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.5621332.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/5621332 Punctuated activity on the fan of Gully A during December 2010. Vantage point shown in Figure 4b (Site 2). 2017-11-21 16:22:32 Gully formation McMurdo Dry Valleys deposition processes Punctuated activity sequence source importance Figure 4 b Site gully erosion December 2010. Vantage point Geology