| 释义 |
solifluction Physical Geogr.|səʊ-, sɒlɪˈflʌkʃən|
Also -fluxion.
[f. L. sol-um ground, earth + -i- + fluction, fluxion.]
1. The gradual movement of waterlogged soil or other surface material down a slope, esp. where the subsoil is frozen and acts as a barrier to the percolation of surface water.
1906J. G. Andersson in Jrnl. Geol. XIV. 96 This process, the slow flowing from higher to lower ground of masses of waste saturated with water.., I propose to name solifluction. 1916T. G. Taylor With Scott 115 These symmetrical polygons are due to a slow movement of half-frozen soil, which has been noted in polar lands, and is called solifluxion or soil-creep. 1936Geogr. Jrnl. LXXXVII. 449 Solifluction also is known from the Alps, as for instance in the flysch region of the Segnas Pass. 1938C. F. S. Sharpe Landslides & Related Phenomena iii. 35 The definition given by Andersson..does not limit solifluction to cold climates. From the cases he mentions, however, and from subsequent usages by Eakin.., Nichols.., and others, the word solifluction has come to be intimately associated with frost action. 1957G. E. Hutchinson Treat. Limnol. I. i. 144 The presence of such ponds can lead to striking solifluction if the pressure of the water on the down-slope wall is great enough. 1965M. Fieldes et al. in G. J. Williams Econ. Geol. N.Z. xx. 364/2 This solifluxion is thought to account for the emplacement of plastic clays occurring at..localities in the Wellington area. 1974C. Taylor Fieldwork in Medieval Archaeol. iv. 85 Deep hollows on the faces of chalk scarps in Wessex are usually the result of periglacial action and solifluction.
2. attrib.
1946F. E. Zeuner Dating Past 119 Solifluction deposits..are a conspicuous feature of sections from the periglacial zone. 1968C. R. Twidale Geomorphol. ix. 274 Small solifluxion terraces and lobes are typical of slopes in periglacial regions. 1970R. J. Small Study of Landforms i. 2 Our knowledge of the vital role of periglaciation..is based almost wholly on analysis..of the distribution and character of solifluxion gravels.
Hence soliˈfluctional a., pertaining to or produced by solifluction; also (as a backformation) ˈsoliflucted a., that has moved by solifluction.
1924Geogr. Jrnl. LXIII. 225 On well-developed solifluctional slopes of mixed material, the different-sized stones move downwards at different rates. 1954Sci. News XXXIII. 70 On the continent, the task of dating soliflucted material is aided by interbedded sheets of loess. 1956Antiquity XXX. 99 Weathered carboniferous sandstones (whose upper solifluxional levels are in several places separated by multi-coloured clays). 1971J. N. Jennings in Jennings & Mabbutt Landform Studies from Australia & New Guinea xii. 271 Their hummockiness and the way they spread out distally with a bulging lower margin are features in favour of an end-moraine rather than a solifluctional origin. 1977Antiquaries Jrnl. LVII. 187 Some sarsens..could be derived from chalk or Greensand as could the soliflucted spread in the Vale of Pewsey. |