Concepts, Models, and Observations of Climatic Controls on Sedimentation
Part 1 of this volume provides background information on the concepts of autocyclic and allocyclic processes as controls on stratigraphy, including the importance of climatic controls on sedimentation (Cecil). The first paper contains a classification for temporal climate change and a classification of seasonality of rainfall (in warm climates) based on monthly precipitation. Empirical models that relate seasonality of rainfall to fluvial transport of solids, fluvial transport of solutes, peat formation, and eolian transport are developed in the second paper (Cecil and Dulong). In addition, Part 1 presents data in support of the empirical sediment-supply models by discussing differences in solid and solute sediment supply in response to differences in seasonality of rainfall in selected river systems in Indonesia (Cecil et al.). Finally, Perlmutter and Plotnick relate variations in sediment supply to changes in climate induced by precession cycles of the earth’s orbit, and the presence or absence of polar ice, a pioneering concept they first presented in 1996 during a USGS sponsored workshop titled “Predictive Stratigraphic Analysis: Tectonic, Eustatic, and Climatic Controls on the Occurrence and Quality of Fossil Fuels”.