geomorphology, studies in particular the Lithosphere, and interactions with the Atmosphere and Hydrosphere, to understand the interconnection of various system processes. Geomorphologists are particularly interested in the potential for feedbacks between Climate and Tectonics mediated by Geomorphic Processes.Geochronology, uses dating methods to measure the rate of changes.Terrain measurement techniques, include differential GPS, remotely sensed digital models and laser scanning, to quantify, study, and to generate illustrations and maps.