| 释义 |
periglacial, a. Geomorphol.|pɛrɪˈgleɪsɪəl, -ʃəl, -ʃɪəl|
[ad. G. periglazial (W. ᴌoziński 1909, in Bull. internat. de l'Acad. des Sci. de Cracovie: Classe des Sci. math. et nat. i. 16): see peri-1 and glacial a.]
Characteristic of or being a region where the influence of an adjacent ice sheet or glacier, or of frost action, is important in forming or modifying the landscape.
1928Amer. Jrnl. Sci. XVI. 163 The complete realization that continental glaciation implies that a zone of periglacial climate borders the ice should lead to interesting and fruitful studies of the zone immediately south of our extensive glacial boundary. 1936Proc. Prehist. Soc. II. 61 Although the Thames Valley was not actually invaded by ice..it was subject to peri-glacial phenomena. 1954Sci. News XXXIII. 67 The processes of earth sculpture operating in periglacial conditions, perhaps a considerable distance from the ice-front, produce deposits and landforms of a special type. 1967Jrnl. Glaciol. VI. 551 The limited earlier work in Southern Africa suggested that the Pleistocene climate was too dry for glaciation to have occurred, but the existence of oversteepened slopes, solifluction slumps and cirques is indicative of a periglacial environment. 1973Boreas II. 9 Bonafide ‘periglacial’ forms and deposits of late Pleistocene age are present in the Drakensberg and adjacent parts of the northeastern Cape Province.
Hence periˈglacially adv., in or by a periglacial environment.
1941Trans. R. Soc. Edin. LX. 406 The Thames lay periglacially to the ice-sheets of East Anglia. 1962Proc. Yorkshire Geol. Soc. XXXIII. 336 Dartmoor..preserves the finest set of periglacially formed tors in Britain. 1972Trans. Norfolk & Norwich Naturalists' Soc. XXII. 229 (heading) Periglacially modified chalk and chalk ridge⁓diapirs from Norwich, Norfolk. |