Figure F7. Spectrum analysis of four common planktonic species, showing long (500–100 k.y.) and short (12–6.2 k.y.) cycles. Globigerinoides ruber is characterized by a dominant 100-k.y. cycle and many obliquity, precession, and shorter cycles, but lacks the 500-k.y. eccentricity cycle.

Figure F7. Spectrum analysis of four common planktonic species, showing long (500–100 k.y.) and short (12–6.2 k.y.) cycles. Globigerinoides ruber is characterized by a dominant 100-k.y. cycle and many obliquity, precession, and shorter cycles, but lacks the 500-k.y. eccentricity cycle.