Palaeotopography of the northern portion of the Telychian (Silurian) turbidite basin in central Wales

✍ Scribed by D.M.D. James

• Book ID: 102223883
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 413 KB
• Volume: 40
• Category: Article
• ISSN: 0072-1050
• DOI: 10.1002/gj.1028

✦ Synopsis

New palaeocurrent data from the country northeast and southwest of Corris (central Wales) indicate that Telychian sandstones in the Devil's Bridge Formation hereabouts were transported from both the northeast and northwest, consistent with topographical control by down-to-southeast movement on the Bala Lineament. This conclusion is supported by considerations of thickness variation and by evidence for listric detachment faulting in the formation at Bwlch y Groes. Towards Plynlimon, flow is broadly southerly and suggests confinement by the northward extension of the Bronnant Fault. A facies and palaeocurrent map is presented for the utilis sub-Biozone of the Telychian which links with work by the British Geological Survey between Aberyswyth and Rhayader where, by contrast, palaeoflow is to the NNW.