. Bulletin of the British Museum (Natural History), Geology. FROM BRACKLESHAM BEDS 317 ALUM BAY. BAGSHOT — SANDS LONDON CLAY MICROPLANKTON ZONES 2 3 4 A v? .1 V < a •C U A ^A<a n 19 in a Ltl CD < 1 to LLl _J *: u ZL,--JT-lir^L 17 16 15 " -14 - -13 : -12 - 11 5^5=z===== >CT -, J t. n 1 r 5 10 b 10a 9 I 8 1 7 - 6 ; 5 i§&>7>°*: °°°°°-°°,,°°^°Z° ^^5>^ • »ii—s-»^trT" r=z=L^z=z= 4 3 ' 2 * ti * "-a"** =^K?5t3i ( I * * * * -I^zIZr-^ 1 ( BAG SHOT SANDS -0 Ti'tiUfl'.-'t'l'^ > K N"7\ A -*p ^ ====;=;= LONDON CLAY | Q- O a- o U LU 1° Fig. 31. Comparative
. Bulletin of the British Museum (Natural History), Geology. FROM BRACKLESHAM BEDS 317 ALUM BAY. BAGSHOT — SANDS LONDON CLAY MICROPLANKTON ZONES 2 3 4 A v? .1 V < a •C U A ^A<a n 19 in a Ltl CD < 1 to LLl _J *: u ZL,--JT-lir^L 17 16 15 " -14 - -13 : -12 - 11 5^5=z===== >CT -, J t. n 1 r 5 10 b 10a 9 I 8 1 7 - 6 ; 5 i§&>7>°*: °°°°°-°°,,°°^°Z° ^^5>^ • »ii—s-»^trT" r=z=L^z=z= 4 3 ' 2 * ti * "-a"** =^K?5t3i ( I * * * * -I^zIZr-^ 1 ( BAG SHOT SANDS -0 Ti'tiUfl'.-'t'l'^ > K N"7\ A -*p ^ ====;=;= LONDON CLAY | Q- O a- o U LU 1° Fig. 31. Comparative distribution of the five microplankton zones in the Bracklesham Beds at Whitecliff Bay and Alum Bay, Isle of Wight. The comparative distribution of the five microplankton zones in the two sections is shown in Fig. 31. The diagram in Eaton (1971a : text-fig. 2 ; 1971b: text-fig. 1) indicates that all four interzonal boundaries defined at Whitecliff Bay are recogni- zable at Alum Bay. Using purely palynological data only the 1/2 and 3/4 zone boundaries can be recognized. Strictly speaking the horizon marking the 4/5 zone boundary cannot be defined at Alum Bay, but using all available geological data there are strong indications that the horizon representing the 2/3 zone boundary at Whitecliff Bay does correlate with the boundary between beds 3 and 4 at Alum Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Museum (Natural History). London : BM(NH)
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