Recumbent fold

There are a few main structural tends that the underground dykes follow (a) emplacement of phases 3, 4, and 5 predominantly sub-parallel to folded bedding planes near the apical Mine Stock (phase 2), or upper portions of the mine (b) 115°-295° emplacement of phases 4 and 5 sub-parallel to bedding in the lower recumbent fold limb (Fig. 2), or lower portions of the mine and (c) 040°-220° emplacement of phase 6 sub-parallel to the 5 mine-scale normal faults (Fig. 2), throughout the mine near the Mine Stock margins. Phase 6 dykes also offset other dykes and bedding in a normal sense. 

Takasu, a. Makino, K. 1980. Stratigraphy and geologic structure of the Sambagawa metamorphic belt in the Bessi district, Shikoku, Japan-reexamination of the recumbent fold structures. Chikyu Kagaku, (Earth Science), 34, 16-26. 

The four phases are Di thrust-related tight to isoclinal (Fi) folds and associated axial planar schistosity (Si). D2 tight-to-isoclinal folds (F2), with S2, are interpreted as high strain deformation with F1/F2 fold interference structure (Fig. 6) resulting in the development of SI/S2 composite fabric elements. D3 are recumbent and best developed in the west part of the BMC, and D4 are represented as kink-folds. 

Roland et al. 1989 Stump 1989). Most recently, the composition and occurrence of the Rennick Schist was summarized by Stump (1995) who included a picture of a large recumbent fold of Rennick Schist on Welcome Mountain (72°14 S, 160 12 E). He also pointed out that the southernmost exposures of the Rennick Schist are only about 50 km north of the northernmost outcrops of the Priestley Formation. 

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