Spicule assemblage, sponge

Figures 1 and 2 show the change in solubility of the acid-cleaned radiolarian and sponge spicule assemblages at 26° 1°C and 3° 1°C as a function of geologic age. Also shown are the estimated values of the high and low cristobalite and low quartz solubilities at these two temperatures. The open and crossed circles represent the initial leveling off of the concentration of Si (OH) 4 vs. time curves, and the dots are the...

Figure 8. Late OUgocene age radiolarian and sponge spicule assemblage having 39 gm specific surface area...

Figure 6, Late Miocene age radiolarmn assemblage having 118 gm specific surface area Hollow branching rod on the left is a sponge spicule.

The till pellets also contain a varied assemblage of reworked marine microfossils some of which are depicted in Fig. 17.10b. The flora includes 23 species of diatoms, as well as silicoflagellates, ebridians, cysts, radiolarians, sponge spicules, and palynomorphs identified by D.M. Harwood (Faure and Harwood 1990). Similar assemblages of marine microfossils occur in Cenozoic till of the Sirius Group at many places in the Transantarctic Mountains. This evidence... 

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