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are recognized here:(a) the rarocinctum ZoneFirst adopted for Speeton by Spath (1924, table) the zone is retainedprovisionally (Rawson 1971b, p.72) for Beds LB5D-LB4 where large,crushed crioceratitids occur, apparently close to the zonal index.(b) the fissicostatum-rude ZonesFragments of Hoplocrioceras cf. fissicostatum (Roemer sensu Neumayr &Uhlig) occur in LB3 (Rawson 1971b, p. 72) and other, fragmentarycrioceratitids higher in the succession (LB2, LB1 and the Cement Beds).No further subdivision is yet possible.(c) the bidentatum ZoneParancyloceras bidentatum is common in small exposures of high Upper B,where it occurs with Toxoceratoides spp.The base of the Barremian is provisionally drawn at the base of the rarocinctumZone (Rawson 1971a, p. 80), but this is based in effect on the disappearance of aHauterivian genus (Simbirskites) rather than on the appearance of a well-establishedBarremian form. Micropalaeontological evidence supports this (Neale 1974) thoughforaminifera indicate that the boundary could possibly be higher, in Bed LB4C(Fletcher 1973).The AptianThe stage was named after the village of Apt (Basses-Alpes) in south-east France,and proposed for strata containing an ‘Upper Neocomian’ fauna (d’Orbigny 1840).Separation of the classic French Aptian into two substages was formalized by theintroduction of the terms ‘Bedoulian’ (Toucas 1888) and ‘Gargasian’ (Kilian 1887).To these, Breistroffer (1947) added a third, topmost substage, the ‘Clansayesian’, forbeds previously referred to the Albian by Jacob and others.In Britain, the Aptian is most extensively developed in the Lower Greensand ofsouthern and eastern England (Fig. 4). A less complete sequence occurs in the top BBeds and lower A Beds of the Speeton Clay. The Aptian was primarily a time ofmarine transgression, during which the sea returned to southern England after thegreat Purbeck-Wealden regression. Brackish-water ‘Wealden’ conditions lingered oninto the Aptian in the Swanage to Worbarrow Bay area of Dorset, presumably in theestuary of a Lower Greensand river.The substages Bedoulian, Gargasian and Clansayesian are not used in Britain,where a simple grouping of zones into Lower and Upper Aptian is employed (Casey1961a):Hypacanthoplites jacobiUpper Aptian Parahoplites nutfieldiensisCheloniceras (Epicheloniceras) martinioidesTropaeum bowerbankiT . . Deshayesites deshayesiLower Aptian ^ e , .Deshayesites forbesiProdeshayesites fissicostatus
EAST KEiJTSa outcrops 9B WEST K r {IT 8D SUSSEX 9 ISLE OF WIGHTU pperG re e n san dS u lp h u rBandN odule b e d s a tj u n c t i o n w ith ,G a u ltN odule b e d s a tj u n c t i o n w ithG a u ltN odule b e d s a tj u n c t i o n v i t hG a u ltB asem ent beeF o lk e s to n e BedsF o lk e s to n e Bed9F o lk e s to n eBedsm ain m assb a s a ln o d u lebedS a n d g a te BedsB oughton’G ro u p ’P u tte n h a mBedsB a r g a te BedsF u l l e r s E a rt:TopC h e rtsM a r e h ill C layI r o n SandsB a rg a te BedsGroup XV?G roupsG roupsV III - X IIH ythe BedsA t h e r f i e l d C layb eds b e lo vCoalman LaneA t h e r f i e l d C layw ithP e rn a BedTop H ythep e b b le bedm id H ythesan d sLow er H ytheS to n eA t h e r f i e l d C layw ithP e rn a BedH ythe BedsA t h e r f i e l d C laycroupsVI - V IIG roups IV-VL o b s te r Beds& C ra c k e rsA t h e r f i e l dC lay s . s .n T T T I T T T I T WF i g . 4 . Correlation of the Aptian and Albian of southern England.
Page 1 and 2: PETER FRANKLIN RAWSON, DENNIS CURRY
Page 3: PETER FRANKLIN RAWSON, DENNIS CURRY
Page 6 and 7: F i g . 2. Structural setting of Cr
Page 8 and 9: Viking Graben (Howitt 1974; Hancock
Page 10 and 11: In the non-marine Purbeck/Wealden s
Page 12 and 13: to be lineage-range zones, e.g. the
Page 14 and 15: The English Valanginian zonation su
Page 18 and 19: The fissicostatus Zone was proposed
Page 20 and 21: The loricatus Zone is a comparative
Page 22 and 23: The TuranianThe Turonian stage was
Page 24 and 25: The Zone of Inoceramus labiatus con
Page 26 and 27: GLOBOTRUNCANID ZONESTETHYAN N. EURO
Page 28 and 29: cortestudinarium Zone. In the botto
Page 30 and 31: Two Santonian texanitids have been
Page 32 and 33: 1959, 1967), corresponding with the
Page 34 and 35: Fletcher (1966) described the foram
Page 36 and 37: Sandstone is cut out and the Claxby
Page 38 and 39: Lower Cretaceous thins and becomes
Page 40 and 41: (90 ft) near Soham, Cambridgeshire,
Page 42 and 43: 405-4 m (1330 ft) in the Warlingham
Page 44 and 45: initially led to this conclusion (C
Page 46 and 47: F i g . 5 . Cretaceous of the Engli
Page 48 and 49: SEA29/25 - 1A lbiank2 mCAMBRIDGESHI
Page 50 and 51: Further still to the south-west, in
Page 52 and 53: of 5-5 m for A! and A2 combined, bu
Page 54 and 55: attributions of the inland pits in
Page 56 and 57: elow the bottom of the Totternhoe S
Page 58 and 59: Yorkshire (Column 22)The sequence g
Page 60 and 61: 1961 = Zone of Exogyra columba of H
Page 62 and 63: ------ 1967. Origin of the Hastings
Page 64 and 65: ------1961b. Geological age of the
Page 66 and 67:
land. Pp. 161-68 in C a s e y , R .
Page 68 and 69:
J o h n s o n , R. J. 1975. The bas
Page 70 and 71:
------ 1974. Cretaceous Foraminifer
Page 72 and 73:
oberen deutschen Kreide. Palaeontog
Page 74 and 75:
V e n a b l e s , E. M. 1 9 3 1 . N
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