Relative and absolute age dating
Glacier ice exposed in the ice-cored moraines is well bedded with layers of clean white bubbly ice, ice with debris content (dispersed, laminated and stratified), and clear, massive, bubble-free blue ice with large crystals with dispersed (occasional) cobbles, pebbles or small boulders. At the terminal moraines, rounded and striated boulders can be found.
We investigated six glaciers on Ulu Peninsula: Unnamed Glacier, Triangular Glacier, IJR-45, Alpha Glacier and San José Glacier. J., Brachfeld, S., Leventer, A., Hjort, C., Hillenbrand, C.-D., and Evans, J., 2009.
The glacier ice exposed in the moraine is interpreted as basal glacier ice formed by adfreezing near the glacial margin[7-9].
The basal ice facies becomes interbedded with the clear blue basal ice by shearing and thrusting.
The Ulu Peninsula comprises large areas of Cretaceous sandstone and mudstone, overlain by multiple layers of basalt and hyaloclastite.
Radiocarbon dates on organic remains on James Ross Island suggest that the Ulu Peninsula became ice-free following the Last Glacial Maximum by around 7500 years ago, with a glacial readvance that finished around 4700 years ago.