Magnetostratigraphy of Paleogene and upper Cretaceous sediments from Broken Ridge, supplement to: Gee, Jeff S; Klootwijk, Christian T; Smith, Guy M (1991): Magnetostratigraphy of Paleogene and upper Cretaceous sediments from Broken Ridge, eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 359-376

Jeff S Gee, Christian T Klootwijk & Guy M Smith
Broken Ridge represents a fragment of the oceanic Kerguelen-Heard platform, constructed at high southern latitudes in the middle Cretaceous and rifted apart during the middle Eocene (43-45 Ma). The approximately 1400-m section of prerift sediments on Broken Ridge preserves a polarity sequence that spans the middle Eocene to Upper Cretaceous (Chrons C18/C20 to C34), including a 500-m continuous sequence from the lower Eocene (C23R) to the Maestrichtian/Campanian boundary (C32R). The polarity record, together with biostratigraphic...
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