Coastal Depositional Dynamics of Wave, Tide and Current

将相分析应用于古海岸沉积动力学研究。海岸沉积物是由波浪、潮汐和海流作用形成的。本研究的目的是从古沉积物中提取海岸作用特征。下摩沙组吉尔伯特三角洲具有陡坡倾斜、规模大的林带和多种坡面，主要是水下坡面重力流沉积的产物。根据盆地形态和地层相分布，重建了古东京湾前缘的喷海湾沉积体系。该吐槽发育于间冰期海侵期间。我使用粒度分布来比较墨西哥湾西南部高能韦拉克鲁斯海岸边缘全新世小三角洲的沉积物运输过程。粒度特征识别了表层样品的异同，结构属性有助于区分各三角洲环境下不同的沉积条件。

Facies analysis was applied to the study of depositional dynamics of ancient coastal deposits. Coastal deposits are formed by process of wave, tide and currents. Purpose of this research is to extract feature of coastal process from ancient deposits.A Gilbert-delta in the Shimosa Formation has a steeply dipping, large -scale foreset with a variety of fades, mainly products of sediment gravity flows on subaqueous slope.A spit-bay depositional system was reconstructed at the heads of Paleo Tokyo-Bay from the shape of basin and facies distribution of the formation. The spit developed during transgression associated with interglacial period.I use grain-size distributions to compare sediment transport processes in the Holocene small deltas on the high-energy Veracruz coastal margin, southwestern Gulf of Mexico. The grain-size characteristics identify similarities and differences between surficial samples, and textural attributes help distinguish different depositional conditions in the environments of each delta.