Transected folds from the western part of the Bala lineament, Wales

Autor:	W.R. Fitches, W.T. Pratt
Rok vydání:	1993
Předmět:	Paleozoic Lineament musculoskeletal neural and ocular physiology Mineralogy Geology Fold (geology) Transpression Devonian Paleontology surgical procedures operative nervous system Welsh Basin Close relationship natural sciences Clockwise geographic locations
Zdroj:	Journal of Structural Geology. 15:55-68
ISSN:	0191-8141
DOI:	10.1016/0191-8141(93)90078-o
Popis:	Fold-cleavage relationships are described in the Cadair Idris area of the Lower Palaeozoic Welsh Basin, which includes the western part of the Bala Lineament. Many fold hinges are transected by the broadly contemporaneous Caledonian (Lower Devonian) cleavage. Transection angles are amongst the highest yet described from the Welsh Basin. There is a close relationship between fold strike and sense and amount of transection; N-S folds are clockwise transected, NE folds have an axial planar cleavage whilst ENE folds are anticlockwise transected. Similar relationships occur throughout the central Welsh Basin. A model of progressive deformation is described whereby weak regional transpression is modified by local factors. Viscosity contrasts are recognized as one of the most important controls on the timing of fold development and the amount of transection.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::29e6d9e45c15183fbcd6782c19a439c3 https://doi.org/10.1016/0191-8141(93)90078-o Zobrazit plný text záznamu