WebPinch and swell structures, also called drawn or necked boudins, are a subset of boudins that retain continuity of the drawn layers (Fig. 1a and b). These pinch and swell structures … WebJul 1, 2016 · Pinch and swell structures occur where a more competent layer in a weaker matrix is subjected to layer-parallel extension. In this contribution, we use numerical models to explore the use of pinch and swell structure shape symmetry and asymmetry as a determinant of relative viscosity between layers.

Columnar jointing SpringerLink

http://www.columbia.edu/dlc/cup/ricci/ricci14pl60.html WebThe natural pinch and swell structures show both stage 2 development, with R W < 0.4 (Fig. 2c) and stage 3 development, with R W < 0.2 ( Fig. 2a and b). Rotation of the bedding … jessica rusu fca

(PDF) Structural geology Haakon Fossen

WebStructures in ore deposits • Faults, veins, channel ways • Very important in hydrothermal deposits • Influence the general shape of mineralization bodies; lodes, veins, stocks, pipes • Stratigraphic structures • Saddle reefs • Impounding bodies in Carlin-type gold deposits WebThe stratification style has been called wavy bedding by students of tidal sediments, 2 where it is commonly, though not exclusively, found. Bedding is also said to have a pinch-and-swell structure. We see also, in the picture, that thinner sandstone beds loose their individuality laterally by leaving place to an alignment of discontinuous lenses. WebA structure formed by a layer that has separated into pieces, typically as a result of extension. Boudinage (pinch-and-swell structure) The process of formation of boudins. Branch point. A point where one fault meets and joins another. Breccia. A rock composed of typically angular fragments, typically from a fault. lampa ir 100