The Quarterly journal of the Geological Society of London (1917) (14782101465)

Identifier: quarterlyjourna731917geol (find matches)
Title: The Quarterly journal of the Geological Society of London
Year: 1845 (1840s)
Authors: Geological Society of London
Subjects: Geology
Publisher: London (etc.)
Contributing Library: Smithsonian Institution Libraries
Digitizing Sponsor: Biodiversity Heritage Library

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s and memoirs. Tlie present ))a;)er supplements thedest-riptioii of the Carboniferous Limestone Series ;jfiven in those)iul)Heations, in the liijht of reetiit researches on the Carboniferousrocks of this country and MelLrium by the late l>r. .\. ^auLJ:hanand others. * Ah ropards the tiold-\V(trk upon which this paper Ih based, all that p«»rtion■»f the outcrop whirh lies west uf the river Taff has been investipitod byMr. l>ixey. and the i»ortion ea>t of the Taff by Prof. Sibly. In the absenceof Mr. Dixey on military service, the whole paper has been written bv Prof.Sibly. ■^ Newport sheet (N.S. 1-inch map 24J)) and The Country around New-port ISOO, 2nd ed. ll»o;); Canliff sheet (N.S. 1-inch map2t;a) and TheCountry around Cardiff li»ii2. 2nil ed. 1012; Bridjrend sheet (N.S. 1-inchmap 21 \- 2(»2) and The Country around Bridgend IJH>4. These Memoirswill be referred to as the Newport Memoir, the * Canliff Memoir.and the• lirid^-eiid Memoir, respeitively. 1^
Text Appearing After Image:
part L^ IAHIK)NlFKI(()r> MMKsTONK of s. walks cOAF-riEI.I). W-i Till iiatiirc and siL^niitli-ancc of tin- liroad variations sliowii l)ytlie (arl)oniferous Liiin-stont Scries in tlic extensive South Walesoutcrops liave been admirably defined by Dr. Stnihan in the follow-iuLT word> : Thu Ciirhoiiiferous Limestone Series presented a successton of stages intlevelojunent. The fullest ilevelupnieut was exhibited in the southernmostoccurrences, as reyanled both the sequence and the thickness of zones.A second stajjre, showLnj,- an incfjmplete secjuence anarts of the marginof the fi»alHeld. Lastly, in the nortiierninnst occurrences, near Abergavennyand at Pen-cerig-ciilcli. the series dwindled away to 100 feet or less, while inPembrokeshire it was wholly overstepped. The inference followed that thecoast-line ran through Pembrokeshire, and not far north of Al^ergavennj. ^ Within the comparat

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