Auxiliary Materials for Paper 2011GL046870 Release of multiple bubbles from cohesive sediments Christopher K. Algar Ecosystem Center, Marine Biological Laboratory, Woods Hole, Massachusetts, USA Bernard P. Boudreau and Mark A. Barry Department of Oceanography, Dalhousie University, Halifax, Nova Scotia, Canada Algar, C. K., B. P. Boudreau, and M. A. Barry (2011), Release of multiple bubbles from cohesive sediments, Geophys. Res. Lett., 38, LXXXXX, doi:10.1029/2011GL046870. Introduction Auxiliary material contains animations, one figure and one table. 1. 2011gl046870-fs01.tif Schematic cross-section of an oblate spheroid that illustrates the major, 2a, and minor, 2b, axial lengths. 2. 2011gl046870-ts01.pdf Parameter values used in LEFM-RD growth simulations, chosen to correspond to conditions at Cape Lookout Bight, NC. 3. 2011gl046870-ms01.avi A bubble is grown by gas injection from a needle in gelatin. Notice the oblate shape and that growth is primarily at the upper edge. This preferred direction of growth is observed with most bubbles, even with longer injector needles. The bubble is approximately 5 cm along its major axis at the end of its growth. 4. 2011gl046870-ms02.avi Bubbles injected in sequence from a needle into gelatin. The initial bubble (not shown) created a rise path with a constriction about half way up the gelatin column. The pinch creates a point with a higher toughness to open; thus it takes the pseudo-buoyancy of two bubbles to open the path at that point. (Bubbles are about 4 cm in their major axis.) See Takada [1990, J. Geophy. Res., 95 (B6), 8471–8481] and Boudreau et al. [2005, Geology, 33(5), 517-520] for other examples of such bubbles.