@inbook{54abffc908fb4c5ab6bbd4bf2660d82e,
title = "Geometry and tectonic evolution of megasequences in the Plymouth Bay Basin, English Channel",
abstract = "A complete Carboniferous-Permian-Triassic succession is found within the anomalously thick (10 km to acoustic basement) Plymouth Bay Basin (PBB). The evolution of this succession provides us with the most complete tectonic/stratigraphic history of the late Palaeozoic to Triassic interval of the North Atlantic area. Deep and commercial seismic data from the PBB reveal the existence of four prominent seismic megasequences, bounded by strong and laterally persistent reflections. Isochore mapping and seismic facies analysis of each megasequence demonstrate that depocentres changed upward through the succession in a consistent manner, from E-W to elongate, NW-SE-orientated depocentres. This change may have occurred in the late Carboniferous or early Permian. The two-fold tectonic history of the PBB explains the thickness of sedimentary fill: an early basin formed above a deep crustal ramp, developed during Variscan compression along the Lizard-Start thrusts (and others); a later NW-SE early extensional or strike-slip basin depocentre is coincident with the earlier basin centre, creating further accommodation space.",
author = "A. Ruffell and Coward, {M. P.} and M. Harvey",
year = "1995",
month = jan,
day = "1",
doi = "10.1144/GSL.SP.1995.091.01.10",
language = "English",
series = "Geological Society Special Publication",
publisher = "Geological Society of London",
pages = "193--214",
editor = "Boldy, {S. A. R.}",
booktitle = "Permian and Triassic rifting in northwest Europe",
address = "United Kingdom",
}