Geological Society, London, Memoirs
Geological Society, London, Memoirs; 2003; v. 28;
p. 13-26;
DOI: 10.1144/GSL.MEM.2003.028.01.03
© 2003 Geological Society of London
Chapter 3 Carboniferous Basin Development
The Carboniferous basin development of northern England is illustrated in a series of regional seismic lines presented in this chapter. Each of the major syn-rift basins will be described in turn, using representative seismic lines (Fig. 10) that have been tied to well and outcrop control. In addition to the seismic data, depth converted geological interpretations for each of the seismic lines are presented to illustrate the development of these tectono-stratigraphic sequences across the province. Particular attention is paid to the Widmerpool Gulf because the combination of seismic quality, well penetrations and the presence of exposure of the syn-rift along-strike in Derbyshire allows us to discuss the tectono-stratigraphic sequences in detail.
The depth converted geological interpretations are based on corrected sonic logs taken from nearby boreholes, where available. Elsewhere, and for the deeper Dinantian section on most lines, seismic stacking velocities have been applied. The errors inherent in this latter method could result in errors in the depth section of as much as ±10%. Typical velocities used in the depth conversion of the Eakring and Welton sections in the East Midlands and the Northumberland Trough (Kimbell et al. 1989) are shown in Table 1.
The Widmerpool Gulf is typical of the many fault-bounded Carboniferous basins of northern England forming the southern of two main depocentres that comprise the East Midlands province (Figs 1 and 11). It is bounded to the south by the Hoton Fault, the major basin-bounding fault, and to the north by the Cinderhill Fault, a major antithetic
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