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{{#category_index:P|parasequence}} (pair, ∂ sē’ kw∂ns) A relatively conformable succession of genetically related beds bounded by flooding surfaces (Van Wagoner, 1995). One results from a small-scale relative sea-level rise and stillstand with little intervening fall, often with cyclicity of 100-150, 40, or 20 ka. A parasequence is terminated by another rise of sea level.