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.5621338.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/5621338 Close-up of punctuated activity in Gully A during December 2010, showing <i>c</i>. 10 cm of fan emplacement and several metres of lateral erosion of pre-existing fan material. Vantage point shown in Figure 4c (Site 3). 2017-11-21 16:22:40 10 cm Gully formation McMurdo Dry Valleys sequence fan material source fan emplacement importance Figure 4 c vantage point metre Site deposition processes Close-up gully erosion Geology