- Interior Plateau
It has several subdivisions, these being:
Bonaparte Plateau(part of the Thompson Plateauin some definitions, and also known as the Kamloops Plateau)
Thompson PlateauThe Cariboo and Chilcotin Plateaus are separate by the Fraser River. The Nechako Plateauflanks the Fraser on both sides; its southern boundary is defined by the West Road River(aka the Blackwater River) and the Quesnel River, and its northern boundary are the Omineca Mountainsand the Cassiar Mountains, which are two major subdivisions of the Interior Mountains.
Several mountain ranges and hill-systems are included in the definition of this region. Among these are:
Clear Range(includes the Scarped Range)
Cornwall Hills(not formally part of the Pavilion Range, but adjoining the Clear Range on its east)
Trachyte Hills(not formally part of the Pavilion Range, but adjoining the Clear and Marble Ranges on their east)
*The Arrowstone Hills (SW edge of the
*The Rainbow Range (sometimes assigned to either the
Pacific Rangesor Kitimat Rangessubranges of the Coast Mountains)
*The Quanchus Range (western edge of the
Nechako Plateau, in the midst of the Nechako Reservoir/Ootsa Lake)
*The Telegraph Range (
*The Fawnie Range (
*The Pattullo Range (sometimes classified as part of the
Some classifications systems assign the Pattullo Range to the
Hazelton Mountains, which are part of the larger Skeena Mountainscomplex, but then theoretically also is the Quanchus Range. Also, the Cariboo Mountainsare sometimes included as part of the Interior Plateau.
Three areas liminal to the plateau, i.e. sometimes considered part of it rather than the adjoining mountain ranges, are the
Shuswap Highland, Okanagan Highlandand Quesnel Highland.
History of the Interior Plateau
The location of the
Interior Plateauin North Americais between the Rocky Mountains and the Pacific Coast Ranges.
The first human presence was in
8500 BC. Bisonremains, Clovisand other fluted points date back to this time frame. An important sites in the area is at Wenatchee site (located in Washington).
The Windust phase is dated between 10600 BC and 7100 BC. At the
Lind Couleesite in east-central Washington, leaf-shaped projectile points and knives date between 8500-5500 BC. Based on archaeological evidence, it is suggested that these people were hunters, subsisting also from fishingand plant gathering. The presence of sea shells gives an indication that trading took place. A small oval shaped dwelling was also found at the Paulina Lakesite in Oregon, dating to 7100 BC.
Cascade phasetook place from 7100-4300 BC, and was marked by a slight change in toolkit technology from the Windust peoples. A residentialstructure was found for this group, dating between 5500-4300 BC. Other pithouses followed between 4000-2000 BC. Most residential structures are located on rivers. During the historic era, plants and salmonwere the staple foods, which give us an indication that Cascade groups harvested salmon runs in the summer and fall.
The Late Period, dated to about
2500 BC, the pithouse ( quiggly hole) came into existence. Other markers of this period include the increasing number of pithouses and settlements. Fishing continued to increase, and technology advanced, introducing more specialized barb fish spears and composite toggling harpoons. Other technology was used as well, including nets and weirs. Trade networks also flourished during this time, using sea shells, turquoise, fish grease and others.
Columbia River Plateau
Chilcotin Plateau Basalts
* Fagan, Brian M. "Ancient North America". London: Thames and Hudson, Ltd., 2005
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