Figure 5. Time series of (A) diatom valves, (B) warm-water species Fragilariopsis doliolus and Thalassionema nitzschioides var. parva, (C) cold-water species Neodenticula seminae, (D) high-productivity species Thalassionema nitzschioides and Chaetoceros spp. (resting spores), (E) nearshore species Stephanopyxis turris, and (F) freshwater species Aulacoseira spp., Fragilaria spp., and Stephanodiscus spp. at Site 1020. Shaded areas show glacial periods according to A. Mix (pers. comm., 1998), and shaded lines depict datum levels. LO = last occurrence, OIS = oxygen isotope stage.

Figure 5. Time series of (A) diatom valves, (B) warm-water species Fragilariopsis doliolus and Thalassionema nitzschioides var. parva, (C) cold-water species Neodenticula seminae, (D) high-productivity species Thalassionema nitzschioides and Chaetoceros spp. (resting spores), (E) nearshore species Stephanopyxis turris, and (F) freshwater species Aulacoseira spp., Fragilaria spp., and Stephanodiscus spp. at Site 1020. Shaded areas show glacial periods according to A. Mix (pers. comm., 1998), and shaded lines depict datum levels. LO = last occurrence, OIS = oxygen isotope stage.