Sequanianadj.

/sɛˈkwɑːnɪən/

Forms: Also Sequanien.

Etymology: < French Séquanien, < Latin Sēquani an ancient Celtic people of eastern Gaul: see -ian suffix.

Geology.

Name of a substage of the Upper Jurassic in north-western Europe, below the Kimmeridgian; of or pertaining to this substage and the rocks that characterize it, and the geological age during which they were deposited.

ΚΠ

1851 Q. Jrnl. Geol. Soc. 7 ii. 75 The characteristic condition of most of the Jurassic formations (Sequanian, Kimmeridgian, and Portlandian).

1881 Q. Jrnl. Geol. Soc. 37 ii. 571 De Loriol..wishes to call the Astartian and Corallian by one name, Sequanian.

1882 A. Geikie Text-bk. Geol. 797 Corallien. Some authors take the upper part of this group into a separate section under the name of Sequanien, largely developed in the east of France, where it consists of massive limestones sometimes 400 feet thick.

1903 A. Geikie Text-bk. Geol. (ed. 4) II. 1156 The Oxfordian and Corallian divisions of the Jurassic system, or Callovian, Oxfordian, and Sequanian formations, are in general feebly represented in the Alpine region.

1970 R. J. Small Study of Landforms iv. 145 The widely out-cropping Bathonian dolomite has been carved into a multitude of minor karstic forms which are overlooked by gently rounded hills of Sequanian limestone.

This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).

单词	sequanian
释义	Sequanianadj. /sɛˈkwɑːnɪən/ Forms: Also Sequanien. Etymology: < French Séquanien, < Latin Sēquani an ancient Celtic people of eastern Gaul: see -ian suffix. Geology. Name of a substage of the Upper Jurassic in north-western Europe, below the Kimmeridgian; of or pertaining to this substage and the rocks that characterize it, and the geological age during which they were deposited. ΚΠ 1851 Q. Jrnl. Geol. Soc. 7 ii. 75 The characteristic condition of most of the Jurassic formations (Sequanian, Kimmeridgian, and Portlandian). 1881 Q. Jrnl. Geol. Soc. 37 ii. 571 De Loriol..wishes to call the Astartian and Corallian by one name, Sequanian. 1882 A. Geikie Text-bk. Geol. 797 Corallien. Some authors take the upper part of this group into a separate section under the name of Sequanien, largely developed in the east of France, where it consists of massive limestones sometimes 400 feet thick. 1903 A. Geikie Text-bk. Geol. (ed. 4) II. 1156 The Oxfordian and Corallian divisions of the Jurassic system, or Callovian, Oxfordian, and Sequanian formations, are in general feebly represented in the Alpine region. 1970 R. J. Small Study of Landforms iv. 145 The widely out-cropping Bathonian dolomite has been carved into a multitude of minor karstic forms which are overlooked by gently rounded hills of Sequanian limestone. This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020). < adj.1851
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