First glacial chronology in Corsica (Western Mediterranean Sea) based on 10Be moraine dating: evidence of two glacier extents since the Last Glacial Maximum

<p><span>The timing of past glacier fluctuations is poorly constrained in Corsica island (Western Mediterranean Sea). Although several glacial landforms and deposits were described, there are no </span><span>absolute</span><span> glacial chronolog</span><span>y</span><span>. We </span><span>will</span><span> present 19 </span><span>new</span> <span>10</span><span>Be cosmic-ray exposure ages (CRE) of boulders collected from 4 moraines located in the area of the Bastani Lake </span><span>(</span><span>Monte Renoso, Northern Corsica). For the first time on a </span><span>Mediterranean</span><span> island, mountain glacier fluctuations are documented from mo</span><span>raine CRE for the Lateglacial Period. Two main glacier advances since the Last Glacial Maximum are identified. 12 boulders of three moraines dated between 14.98 </span><span>&#177; </span><span>0.89 ka BP and 18.88 </span><span>&#177; </span><span>1.04 ka BP </span><span>reveal a</span><span> glacier extent during the Oldest Dryas (</span>Heinrich Stadial 1 - HS1)<span>. 5 boulders of one moraine dated between 12.13 </span><span>&#177; </span><span>0.69 ka BP and 13.93 </span><span>&#177; </span><span>0.79 ka BP</span><span> are attributed to the Late Glacial&#8211;Y</span><span>ounger </span><span>D</span><span>ryas </span><span>transition. Results </span><span>and associated past Equilibrium Line Altitude</span><span> will be compared with those in the Mediterranean mountain ranges. Implications for regional climatic conditions will be discussed.</span></p>