prodeltaadj.n.

Brit.

/ˈprəʊˌdɛltə/, U.S.

/ˈproʊˌdɛltə/

Origin: Formed within English, by derivation. Etymons: pro- prefix², delta n.

Etymology: < pro- prefix² + delta n.

Geomorphology.

A. adj.

Lying beyond the sloping front of the main body of a delta, below the depth of effective wave erosion.

ΘΚΠ

the world > the earth > land > land mass > shore or bank > land near river > [adjective] > delta > part of

prodelta1940

prodeltaic1965

1940 E. S. Hills Outl. Struct. Geol. i. 4 The bottom-sets or prodelta clays represent the finer detritus spread out over the floor of the sea or lake in which the delta was formed.

1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles xiv. 319 The high percentage of silt in the clays has led to a comparison with some modern pro-delta sediments.

2000 A. R. Orme Physical Geogr. N. Amer. xxi. 441 Farther offshore, the loading of prodelta clays by fluvial silt and sand causes submarine landslides.

B. n.

The prodelta part of a delta.

ΘΚΠ

the world > the earth > land > land mass > shore or bank > land near river > [noun] > delta > part of

prodelta1963

1963 D. W. Humphries & E. E. Humphries tr. H. Termier & G. Termier Erosion & Sedimentation xi. 227 This bed is, perhaps, comparable to that formed on a prodelta.

1975 G. D. Hobson & E. N. Tiratsoo Introd. Petroleum Geol. ii. 32 The sediments of the delta front, pro-delta and continental shelf are organically fairly rich.

2001 M. L. Droser & X. Li in A. Y. Zhuravlev & R. Riding Ecol. Cambrian Radiation vi. 114 Arumbera Sandstone units 3 and 4 record upward transition from prodelta or basinal muddy deposits at the base through delta front to coastal delta plain deposits at the top.

Derivatives

ˌprodelˈtaic adj. = sense A.

ΘΚΠ

the world > the earth > land > land mass > shore or bank > land near river > [adjective] > delta > part of

prodelta1940

prodeltaic1965

1965 Science 30 Apr. 635/3 The Polarstar Formation probably accumulated under near-shore marine conditions, perhaps in a prodeltaic environment.

1986 S. R. Tubb et al. in J. Brooks et al. Habitat of Palaeozoic Gas in N.W. Europe 64/2 Regional considerations suggest that deltaic and pro-deltaic sands can be anticipated in this section.

1993 R. J. Snead in J. F. Shroder Himalaya to Sea xvi. 341 At the coast west of Ormara in the Kalmat Khor area, are late Miocene-Pliocene deltaic and prodeltaic sediments.

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

单词	prodelta
释义	prodeltaadj.n. Brit. /ˈprəʊˌdɛltə/, U.S. /ˈproʊˌdɛltə/ Origin: Formed within English, by derivation. Etymons: pro- prefix², delta n. Etymology: < pro- prefix² + delta n. Geomorphology. A. adj. Lying beyond the sloping front of the main body of a delta, below the depth of effective wave erosion. ΘΚΠ the world > the earth > land > land mass > shore or bank > land near river > [adjective] > delta > part of prodelta1940 prodeltaic1965 1940 E. S. Hills Outl. Struct. Geol. i. 4 The bottom-sets or prodelta clays represent the finer detritus spread out over the floor of the sea or lake in which the delta was formed. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles xiv. 319 The high percentage of silt in the clays has led to a comparison with some modern pro-delta sediments. 2000 A. R. Orme Physical Geogr. N. Amer. xxi. 441 Farther offshore, the loading of prodelta clays by fluvial silt and sand causes submarine landslides. B. n. The prodelta part of a delta. ΘΚΠ the world > the earth > land > land mass > shore or bank > land near river > [noun] > delta > part of prodelta1963 1963 D. W. Humphries & E. E. Humphries tr. H. Termier & G. Termier Erosion & Sedimentation xi. 227 This bed is, perhaps, comparable to that formed on a prodelta. 1975 G. D. Hobson & E. N. Tiratsoo Introd. Petroleum Geol. ii. 32 The sediments of the delta front, pro-delta and continental shelf are organically fairly rich. 2001 M. L. Droser & X. Li in A. Y. Zhuravlev & R. Riding Ecol. Cambrian Radiation vi. 114 Arumbera Sandstone units 3 and 4 record upward transition from prodelta or basinal muddy deposits at the base through delta front to coastal delta plain deposits at the top. Derivatives ˌprodelˈtaic adj. = sense A. ΘΚΠ the world > the earth > land > land mass > shore or bank > land near river > [adjective] > delta > part of prodelta1940 prodeltaic1965 1965 Science 30 Apr. 635/3 The Polarstar Formation probably accumulated under near-shore marine conditions, perhaps in a prodeltaic environment. 1986 S. R. Tubb et al. in J. Brooks et al. Habitat of Palaeozoic Gas in N.W. Europe 64/2 Regional considerations suggest that deltaic and pro-deltaic sands can be anticipated in this section. 1993 R. J. Snead in J. F. Shroder Himalaya to Sea xvi. 341 At the coast west of Ormara in the Kalmat Khor area, are late Miocene-Pliocene deltaic and prodeltaic sediments. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < adj.n.1940
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