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首页> 外文期刊>Marine Geology >Submarine canyons of Santa Monica Bay, Southern California: Variability in morphology and sedimentary processes
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Submarine canyons of Santa Monica Bay, Southern California: Variability in morphology and sedimentary processes

机译：南加州圣莫尼卡湾的海底峡谷：形态和沉积过程的变化

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摘要

High-resolution autonomous underwater vehicle (AUV)-based multibeam bathymetry and chirp sub-bottom profiles were used to map the axial channels of Santa Monica and Redondo Canyon-Channel Systems, offshore southern California. The new bathymetry reveals the seafloor morphology at 1-meter grid resolution, whereas sub-bottom chirp and regional multichannel seismic reflection (MCS) profiles allow characterizing the shallow and deep sedimentary record, respectively. Even though these two submarine canyons have coexisted under the same regional controls (i.e., tectonics and sea-level changes), they have evolved distinctly over time. Turbidity current activity along the Redondo Canyon-Channel System as a result of canyon-head incision to the presentday shoreline resulted in a different geomorphology compared to the abandoned Santa Monica Canyon.
机译：基于高分辨率自主水下航行器（AUV）的多波束测深和chi下部轮廓用于绘制加利福尼亚南部沿海圣莫尼卡和雷东多峡谷通道系统的轴向通道。新的测深法揭示了1米网格分辨率下的海底形态，而下底chi声和区域多通道地震反射（MCS）剖面则分别表征了浅层和深层沉积记录。即使这两个海底峡谷在相同的区域控制下共存（即构造学和海平面变化），但随着时间的推移它们已经明显地发展了。由于峡谷顶切口到今天的海岸线，沿着雷东多峡谷通道系统的浊度活动与被遗弃的圣莫尼卡峡谷相比，形成了不同的地貌。

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