Abstract
Recently evolutionary studies of strath terrace point out that in the environmental settings with minimal sea-level effects and relatively long-term steady tectonic uplifting, climatic fluctuations-controlled variations in sediment flux and river discharges could influence the formation of strath terraces. In this article I collected case studies from such an environmental background globally, and summarized three conceptual models of strath terrace formation. The models and strath terraces dating data indicate that bedrock straths or strath terraces could be formed possibly in the transitions from glacial periods to interglacial period, or from stadial to interstadial interval. According to the findings of the strath terrace studies, I question the classification of fluvial terrace proposed by Bull (1990). Especially, Bull (1990) implied that strath terrace and tectonic stream terrace are synonymous. Therefore, I suggest that it would be appropriate to simply use descriptive terminology for fluvial terrace in literatures, and interpret fluvial terrace genesis case by case.
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