Further Investigations of Ice-Proximal Sedimentation Processes, Glacier Bay, Alaska

该奖项是为了支持对阿拉斯加冰川湾（靠近潮汐冰川终点）沉积物沉积过程的持续研究（它是Ross Powell博士提交的DPP-8619153的配套提案）。在过去的两年中，在里格斯和麦克布赖德冰川的末端附近对这些过程进行了研究。该研究现在将扩展到：(1)McMuir冰川，一个类似于McBride的潮汐冰川，但面对一个限制较少的盆地，在那里将调查细层状沉积物的分布和起源，以及与冰川距离的沉积等级；(2)伍斯特盆地，一个受限制的盆地，一个面对卡罗尔冰川的受限制盆地，在那里将研究伯格斯通直径（一种沉积物类型）的产生和分布；(3)伍斯特三角洲，在那里将测试从里格斯冰川研究中得出的关于沉积物储存和释放的假设。现场实验室将允许快速现场处理水和沉积物捕集器样本。对现代冰川海洋沉积的了解对于解释更新世冰原留下的沉积物是必不可少的，这些沉积物现在被认为是在海平面以下广泛搁浅的。诺曼·史密斯博士和他的同事罗斯·鲍威尔博士因在冰川湾研究这个问题而闻名。

This award is in support of continued study of sediment deposition processes in Glacier Bay, Alaska, near the termini of tidewater glaciers (It is a companion proposal to DPP-8619153, submitted by Dr. Ross Powell). During the past two years these processes have been investigated near the termini of Riggs and McBride Glaciers. The study will now be extended to: (1) McMuir Glacier, a tidewater glacier similar to McBride but fronting a less restricted basin, where the distribution and origin of fine laminated sediments as well as sedimentation raters versus distance from the glacier will be investigated; (2) Wachusett Basin, a restricted basin, a restricted basin fronting Carroll Glacier where the production and distribution of bergstone diamicton (a sediment type) will be studied, and (3) Wachusett Delta, where hypotheses developed from the study of Riggs glacier regarding sediment storage and release will be tested. A field laboratory will permit rapid on-site processing of water and sediment traps samples. An understanding of modern glaciomarine sedimentation is essential for interpretation of deposits left by the Pleistocene ice sheets, which are now recognized to have been extensively grounded below sea level. Dr. Norman Smith and his colleague Dr. Ross Powell are well-known for their work on this problem in Glacier Bay.