 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| • |
Need to identify controls on glacial erosion rates, as has
|
|
been done for fluvial erosion for which precipitation rates
|
|
and basin relief and size exert first-order controls. Similar
|
|
quantitative relationships between glacial sediment yields
|
|
and hydrologic or other basin characteristics have not yet
|
|
been established.
|
|
|
| • |
Peak rates of glacial erosion, inferred from sediment yields
|
|
of tidewater glaciers, surpass those of fluvial erosion by up
|
|
to an order of magnitude.
They have recently come into
|
|
question, however, because
|
|
|
|
• |
biases inherent in the approach
|
|
|
|
• |
essentially nothing is known about characteristics
of the glaciers or
|
|
of the drainage basins that cause these high
sediment yields.
|
|
|
|
• |
Little know about whether peak erosion rates, found
in southern
|
|
|
Alaska, are representative of other glacial-tectonic
settings.
|
|