Apr 5, 2023 The structure and evolution of sutures in allochthonous salt Model 1 – canopy formation: this model was not included in the paper but offers an overview on canopy formation, suture evolution and some the terminology introduced in this paper. No roof was added on top of the spreading salt sheets but sutures were marked by powder paints allowing their bowing and deformation to be revealed.
Apr 5, 2023 The structure and evolution of sutures in allochthonous salt Model 2 – encircling autosuture: this movie illustrates an advancing salt sheet, and its roof, encountering an obstacle at its periphery. The salt sheet splits into two lobes and rejoined on the downdip side of the obstacle, forming an encircling autosuture. See Figures 10 and 11 and accompanying text in the paper.
Apr 5, 2023 The structure and evolution of sutures in allochthonous salt Model 3 – basal suture line: this movie illustrates the formation of a sediment ridge defining a basal suture line of a long-lived encircling autosuture. Roof material was shed off the encircling lobes into the gap between them, building a pile of sediment that was overridden as the sheet advanced. The ridge is parallel to the advance direction of the salt sheet. For more details see Figures 12 and 13 and accompanying text in the paper.
Apr 5, 2023 The structure and evolution of sutures in allochthonous salt Model 4 – symmetric collision evolution: this move illustrates the advance and collision of two salt sheets forming an upright suture with trapped sediments shed off the approaching salt sheets. The two sheets were tilted toward one another by equal amounts so they collided without override. Fold belts formed on both sides of the apical suture line. For more details see Figure 14 and associated text in the paper. A seismic example is illustrated in Figure 15.
Apr 5, 2023 The structure and evolution of sutures in allochthonous salt Model 5 – head-on collision with override, discontinuous roof: this movie illustrates the advance, and collision of two salt sheets. The right salt sheet was tilted to a steeper angle and began to override the left hand salt sheet. The roof of the right-hand salt sheet was discontinuous and reveals the roof of the overridden sheet being torn apart by shear traction during override. This model was not shown in the paper but seismic examples of torn sutures are shown in Figure 16 and associated text.
Apr 5, 2023 The structure and evolution of sutures in allochthonous salt Model 6 – oblique collision and override: this movie shows the evolution of a suture model whereby the salt sheets collided obliquely and suture maturity and amount of override varied along strike. Note the development of fold belts in the roofs of both sheets. Fold belts are tighter where collision occurred earlier. Zones of extension form when the salt sheets surmounts the base-salt ramp. For more details see Figures 18 and 19 and associated text in the paper.
