pediplainn.

Brit.

/ˈpɛdᵻpleɪn/, U.S.

/ˈpɛdəˌpleɪn/

Origin: Formed within English, by compounding. Etymons: pediment n., plain n.¹

Etymology: < pedi- (in pediment n.) + plain n.¹ (compare quot. 1935 at main sense). Compare earlier peneplain n. and panfan n., and slightly later pediplane n.

Geomorphology.

An extensive plain formed in a desert by the coalescence of neighbouring pediments (believed to represent a late stage in the cycle of erosion in arid and semi-arid climates). Cf. pediplane n.

ΘΚΠ

the world > the earth > land > landscape > level land > [noun] > level place or plain > types of

sand-flat1773

alluvial plain1803

sand-plain1818

sandveld1824

tundra1841

bench-land1845

salt flat1873

panfan1915

panplain1933

pediplain1935

soda plain1946

1935 J. H. Maxson & G. H. Anderson in Jrnl. Geol. (Chicago) 43 94 Widely extending rock-cut and alluviated surfaces of this type formed by the coalescence of a number of pediments and occasional desert domes may be called ‘pediplains’.

1968 C. R. Twidale Geomorphol. xi. 308 Pediplains..are smoother, and less dissected [than peneplains].., they are mostly dominated by concave profiles, and meet the adjacent uplands in a piedmont angle.

1973 Nature 9 Nov. 75/2 Recession of valley nickpoints inland from the coastal margin was followed by valley widening, scarp retreat and pedimentation, leading ultimately to the formation of gently undulating pediplains or erosion surfaces.

1986 B. W. Sparks Geomorphology (BNC) (ed. 3) 321 It could well be that some of the summit surfaces of the Hercynian blocks are Eogene pediplains.

Derivatives

ˈpediplained adj.

ΘΚΠ

the world > the earth > land > landscape > level land > [adjective] > plain > type of

pediplained1968

1968 Geogr. Jrnl. 134 29 Nubia was a large, flat, pediplained area wherein the wadis or small rivers were connected to a yet unknown hydrographic system.

1995 Jrnl. Afr. Earth Sci. 20 114/1 The characteristic pediplained surface exposed so spectacularly in the Aqaba complex, is missing.

This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022).

单词	pediplain
释义	pediplainn. Brit. /ˈpɛdᵻpleɪn/, U.S. /ˈpɛdəˌpleɪn/ Origin: Formed within English, by compounding. Etymons: pediment n., plain n.¹ Etymology: < pedi- (in pediment n.) + plain n.¹ (compare quot. 1935 at main sense). Compare earlier peneplain n. and panfan n., and slightly later pediplane n. Geomorphology. An extensive plain formed in a desert by the coalescence of neighbouring pediments (believed to represent a late stage in the cycle of erosion in arid and semi-arid climates). Cf. pediplane n. ΘΚΠ the world > the earth > land > landscape > level land > [noun] > level place or plain > types of sand-flat1773 alluvial plain1803 sand-plain1818 sandveld1824 tundra1841 bench-land1845 salt flat1873 panfan1915 panplain1933 pediplain1935 soda plain1946 1935 J. H. Maxson & G. H. Anderson in Jrnl. Geol. (Chicago) 43 94 Widely extending rock-cut and alluviated surfaces of this type formed by the coalescence of a number of pediments and occasional desert domes may be called ‘pediplains’. 1968 C. R. Twidale Geomorphol. xi. 308 Pediplains..are smoother, and less dissected [than peneplains].., they are mostly dominated by concave profiles, and meet the adjacent uplands in a piedmont angle. 1973 Nature 9 Nov. 75/2 Recession of valley nickpoints inland from the coastal margin was followed by valley widening, scarp retreat and pedimentation, leading ultimately to the formation of gently undulating pediplains or erosion surfaces. 1986 B. W. Sparks Geomorphology (BNC) (ed. 3) 321 It could well be that some of the summit surfaces of the Hercynian blocks are Eogene pediplains. Derivatives ˈpediplained adj. ΘΚΠ the world > the earth > land > landscape > level land > [adjective] > plain > type of pediplained1968 1968 Geogr. Jrnl. 134 29 Nubia was a large, flat, pediplained area wherein the wadis or small rivers were connected to a yet unknown hydrographic system. 1995 Jrnl. Afr. Earth Sci. 20 114/1 The characteristic pediplained surface exposed so spectacularly in the Aqaba complex, is missing. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < n.1935
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