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AVONIAN

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Originally appearing in Volume V03, Page 67 of the 1911 Encyclopedia Britannica.

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AVONIAN , in See also:

GEOLOGY (from Gr. yp7, the earth, and Abyor, science)

geology, the name proposed by Dr A. See also:

Vaughan in 1905 (Q.J.G.S. vol. lxi. p. 264) for the rocks of See also:

LOWER

Lower Carboniferous See also:

AGE (Fr. age, through late Lat. aetaticum, from aetas)

age in the See also:

AVON

Avon See also:

GORGE

gorge at See also:

Bristol. The Avonian See also:

STAGE (Fr. 6/age; from Lat. stare, to stand)

stage appears to embrace precisely the same rocks and fossil-zones as the earlier designation " Dinantien " (see CARBONIFEROUS See also:

SYSTEM

SYSTEM) ; but its substages, being founded upon different See also:

LOCAL

local conditions and a different See also:

INTERPRETATION (from Lat. interpretari, to expound, explain, inter pres, an agent, go-between, interpreter; inter, between, and the root pret-, possibly connected with that seen either in Greek 4 p4'ew, to speak, or irpa-rrecv, to do)

interpretation of the zonal fossils, do not correspond exactly with those of the See also:

French and Belgian geologists. Substages. ZONES. Substages. Kidwellian .Dibunophyllum- Seminula Syringothyris Clevedonian Zaphrentis Tournaisien ,Cleistopora The upper Avonian (Kidwellian) is well See also:

DEVELOPED

developed about See also:

KIDWELLY (Cydweli)

Kidwelly in See also:

CARMARTHENSHIRE

Carmarthenshire. The lower substage (Clevedonian) is well displayed near See also:

CLEVEDON

Clevedon in See also:

Somerset. See A. Vaughan, " The Carboniferous See also:

LIMESTONE

Limestone See also:

SERIES (a Latin word from serere, to join)

Series (Avonian) of the Avon Gorge," Proc. Bristol Naturalists' See also:

Soc., 4th series, vol. i. pt.

2, 1906, pp. 74-168 (many plates) ; and T. F. Sibley, " On the Carboniferous Limestone (Avonian) of the Mendip See also:

AREA

area (Somerset)," Q.J.G.S. vol. ]Iii., 1906, pp. 324-380 (plates). (J. A.

End of Article: AVONIAN

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