Sequence analysis using borehole samples and high-resolution seismic data in the Nakdong River valley yielded a good example of a river-valley sequence influenced by the complex interplay between the bottom morphology of the steep paleo-valley, varying sediment supply, and Holocene sea-level change associated with coastal currents. The late Quaternary stratigraphic sequence in the Nakdong River Estuary, approximately 60–70 m thick, forms a high-frequency sequence consisting of a set of lowstand, transgressive, and highstand systems tracts that corresponds to a fifth-order (20 ka) sea-level cycle. Four main depositional systems, including ten sedimentary facies, constitute these systems tracts: fluvial, estuarine, coastal/shoreface, and deltaic. The lowstand systems tract (LST), consisting of gravelly sand, forms a fluvial depositional system (Unit I) which fills the thalweg of river valley mainly developed before 12 ka. The transgressive systems tract (TST), showing a succession of retrograding or backstepping depositional arrangements, can be divided into two depositional systems (Unit II and III). The riverine sediments were trapped within the paleo-estuary, forming an estuarine depositional system (Unit II) developed between 12 and 7 ka. As the transgression continued, the coarse sediments were deposited and redistributed by coastal processes, resulting in coastal/shoreface depositional system (Unit III). It is characterized by an isolated sand body and thin sand veneer. The HST is composed of deltaic depositional system including delta plain, delta front, and prodelta (Unit IV). During the delta progradation, most coarse-grained sands derived from the river were deposited in the lower delta plain and delta front, forming sand bars and shoals less than 15 m deep. The remaining fine-grained sediments were transported further offshore in a suspension mode and deposited in the inner shelf off the present river mouth, forming a subaqueous prodelta. Radiocarbon and optically stimulated luminescence (OSL) dating suggest that the Holocene deltaic system was initiated by aggradational and progradational stacking patterns at approximately 8 ka during the last stage of decelerated sea-level rise, and was then followed by a prograding clinoform after the highest sea level at approximately 7 ka.

利用Nakdong河流域的钻孔样品和高分辨率地震数据进行的序列分析，很好地说明了河谷序列，受陡峭的古谷底部形态，变化的沉积物供应与全新世海相之间复杂的相互作用影响与沿海海流有关的水位变化。洛东河河口的第四纪晚期地层序列，大约60-70 m厚，形成了一个高频序列，该序列由一组低水位，海侵和高水位系统组成，对应于五阶（20 ka）海水平周期。包括十个沉积相在内的四个主要沉积系统构成了这些系统区域：河流，河口，海岸/海岸和三角洲。低层系统道（LST），由砾石砂，形成了一个河流沉积系统（单元I），该系统填充了主要在12 ka之前发育的河谷海藻。海侵系统域（TST），显示出一系列的逆行或后退沉积安排，可以分为两个沉积系统（单元II和III）。河流沉积物被困在古河口内，形成了一个在12至7 ka之间发育的河口沉积系统（单元II）。随着海侵的继续进行，粗大的沉积物通过沿海过程沉积和重新分布，形成了沿海/海岸面沉积系统（单元III）。它的特征是隔离的砂体和薄的砂单板。HST由三角洲沉积系统组成，包括三角洲平原，三角洲前缘和三角洲（第IV单元）。在三角洲升级期间，来自河流的大多数粗粒沙沉积在三角洲下平原和三角洲前缘，形成了深度小于15 m的沙洲和浅滩。剩余的细颗粒沉积物以悬浮方式进一步输送到海上，并沉积在当前河口附近的内陆架中，形成水下水底三角洲。放射性碳和光激发发光（OSL）测年表明，全新世三角洲系统是在减速的海平面上升的最后阶段，在大约8 ka时由堆积和渐进的堆积模式引发的，然后在最高的海面之后逐渐演化为斜形的。大约7 ka的水平。剩余的细颗粒沉积物以悬浮方式进一步输送到近海，并沉积在当前河口附近的内层架中，形成水下水底三角洲。放射性碳和光激发发光（OSL）测年表明，全新世三角洲系统是在减速的海平面上升的最后阶段，在大约8 ka时由堆积和渐进的堆积模式引发的，然后在最高的海面之后逐渐演化为斜形的。大约7 ka的水平。剩余的细颗粒沉积物以悬浮方式进一步输送到海上，并沉积在当前河口附近的内陆架中，形成水下水底三角洲。放射性碳和光激发发光（OSL）测年表明，全新世三角洲系统是在减速的海平面上升的最后阶段，在大约8 ka时由堆积和渐进的堆积模式引发的，然后在最高的海面之后逐渐演化为斜形的。大约7 ka的水平。