Valentianadj.

/vəˈlɛntɪən/

Etymology: < Valentia, name of a Roman province in southern Scotland + -an suffix.

Geology.

Designating or pertaining to the earliest stratigraphical division of the Silurian in Britain, preceding the Wenlockian. Also absol.

ΘΚΠ

the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > primary or Palaeozoic > Silurian > specific

Taconic1842

Ludlovian1855

wenlockian1855

Salopian1869

Downtonian1879

Valentian1879

Gotlandian1909

Salinan1909

1879 C. Lapworth in Ann. & Mag. Nat. Hist. 3 (table facing p. 455) Silurian system... Lower division (Valentian).

1880 C. Lapworth in Ann. & Mag. Nat. Hist. 3 47 In the south of Scotland (Valentia)..three subformations are recognizable... Until geologists are willing to include the Tarannon in the Llandovery it will..be best to speak of this great Scottish formation and its equivalents as the Valentian formation, its three divisions, Lower, Middle, and Upper, representing respectively the Lower Llandovery, Upper Llandovery, and Tarannon of Wales and Siluria.

1921 Q. Jrnl. Geol. Soc. 77 158 Some assistance in this comparison is afforded by the Valentian rocks of the Lake District.

1946 L. D. Stamp Britain's Struct. & Scenery xii. 109 Though various divisions of the Silurian have been proposed the old three-fold one into: (3) Ludlow Series or Ludlovian; (2) Wenlock Series or Wenlockian; (1) Llandovery Series or Valentian; has stood the test of time and is most convenient.

1974 Encycl. Brit. Macropædia XVI. 774/2 The oldest interval, the Llandoverian (or Valentian), saw the beginning of a sharp distinction between basin graptolitic shale facies and calcareous..shelf facies.

This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2019).

单词	valentian
释义	Valentianadj. /vəˈlɛntɪən/ Etymology: < Valentia, name of a Roman province in southern Scotland + -an suffix. Geology. Designating or pertaining to the earliest stratigraphical division of the Silurian in Britain, preceding the Wenlockian. Also absol. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > primary or Palaeozoic > Silurian > specific Taconic1842 Ludlovian1855 wenlockian1855 Salopian1869 Downtonian1879 Valentian1879 Gotlandian1909 Salinan1909 1879 C. Lapworth in Ann. & Mag. Nat. Hist. 3 (table facing p. 455) Silurian system... Lower division (Valentian). 1880 C. Lapworth in Ann. & Mag. Nat. Hist. 3 47 In the south of Scotland (Valentia)..three subformations are recognizable... Until geologists are willing to include the Tarannon in the Llandovery it will..be best to speak of this great Scottish formation and its equivalents as the Valentian formation, its three divisions, Lower, Middle, and Upper, representing respectively the Lower Llandovery, Upper Llandovery, and Tarannon of Wales and Siluria. 1921 Q. Jrnl. Geol. Soc. 77 158 Some assistance in this comparison is afforded by the Valentian rocks of the Lake District. 1946 L. D. Stamp Britain's Struct. & Scenery xii. 109 Though various divisions of the Silurian have been proposed the old three-fold one into: (3) Ludlow Series or Ludlovian; (2) Wenlock Series or Wenlockian; (1) Llandovery Series or Valentian; has stood the test of time and is most convenient. 1974 Encycl. Brit. Macropædia XVI. 774/2 The oldest interval, the Llandoverian (or Valentian), saw the beginning of a sharp distinction between basin graptolitic shale facies and calcareous..shelf facies. This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2019). < adj.1879
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