

Clastic Dikes: Dispelling a Periglacial Origin
What Does Periglacial Mean? "Periglacial" is a term that packs a punch. Like "tundra" or "permafrost", it stands in for a full suite of...


Periglacial Soil Wedges East of Glacier National Park
Brown soil wedges follow polygonal crack networks in fine grained sediment (lakebeds) south of Browning, MT. The features formed during...


A Visit to Rich Chambers' Jocko Site - Arlee, MT
Last week I had the pleasure of a day in the field with Rich Chambers and Larry Smith. Rich did early work on Glacial Lake Missoula...

Clastic Dikes Form Polygonal Networks
Networks of Pleistocene clastic dikes are sometimes visible on bladed slopes or surfaces that have had all vegetation removed. Aerial...


Syngenetic Ice Wedge Growth
Syngenetic ice wedges form in polar regions in places where new sediment is periodically added to the ground surface (Layers A, B, C)....