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首页> 外文期刊>Facies >Indo-Pacific and Atlantic spurs and grooves revisited: the possible effects of different Holocene sea-level history, exposure, and reef accretion rate in the shallow fore reef
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Indo-Pacific and Atlantic spurs and grooves revisited: the possible effects of different Holocene sea-level history, exposure, and reef accretion rate in the shallow fore reef

机译：重新探讨印度洋-太平洋和大西洋的马刺和沟纹：浅全新前海礁不同全新世海平面历史，暴露和珊瑚礁积聚率的可能影响

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摘要

Shallow fore-reef areas worldwide are usually characterized by spurs and grooves. A comparison of examples from the three world oceans suggests that Indo-Pacific spurs and grooves are shaped predominantly by erosion, whereas western Atlantic spur and groove systems are largely a product of constructive processes. I propose that this difference is caused by regional differences in Holocene sea-level change, which controlled exposure to waves and currents, and reef-accretion rates. The transgressive–regressive sea-level curve in the Indo-Pacific realm, i.e., the Mid-to-Late Holocene sea-level fall in these areas has maintained high-energy conditions in the shallow fore reef. Higher exposure to waves and currents favors erosion and leads to a dominance of crustose coralline algae that have relatively slow growth rates. In the western Atlantic, the transgressive Holocene sea level has caused Mid-to-Late Holocene deepening and has maintained accommodation space for reef accretion. Fast-growing acroporid corals thrive under lower exposure and are more common than coralline algae. The fossil record of the spur and groove system is rather poor, which is probably a consequence of the need of excellent, three-dimensional outcrops for identification.
机译：世界范围内的浅礁区通常以马刺和沟纹为特征。对来自三个世界海洋的例子进行的比较表明，印度太平洋的马刺和海槽主要是由侵蚀形成的，而西大西洋的马刺和海槽系统主要是建设性过程的产物。我认为，这种差异是由于全新世海平面变化的区域差异引起的，该差异控制了对波浪和洋流的接触以及珊瑚礁的吸收率。印度太平洋一带的海侵-回归海平面曲线，即这些地区的中新世晚期海平面下降，一直保持着浅滩礁的高能状态。较高的波浪和海流暴露有利于侵蚀，并导致具有较慢生长速率的甲壳珊瑚藻占主导地位。在西大西洋，海侵全新世海平面引起了中新世至晚新世加深，并为珊瑚礁的积聚提供了容纳空间。快速生长的顶孢珊瑚在较低的暴露量下会旺盛生长，比珊瑚藻更常见。支沟系统的化石记录相当差，这可能是由于需要出色的三维露头进行识别的结果。

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