Gully formation in the McMurdo Dry Valleys, Antarctica: multiple sources of water, temporal sequence and relative importance in gully erosion and deposition processes James L. Dickson James W. Head Joseph S. Levy Gareth A. Morgan David R. Marchant 10.6084/m9.figshare.5621341.v1 https://geolsoc.figshare.com/articles/media/Gully_formation_in_the_McMurdo_Dry_Valleys_Antarctica_multiple_sources_of_water_temporal_sequence_and_relative_importance_in_gully_erosion_and_deposition_processes/5621341 Time-lapse sequence of expansion of the hyporheic zone on the fan of Gully A (from November 2006) 2017-11-21 16:22:45 Gully formation McMurdo Dry Valleys hyporheic zone source importance deposition processes Time-lapse sequence gully erosion Geology