The biostratigraphy of the Gault and Upper Greensand formations (Middle and Upper Albian) in the BGS Selborne boreholes, Hampshire

Abstract

Three cored boreholes at Selborne proved a greatly expanded Gault and Upper Greensand succession compared to those known elsewhere in the Weald, and the thickest Lower Gault yet documented onshore in the UK. Macrofaunas, microfaunas, marine palynofloras and lithology are used to subdivide the c . 140 m thick Gault and Upper Greensand succession. Dramatic expansion of parts of the Upper Gault and Upper Greensand in the Selborne succession is consistent with previously reported evidence for the influence of block fault movements on sedimentation and erosional winnowing.