Comments on a paper by H.G. Goodell and N.D. Watkins, “The paleomagnetic stratigraphy of the Southern Ocean: 20° West to 160° East longitude”

Antarctic Glaciation during the Tertiary Recorded in Sub-Antarctic Deep-Sea Cores

“…2) in cores of different ages may represent oscillations in temperature of the Southern Ocean, with higher percentages reflecting larger amounts of iceberg transport to sub-Antarctic water, a higher degree of glaciation on the Antarctic continent, or both. On the other hand, increases may have been due to larger amounts of debris carried in icebergs, which in turn resulted from higher erosive powers of Antarctic glaciers or greater subaerial weathering (24). If higher quartz percentages do reflect cooler conditions related to more intensive glaciation, the coldest conditions in pre-Upper Miocene times appear to have been during the lowermost Eocene (core E13-4), upper Middle Eocene (core E24-9), and the Upper Oligocene (core E23-19).…”