| 释义 |
eugeosynclinal, a. Geol.|ˌjuːdʒiːəʊsɪŋˈklaɪnəl|
[ad. G. eugeosynklinal (H. Stille Einführung in den Bau Amerikas (1941) i. 15): cf. eu-, geosynclinal a.]
Of or pertaining to a eugeosyncline.
1942Bull. Geol. Soc. Amer. LIII. 1644 The great thrusting in the Virginian–Pushmataha belt may be limited to the area in which it lies on eugeosynclinal facies. 1969Bennison & Wright Geol. Hist. Brit. Isles iv. 72 The Welsh Caledonian or Lower Palaeozoic Geosyncline..has something in common with the theoretical eugeosynclinal concept. 1977A. Hallam Planet Earth 196/1 The scale and intensity of deformation may have been such as to force slices of the eugeosynclinal facies along shallow-dipping thrust planes into the miogeosynclinal or even the kratonic regions. 1984D. L. Dineley Aspects Stratigr. Syst.: Devonian ix. 163/1 Eugeosynclinal rocks of Devonian age are widespread and include thick black shales, limestone lenses, thick cherts and greywackes, some conglomeratic spreads and enormously thick andesitic and basaltic volcanics.
Also eugeoˈsyncline n., a geosyncline in which material of volcanic origin predominates.
1942Bull. Geol. Soc. Amer. LIII. 1642 In contrast to the Magog eugeosyncline, the Champlain belt contains dominant carbonates of shallow-water origin, unaffected by subsequent volcanism. 1969Bennison & Wright Geol. Hist. Brit. Isles iv. 71 The standard type of geosyncline, or Eugeosyncline, typically includes sediments which are chiefly dark shales and greywackes. 1980Nature 29 May 289/1 The western, volcanosedimentary ‘eugeosyncline’ of the North American Cordillera is a collage of terrains of varied origins that apparently became attached to the western continental margin of the continent at different times. |