The behavior of ice sheets during past warm periods can be used to help us better project how ice sheets and sea level will respond in the future under conditions of sustained warming. In turn, this knowledge can be leveraged to help build more resilient coastal communities and protect and defend our coastlines. Currently there is debate about the dynamics of the polar ice sheets during the most recent past warm period in the geological record, known as the Last Interglacial around 125,000 years ago. Some reconstructions for this time interval suggest a stable/slow rising sea level from ice sheets retreat, while others cite evidence consistent with more variable sea level from rapid ice sheet volume changes. While evidence for this problem remains controversial, a new methodology was recently applied, and firm evidence was found for a brief local fall in sea level at a single location. However, the timing and rate of sea level change are still poorly constrained, and the global extent of this feature remains unknown. This project seeks to build on this new approach and combine it with high-precision dating to refine our understanding of the rates and extent of Last Interglacial ice sheet retreat and sea level change. This project will provide professional development and mentoring opportunities for the fellow and develop a virtual field trip website using drone and other imagery to expand accessibility of sea level research. Shallow marine carbonates such as coral reefs c