Meltwater stream at the terminus of Russell
Glacier in southwestern Greenland. The glacial
meltwater is laden with sediment derived from
the underlying gneiss.
Field camp on a point bar of the Porcupine
River in northern Yukon, Canada. The steep
bluff of late Cenozoic sediment contains
evidence for Pliocene forests, extinct
Quaternary megafauna, permafrost dynamics,
and large glacial lakes


