated with sedimentary rocks Ferriginous and silliceous duricrusts Gamma-ray response of transported soil/regolith Alluvial material Colluvial material Aeolian material Groundwater recharge and discharge Soil/regolith catenas Weathering development and relative geomorphic activity Bedrock-dominated landforms Depositional landforms Discussion Conclusions References
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