| Abstract/Description or Keywords |
Low-gradient landslides (spreads and flows) involving sensitive clays have modified the uplifted glacimarine landscape of the Terrace–Kitimat area in northern coastal British Columbia. Broad, shallow landslide depressions are clustered throughout the area, along streams, delta fronts, and lake shores, with some occupied by wetlands. Several large landslides have occurred in the past century, and there are earlier oral First Nation’s accounts of landslides. Radiocarbon analyses indicate that one-third of dated landslides plot between 3500 and 1900 years ago, perhaps relating to a period of wetter climate. The presence of quick clays, continued stream incision into sensitive sediments, and a projected wetter future climate suggest that this landscape will continue to be modified by low-gradient landslides. |
