Deposits from mountain glaciers provide an important record of Quaternary climatic fluctuations but have proved difficult to date directly. A chronology has been obtained for glacial deposits at Bloody Canyon, California, by measurement ofthe accumulation of chlorine-36 produced by cosmic rays in boulders exposed on moraine crests. The accumulation ofchlorine-36 indicates that episodes of glaci...

In Alaska, lichenometry continues to be an important technique for dating late Holocene moraines. Research completed during the 1970s through the early 1990s developed lichen dating curves for five regions in the Arctic and subarctic mountain ranges beyond altitudinal and latitudinal treelines. Although these dating curves are still in use across Alaska, little progress has been made in the pas...

[1] Here we use Ice, Cloud and land Elevation Satellite (ICESat)-derived elevations and surface characteristics to investigate the Malaspina Glacier of southern Alaska. Although there is significant elevation variability between ICESat tracks on this glacier, we were able to discern general patterns in surface elevation change by using a regional digital elevation model (DEM) as a reference sur...

A radiocarbon date of 19 100 ±100 yr BP (SUA 2856) dates the maximum extent ofglacier ice at Lake Beatrice in the upper Dante IJ ,,,,,,I,,>r 1'1 •• ... nrlrrh", Late Wisconsin in western Tasmania. Study ofthe Dante Glacier outwash fan deposits shows that rna'l:'Or'\'vlT(~'r"hr',e'; a lDalaec~soJ and an older outwash formation, and are interstratified with fluvial silts detritus deposited of the...

Accurate reconstruction of Laurentide Ice Sheet volume changes following the Last Glacial Maximum is critical for understanding ice sheet contribution to sea-level rise, resulting influence meltwater on oceanic circulation, and spatial temporal patterns deglaciation. Here, we provide empirical constraints thinning during last deglaciation by measuring in situ cosmogenic 10Be 81 samples collecte...

The Gulf of Bothnia is a shallow, elongate basin dividing Sweden and Finland, and is located in the centre of the terrain formerly occupied by the Fennoscandian Ice Sheet (FIS). It is considered to have hosted a variety of different glaci-dynamic environments during the evolution of the FIS, but direct glacial geological or geomorphological evidence from the Gulf itself is almost entirely lacki...