Abstract
SUMMARY: Igneous rocks in the concealed North-East Leicestershire Coalfield to the east and south of Nottingham comprise both extrusive and intrusive suites. Extrusive activity, intermittent in the late Viséan and Namurian, culminated in Westphalian A with the outpouring of alkaline basaltic lavas and tuffs, apparently from several sources. In the east, these contribute almost the entire sequence, intertongueing westwards with Coal Measures sediments. The intrusive rocks comprise numerous alkaline basaltic and doleritic sills, and represent a later period of activity, possibly associated with tectonism during Westphalian C.

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