Order and disorder in a sedimentary system of reef limestones

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Unexpected events are not exceptional in geological processes, and could be detected even in well-ordered sedimentary systems. Deposition of sandstone beds intercalated in reef limestones is a typical example of an occurrence of disorderly events in a highly ordered sedimentary process.In this study we have considered mathematical properties of the van del Pol's equation in which sea-level fluctuations and metabolic activities of reef-building organisms are included as indispensable parametric factors controlling limestone deposition. Analytical results infer that the unexpected intercalation of sandstone beds in reef limestones has been a consequence of nonlinear reciprocal behavior between geological and biological agencies.
日本堆積学会の論文