摘要:

AbstractIn south‐west Ireland 8,000 ft (2,440 m) of marine sandstones and mudstones, the Cork Beds (?Upper Famennian to E Zone, Carboniferous, in age), overlie the Old Red Sandstone. Farther north the Old Red Sandstone is succeeded by thin Lower Limestone Shales overlain by thick Waulsortian bank limestones.A critical section (North Ringabella) west of Cork Harbour, in which 6,500 ft (1,981 m) of Old Red Sandstone and Cork Beds is exposed, is described and divided into ten formations. By comparison with sections to the south the upper beds of the Old Red Sandstone are shown to pass southward into marine sandstones (Cork Beds) of ?Upper Famennian age. The successions in the Cloyne and Cork Synclines are described and reveal the progressive northward change in the Lower Carboniferous from the argillaceous Cork Facies through a zone of isolated bank limestones (Cloyne) to a thick, 4,000 ft (1,219 m), Waulsortian bank complex (Cork). Finally an attempt is made with use of isopachyte maps to reconstruct the palaeogeography of southern Ireland in Upper Devonian and Lower Carboniferous time

ISSN:0072-1050    

DOI:10.1002/gj.3350060212

出版商:John Wiley&Sons Ltd    

年代:1969

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350060213

出版商:John Wiley&Sons Ltd    

年代:1969

数据来源: WILEY

摘要:

AbstractIn North Wales,Cruziana semplicata(Salter) is recorded from three otherwise unfossiliferous localities andTeichichnussp. (Seilacher) andPhycodes circinatum(Richter) are shown to be widely distributed within the lower Arenig (Didymograptus extensuszone) sediments.P. circinatumis also recorded from the otherwise unfossiliferous Upper Pennant Quartzite. From a discussion of the stratigraphic ranges of these trace fossils it is suggested that the rocks of theC. semplicatabearing localites are Upper Cambrian (Ffestiniog) in age while the Upper Pennant Quartzite is Ordovician, probably Arenig.

ISSN:0072-1050    

DOI:10.1002/gj.3350060214

出版商:John Wiley&Sons Ltd    

年代:1969

数据来源: WILEY

ISSN:0072-1050    

DOI:10.1002/gj.3350060201

出版商:John Wiley&Sons Ltd    

年代:1969

数据来源: WILEY