relative sea-level changes 相对海平面变化
Identification of condensed section is not only the key to understanding of sequence structure, but also critical to analysis of global relative sea level changes during geologic history.
对凝缩段的识别不仅是认识层序结构的关键，而且对分析地质历史时期全球相对海平面变化至关重要。
Sequences tend to show cyclicity of changes in relative sea level and widespread unconformities, processes of sedimentation and sources of sediments, climate and tectonic activity over time.
层序多显示相对的海平面以及广泛分布的不整合，沉积作用的过程，沉积物的来源，气候和构造活动等随地质时代变化的旋回性。
It turns out that the dey factor for the formation of sponge reef was sea level changes and that the growth of reef was in concord with relative eustasy rise.
研究表明，甲马矿区海绵礁形成的关键因素是海平面变化，其主体的发育与海平面相对上升同步。
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