Geological Magazine; January 2008; v. 145; no. 1;
p. 105-147; DOI: 10.1017/S0016756807003925
© Cambridge University Press (CUP)
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Figure 14. Quantitative palynological profile of the main terrestrial and marine palynomorphs. from the Penarth Group at Hampstead Farm Quarry. Quantitative numbers were determined using a Lycopodium spike as per Thomas et al. 1993 and are expressed in thousands of palynomorph g–1 rock. Three numbers (114 000, 123 000 and 390 000) are off the scales used. Also shown is the Total Organic Carbon content (TOC %), calcite % (both measured using a CE-1108 elemental analyser) and the relative abundance of AOM. Bed numbers are from Donovan, Curtis & Curtis (1989). Note the very characteristic double peak of Rhaetogonyaulax rhaetica separated by an acme of Cymatiosphaera polypartita. The abundances of all the palynomorphs declines markedly in the Cotham Member with R. rhaetica declining the least and hence becoming relatively abundant.
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