progradationn.

Brit.

/ˌprəʊɡrəˈdeɪʃn/, U.S.

/ˌproʊɡrəˈdeɪʃ(ə)n/

Origin: Formed within English, by derivation. Etymons: pro- prefix¹, gradation n.

Etymology: < pro- prefix¹ + gradation n., after prograde v.

Physical Geography.

The outward growth or advance of a shore or shoreline as a result of the accumulation of waterborne sediment or beach material.

ΘΚΠ

the world > the earth > structure of the earth > formation of features > sedimentation > [noun] > progradation

progradation1909

prograding1910

1909 W. M. Davis in Geogr. Jrnl. 34 303 There is good reason for regarding the action of the streams in terracing or degrading the former valley floors as the cause of the progradation of the strand-plain.

1937 S. W. Wooldridge & R. S. Morgan Physical Basis Geogr. xxi. 332 Progradation may result from the extensive deposition of river alluvium, as in deltas.

1967 Oceanogr. & Marine Biol. 5 130 Brothers (1954) concluded that dune formation during subsequent periods of shoreline progradation added great quantities of sand to the foreland around Auckland.

1986 B. W. Sparks Geomorphol. (BNC) (ed. 3) 281 Deposition starts [and]..progradation ensues, which further reduces the gradient and so increases deposition by a positive feedback process.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	progradation
释义	progradationn. Brit. /ˌprəʊɡrəˈdeɪʃn/, U.S. /ˌproʊɡrəˈdeɪʃ(ə)n/ Origin: Formed within English, by derivation. Etymons: pro- prefix¹, gradation n. Etymology: < pro- prefix¹ + gradation n., after prograde v. Physical Geography. The outward growth or advance of a shore or shoreline as a result of the accumulation of waterborne sediment or beach material. ΘΚΠ the world > the earth > structure of the earth > formation of features > sedimentation > [noun] > progradation progradation1909 prograding1910 1909 W. M. Davis in Geogr. Jrnl. 34 303 There is good reason for regarding the action of the streams in terracing or degrading the former valley floors as the cause of the progradation of the strand-plain. 1937 S. W. Wooldridge & R. S. Morgan Physical Basis Geogr. xxi. 332 Progradation may result from the extensive deposition of river alluvium, as in deltas. 1967 Oceanogr. & Marine Biol. 5 130 Brothers (1954) concluded that dune formation during subsequent periods of shoreline progradation added great quantities of sand to the foreland around Auckland. 1986 B. W. Sparks Geomorphol. (BNC) (ed. 3) 281 Deposition starts [and]..progradation ensues, which further reduces the gradient and so increases deposition by a positive feedback process. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < n.1909
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