Fluidization: sedimentary sills

Fluid overpressure in coarse-grained sediments causes formation of flame structures into finer-grained sediment, that deforms hydroplastically. After expulsion through the relatively strong sandstone, the conglomerate forms a sill in softer marls (Gosau Group, Muttekopf).

Fluid overpressure in coarse-grained sediments causes formation of flame structures into finer-grained sediment, that deforms hydroplastically. After expulsion through the relatively strong sandstone, the conglomerate forms a sill in softer marls (Gosau Group, Muttekopf).

 

Coarse grained sedimentary sill in fine-grained sediments. Intrusion of sill caused local contortion of fine-grained material (arrows) (Gosau Group. Muttekopf).

Coarse grained sedimentary sill in fine-grained sediments. Intrusion of sill caused local contortion of fine-grained material (arrows) (Gosau Group. Muttekopf).