Strain distribution in a fold in the West Norwegian Caledonides

Holst, Timothy B.; Fossen, Haakon

doi:10.1016/0191-8141(87)90001-0

Cited by 38 publications

(9 citation statements)

References 22 publications

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“…The state of finite strain has proved to be a significant tool in the interpretation of folds and folding processes in rocks (Ramsay, 1967;Fletcher, 1974;Groshong, 1975;Pfiffner, 1980;Spang et al, 1980;Hudleston and Holst, 1984;Holst and Fossen, 1987). Further, the variation of strain in rocks may be studied through the measurements of strained objects, or from geometric studies of structures such as folds and rock fabric studies.…”

Section: Introductionmentioning

confidence: 98%

RETRACTED: Finite strain and deformation from a refolded region of the Dudatoli-Almora Crystalline, Kumaun Lesser Himalaya

Srivastava

2004

Journal of Asian Earth Sciences

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Section: Introductionmentioning

confidence: 98%

RETRACTED: Finite strain and deformation from a refolded region of the Dudatoli-Almora Crystalline, Kumaun Lesser Himalaya

Srivastava

2004

Journal of Asian Earth Sciences

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“…On the other hand, the relatively short distance (<2 km) between the extraction (source rocks) and erection (stele) sites illustrates the strategies of ancient people to minimize energy for the transportation of heavy material. About the structural and kinematic patterns of the Nizon orthogneissic substratum, emphasis is put here on its prominent linear fabric that expresses by spatially associated L and L>S tectonites, as commonly observed elsewhere (Holst & Fossen, ; Sullivan, ). The development of L fabrics in the high‐strained Nizon orthogneiss is kinematically associated with sinistral ductile shearing, long known to have occurred at a wider scale over most of the SAD eo‐Variscan orogenic belt (Jegouzo, Peucat, & Audren, ).…”

Section: Discussion–conclusionmentioning

confidence: 99%

Iron Age stelae in the Flinn strain diagram

Gall

Caroff

2018

Terra Nova

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A recurrent, but often difficult issue when studying lithic monuments from the past is to determine both the origin and location of the corresponding source rocks.Addressing these questions necessarily requires an integrated archeological/geological approach that can be successfully applied when the megaliths under study display diagnostic physical attributes. This is the case for four Iron Age cigar-shaped stelae from SW Brittany (France) that typically show L>S and L tectonite fabrics similar to those of the Ordovician Nizon orthogneiss. Our integrated approach provides a better understanding of the criteria used by Iron Age people in selecting rock material, and the four Iron Age monoliths under study can be viewed in some ways as a pioneer application of the Flinn strain ellipsoid concept. Our work also emphasizes the prominent development of L tectonites in the eo-Variscan basement in SW Brittany, synchronous with sinistral ductile shearing and orogen-parallel elongation.

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“…The steady state strain in the case of radial flow approximates to that of simple shear, with superimposed stretching in the third dimension. Holst and Fossen (1987) measured strain from clasts within a deformed conglomerate layer around an asymmetric fold in the West Norwegian Caledonides. The fold geometry and their strain analysis, as well as other field observations, suggest that the fold developed in a shear zone, where strain was accommodated by simple shear accompanied by stretching in the third dimension, parallel to the hinge direction.…”

Section: Discussionmentioning

confidence: 99%

Inclusion‐trail geometry of albite porphyroblasts in a fold structure in the Sambagawa Belt, central Shikoku, Japan

Okamoto

1998

Island Arc

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The orientation of straight inclusion trails within albite porphyroblasts from basic schists has been measured around a north‐closure fold, in the Besshi district of the Sambagawa Belt, central Shikoku, Japan. The porphyroblasts are aligned with their longest dimension parallel to both the subhorizontal, east–west‐directed mineral lineation and to the fold axis. There is a systematic variation in inclusion‐trail geometry between the upper (northern) and lower (southern) fold limbs. The shear sense deduced from quartz c‐axis fabrics is top‐to‐the‐west in the upper limb and top‐to‐the‐east in the lower limb. Based on observed variations in porphyroblast inclusion trails, the structural history can be modelled as follows: (i) shear flow caused east–west stretching and folding of the metamorphic zonation; (ii) east–west ductile shear resulted in opposing senses of shear in the upper and lower limbs as the eclogite body situated in the core of the fold was extruded to the east.

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Strain distribution in a fold in the West Norwegian Caledonides

Cited by 38 publications

References 22 publications

RETRACTED: Finite strain and deformation from a refolded region of the Dudatoli-Almora Crystalline, Kumaun Lesser Himalaya

RETRACTED: Finite strain and deformation from a refolded region of the Dudatoli-Almora Crystalline, Kumaun Lesser Himalaya

Iron Age stelae in the Flinn strain diagram

Inclusion‐trail geometry of albite porphyroblasts in a fold structure in the Sambagawa Belt, central Shikoku, Japan

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