Wednesday, October 17, 2012

Highlights – Deltas and Sea Level

Sequence stratigraphic characterization represents an important means to subdivide complex stratigraphic successions, but the means to do so and the genetic implications continue to be debated.  In this paper, Zhu et al. describe sequence stratigraphic and chronometric analysis of extensively exposed outcrops of the Ferron Notom delta complex in south-central Utah, interpreted in the context of shoreline trajectory and accommodation-succession models.  A local accommodation curve of the deltaic complex is interpreted to indicate high-frequency and high-amplitude sea-level changes, and reflecting glacio-eustasy.  The paper implicates high-frequency and high-amplitude eustatic sea-level change as a control, driven by waxing or waning of small- to medium-sized ice sheets during episodic and ephemeral glaciations in the Antarctic region during the Late Cretaceous.

Milankovitch-scale sequence stratigraphy and stepped forced regressions of the Turonian Ferron Notom Deltaic Complex, south-central Utah, U.S.A. by Yijie Zhu, Janok P. Bhattacharya, Weiguo Li, Thomas J. Lapen, Brian R. Jicha, and Brad S. Singer

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