Table 1 Results of element analysis using a Philips XL 30 ESEM-FEG scanning electron microscope and a Philips EDAX (EDS) instrument. Filament 1 is the filament showed in figure 2A, B and figure 4. Filament 2 is the filament showed in figure 2C and D. Filament 3 is the filament showed in figure 2E and F. Filament 4 is the filament in 3A. Filament 5 is the filament in 3B and C. The filaments are enriched in C, compared to the volcanic glass they are attached to and similar in carbon composition to the calcite it is embedded in. One filament is enriched in C relative to the calcite. The enrichments in C indicate the biogenic origin of the microfossils. The filaments show a chemical conformity despite the fact that they occur at various depths and that they originate from three different seamounts. Slight variations between the elements occur but K and Ca are the only elements that are exchangeable.

From: Advantages of doubly polished thin sections for the study of microfossils in volcanic rock