5/5/2023 0 Comments A1 website download serial![]() ![]() This has long been recognized for salt diapirs (Trusheim, 1957 Schultz-Ela et al., 1993, salt glaciers (Wenkert, 1979 Talbot, 1979 Talbot and Aftabi, 2004 Závada et al., 2012), salt decoupling (Peel, 2014 Rowan and Krzywiec, 2014 Tȃma et al., 2021), and at a smaller scale for internal salt flow creating folding or boudinage (van Gent et al., 2011 Fiduk and Rowan, 2012 Strozyk et al., 2014 Dooley et al., 2015 Rowan et al., 2019 Adamuszek et al., 2021). Salt -unlike most sedimentary rocks -is very weak and deforms like a viscous fluid, even at low temperatures and shallow depths, and its presence in sedimentary basins fundamentally changes their evolution by salt tectonic processes (Jackson et al., 1994 Urai et al., 2008 Jackson and Hudec, 2017). ![]() (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.) (g) A1 pierced actively to the surface and came into contact with the overburden sediments. By this stage, one of the upturned flaps flanking the A1 feeder became strongly overturned to form a recumbent syncline. (f) The intrasalt diapir continued to rise and arched the top of salt. As A1 rose, it inflated the sheet of allochthonous salt and spread outwards over younger evaporites. This had previously been prevented by the strength of the brittle evaporite units. (e) After the entire evaporite sequence was breached, density-driven overturn began in earnest. (d) A1 finally breached A4 and began to spread within it. Parts of A2 breached A3, while portions of green A3 breached A4. (c) The lower breach intensified and brittle units of A2 were back tilted as A1 continued to inject. Brittle units at the top of A2 and base of A4 were boudinaged. (b) Brittle units of A2 were breached, allowing A1 to rise up and intrude ductile A2 layers. (a) As the diapir arched under the differential load, the more mobile evaporites (green A3 and dark-blue A4) flowed laterally and thickened the crest of the salt-cored anticline. Tops of A1 and A4 are indicated by dashed white line and dashed red line respectively. Pseudotemporal evolution of Model 3 using serial sections that illustrate the least-to-most mature structures along the length of the wall. ![]()
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