Wilford et al 1997 Gamma applied soil mapping geomorpho

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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