paratectonicadj.
/ˌparətɛkˈtɒnɪk/, U.S. /ˈˌpɛrətɛkˈtɑnɪk/ Geology.
1. Produced by or denoting recrystallization accompanying large-scale deformation.
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1938 E. F. Knopf & E. Ingerson Struct. Petrol. viii. 110 Such a structure is a typical paratectonic crystallization under conditions of differential displacement.
1938 Mem. Geol. Soc. Amer. No. 6. 108 The crystallization in such fabrics can be termed: pretectonic, posttectonic, or paratectonic with reference to the particular mineral that is under consideration.
1978 Tectonophysics 51 83 (title) Reversal of the spiral direction of inclusion-trails in paratectonic porphyroblasts.
2001 Acta Petrologica Sinica 17 648 These quartz veins, having undergone the same low-temperature and high-pressure metamorphism as minerals of country rock, are a kind of paratectonic recrystallization veins.
2. Relating to or formed by a kind of deformation, associated with a parageosyncline, which is chiefly epeirogenic and produces relatively simple, broad folds (such as those in Germany north of the Alps). Cf. orthotectonic adj. 1. Now rare.
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the world > the earth > structure of the earth > formation of features > tectonization or diastrophism > [adjective] > tectogenesis
tectogenic1937
orthotectonic1956
paratectonic1956
tectogenetic1975
1956 L. U. de Sitter Struct. Geol. i. 15 Paratectonic Regions contain curved folds, predominantly of concentric type without thickening of the strata in the hinges, accompanied by faulting which is secondary to the folding.
3. Denoting or relating to an orogenic belt developed from wedges of sedimentary material during the later stages of contraction of an ocean basin under the forces of plate tectonics. Cf. orthotectonic adj. 2.
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1969 J. F. Dewey in Earth & Planetary Sci. Lett. 6 191/2 It is suggested that orogens are of two types, orthotectonic and paratectonic. Orthotectonic orogens develop early in the Pacific Phase from a continental rise built during the Atlantic Phase, and paratectonic orogens during the final stages of the Mediterranean Phase.
1969 J. F. Dewey in Earth & Planetary Sci. Lett. 6 195/1 An advanced stage in the development of a paratectonic orogen is provided by the Himalayas where the Indian Shield has been driven against and underthrust the Tibetan Plateau.
1969 Mem. Amer. Assoc. Petroleum Geologists 12 xxiv. 309/1 South of the fundamental Highland Boundary fault zone, inliers of the paratectonic Caledonides consist of Cambrian through Lower Devonian strata typified by simpler upright fold styles and a low degree of metamorphism.
1973 Nature 5 Oct. 244/2 Thickening of crust in paratectonic orogeny when two continental plates collide.
2002 Lithos 62 65 Deformation and metamorphism in the paratectonic zone occurred in Late Silurian-Early Devonian times.
This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).
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adj.1938