aulacogenn.

Brit.

/ɔːˈlakədʒ(ə)n/, U.S.

/ɔˈlækədʒ(ə)n/,

/ɔˈlækəˌdʒɛn/,

/ɑˈlækədʒ(ə)n/,

/ɑˈlækəˌdʒɛn/

Origin: A borrowing from Russian. Etymon: Russian avlakogen.

Etymology: < Russian avlakogen (N. S. Šatskij 1960) < ancient Greek αὖλακ- , αὖλαξ furrow ( < the same Indo-European base as Old Church Slavonic vlěšti , Lithuanian vilkti to pull, to drag) + Russian -o- -o- connective + -gen -gen comb. form.

Geology.

A narrow, sediment-filled rift valley which is thought to be the remnant of an incipient rift that failed to open further, typically one that initially formed a triple or quadruple junction with other rifts that developed fully.

ΚΠ

1963 Internat. Geol. Rev. 5 442/2 Here belong also the so-called ‘marginal transversal systems’ developed as the continuations of internal platform angles (‘aulacogens’ of N. S. Shatskiy).

1990 P. Kearey & F. J. Vine Global Tectonics vi. 109 If continental splitting occurs by the concatenation of a series of rift–rift–rift triple junctions..the rift not utilized in rupture remains preserved within the continent as a failed rift or aulacogen.

2010 Jrnl. Paleontol. 84 1100/2 The Southern Oklahoma Aulacogen was a subsiding trough within the Oklahoma Basin, an arm of a failed triple rift system.

This entry has been updated (OED Third Edition, September 2017; most recently modified version published online December 2021).

单词	aulacogen
释义	aulacogenn. Brit. /ɔːˈlakədʒ(ə)n/, U.S. /ɔˈlækədʒ(ə)n/, /ɔˈlækəˌdʒɛn/, /ɑˈlækədʒ(ə)n/, /ɑˈlækəˌdʒɛn/ Origin: A borrowing from Russian. Etymon: Russian avlakogen. Etymology: < Russian avlakogen (N. S. Šatskij 1960) < ancient Greek αὖλακ- , αὖλαξ furrow ( < the same Indo-European base as Old Church Slavonic vlěšti , Lithuanian vilkti to pull, to drag) + Russian -o- -o- connective + -gen -gen comb. form. Geology. A narrow, sediment-filled rift valley which is thought to be the remnant of an incipient rift that failed to open further, typically one that initially formed a triple or quadruple junction with other rifts that developed fully. ΚΠ 1963 Internat. Geol. Rev. 5 442/2 Here belong also the so-called ‘marginal transversal systems’ developed as the continuations of internal platform angles (‘aulacogens’ of N. S. Shatskiy). 1990 P. Kearey & F. J. Vine Global Tectonics vi. 109 If continental splitting occurs by the concatenation of a series of rift–rift–rift triple junctions..the rift not utilized in rupture remains preserved within the continent as a failed rift or aulacogen. 2010 Jrnl. Paleontol. 84 1100/2 The Southern Oklahoma Aulacogen was a subsiding trough within the Oklahoma Basin, an arm of a failed triple rift system. This entry has been updated (OED Third Edition, September 2017; most recently modified version published online December 2021). < n.1963
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