| 释义 |
denudation|dɛnjuːˈdeɪʃən|
[a. F. dénudation, in 14th c. -acion (Hatzf.), ad. L. dēnūdātiōn-em, n. of action from dēnūdāre: see prec.]
1. a. The action of making naked or bare; a stripping off of clothing or covering; denuded condition.
1584R. Scot Discov. Witchcr. xv. xxiv. 371 Denudation and unction with holie oil. 1714Mandeville Fab. Bees (1725) I. 59 To be modest, we ought..to avoid all unfashionable denudations. 1816Keatinge Trav. (1817) I. 44 The inns..in a state of denudation of furniture. 1884Manch. Exam. 10 July 5/3 Ireland, once a land of forests, has suffered enormously from the process of denudation.
†b. fig. The action of laying bare; exposure.
1593Nashe Foure Lett. Confut. 62 All this he barely repeates without any disprouement or denudation. 1621Donne Serm. cxviii. V. 74 The Denudation of your Souls and your Sins by a humble confession.
c. The action of divesting or depriving.
1633T. Adams Exp. 2 Peter iii. 10 Such a destitution of succour, and denudation of all refuge. 1644Bp. Hall Devout Soul §10 (T.) There must be a denudation of the mind from all those images of our phantasy..that may carry our thoughts aside. 1871Earle Philol. Eng. Tongue §579 The subjunctive is distinguished from the indicative merely by the denudation of flexion.
2. Geol. The laying bare of an underlying rock or formation through the wearing away or erosion of that which lies above it, by the action of water, ice, or other natural agency. Also attrib. So denuˈdational a.
1811Farey in Phil. Trans. 242 (title), Account of the great Derbyshire Denudation. 1823W. Buckland Reliq. Diluv. 118 note, This gorge is simply a valley of denudation. 1845Darwin Voy. Nat. xviii. (1852) 345 Considering the enormous power of denudation which the sea possesses. 1878Huxley Physiogr. 149 At the present rate of denudation, it would require about 5½ million years to reduce the British Isles to a flat plane at the level of the sea. 1913A. Holmes Age of Earth iv. 60 The application of denudational statistics to the measurement of geological time will be considered. 1928Nordenskjöld & Mecking Geogr. Polar Regions 58 Old denudational surfaces or raised peneplains. 1949Proc. Geol. Assoc. LX. 165 (title) The denudation chronology of the dip-slope of the South Downs. 1954W. D. Thornbury Princ. Geomorphol. iii. 35 Some geologists have used the term denudation as if it were synonymous with gradation, but as this term implies removal of material, it is hardly logical to include deposition under it. 1956Nature 28 Jan. 166/1 The sequence of cyclic denudational landscapes. 1960B. W. Sparks Geomorphol. i. 2 In its second sense, geomorphology is the study of the evolution of landscapes. Such study is often termed denudation chronology. 1960L. D. Stamp Britain's Struct. (ed. 5) iii. 22 The cycle of denudation on the land and of sedimentation in the water is brought to a close by earth movements. |