Post-Glacial Relative Sea-Level History of Oahua and Kauai

9317328 Fletcher关于夏威夷冰期后的可接受的相对海平面（RSL）历史还没有提出。晚全新世RSL以水均衡隆升逐渐减弱为特征。新的现场证据显示，随着冰川后RSL上升的高潮，考艾岛、瓦胡岛、莫洛凯岛可能还有毛伊岛的流体均衡变形出现了。火山的初始喷发时间、喷发高度和喷发结束似乎都具有岛屿特征，反映了岛屿半径、离火山中心的距离和各种地点特定因素的影响。研究将集中于获取额外的现场数据，以约束这些变量，并产生夏威夷山脊沿线的水均衡响应模型。瓦胡岛和考艾岛周围的更新世和全新世早期RSL将用淹没海岸线的岩芯记录。波浪切割的缺口和淹没的珊瑚礁群表明了两个岛屿周围可预测深度的前海平面位置。一个小型的手持式风钻可以对早期沉积的碳酸盐进行取样，测定前RSL的年代。样品的岩石学和XRD分析将有助于确定地质历史。物种特有的氧同位素含量将从保存完好、年代确定的珊瑚样本中确定。将记录冰后海侵期间海洋氧同位素化学的变化。这项研究将根据融水历史稳定同位素记录的变化，为考艾岛和瓦胡岛提供详细的RSL历史。

9317328 Fletcher An acceptable relative sea-level (RSL) history for the post- glacial period in Hawaii has not yet been proposed. Late Holocene RSL is characterized by gradually decreasing hydroisostatic uplift. New field evidence showing emergence documents the hydroisostatic deformation of Kauai, Oahu, Molokai, and probably Maui following the culmination of post-glacial RSL rise. The timing of initial emergence, its height, and it termination all appear to have an island-specific character reflecting the influence of island radius, distance from the volcanic center, and various site- specific factors. Research will focus on obtaining additional field data to constrain these variables and produce a model of hydroisostatic response along the Hawaii Ridge. Pleistocene and early Holocene RSL around Oahu and Kauai will be documented with cores from submerged shorelines. Wave-cut notches and drowned reef complexes indicate former sea-level positions at predictable depths encircling both islands. A small, hand-held pneumatic drill can sample early deposited carbonate dating former RSL. Petrographic and XRD analysis of samples will help define geologic history. Species-specific oxygen isotope contents will be determined from well preserved, dated coral samples. Variations in the oceanic oxygen isotope chemistry during the post-glacial transgression will be documented. The research will produce a detailed RSL history for Kauai and Oahu tied to changes in the stable isotope record of meltwater history.