|
Type locality of the Duval Moraines, once believed to be greater than 60 ka, these moraines were most likely deposited between 20 and 10 ka, as determined by cosmogenic exposure dating. See recent GSAB paper for more info. |
|
Type locality of the Duval Moraines, once believed to be greater than 60 ka, these moraines were most likely deposited between 20 and 10 ka, as determined by cosmogenic exposure dating. See recent GSAB paper for more info. |
|
Highly weathered, upland tor surfaces have cosmogenic nuclide abundances indicating these surfaces were most likely covered by cold-based ice, snow fields, or buried by till during the last glaciation. |
|
Crater Lake---located in Pangnirtung Pass, these bedrock surfaces were exposed sometime after 1976 by the retreat of Tumbling Glacier (shown below). Samples retrieved from Crater Lake have cosmogenic nuclide abundances indistinguishable from our blanks indicating that the advance and retreat of Tumbling Glacier was sufficient to re-set the "cosmogenic clock." |
