Ne Ch'e Ddhäwa is the Northern Tutchone name for an eroded tuya approximately 7 km up the Yukon River from Fort Selkirk (UTM zone 8V 383955 E, 69600091 N) (it has been informally called Wootten's Cone) in the
Fort Selkirk Volcanic Field of central
Yukon
Yukon () is a Provinces and territories of Canada, territory of Canada, bordering British Columbia to the south, the Northwest Territories to the east, the Beaufort Sea to the north, and the U.S. state of Alaska to the west. It is Canada’s we ...
, Canada. It has been described as a
cinder cone
A cinder cone or scoria cone is a steep, volcanic cone, conical landform of loose pyroclastic rock, pyroclastic fragments, such as volcanic ash, clinkers, or scoria that has been built around a volcanic vent. The pyroclastic fragments are forme ...
or a
subglacial mound
A subglacial mound is a type of subglacial volcano formed when lava erupts beneath a thick glacier or ice sheet. The magma forming these volcanoes was not hot enough to melt a vertical pipe right through the overlying glacial ice, instead forming ...
. The volcano erupted
subglacially between 2.0 and 2.3 million years ago during the early
Pleistocene
The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...
, erupting
hyaloclastite
Hyaloclastite is a volcanoclastic accumulation or breccia consisting of glass (from the Greek ''hyalus'') fragments (clasts) formed by quench fragmentation of lava flow surfaces during submarine or subglacial extrusion. It occurs as thin marg ...
tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock co ...
s,
breccia
Breccia ( , ; ) is a rock composed of large angular broken fragments of minerals or Rock (geology), rocks cementation (geology), cemented together by a fine-grained matrix (geology), matrix.
The word has its origins in the Italian language ...
s, and pillow breccias. These hyaloclastites locally contain exotic clasts and bodies of till melted from an ice sheet during the subglacial eruption.
[Jackson Jr., L.E., 1989. Pleistocene Subglacial Volcanism Near Fort Selkirk, Yukon
Territory. Current Research, Part E, Geological Survey of Canada, paper 89-1E,
pp. 251-256]
See also
*
Volcanism of Canada
Volcanic activity is a major part of the geology of Canada and is characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calder ...
*
List of Northern Cordilleran volcanoes
The geography of northwestern British Columbia and Yukon, Canada is dominated by volcanoes of the Northern Cordilleran Volcanic Province formed due to continental rifting of the North American Plate. It is the most active volcanic region in Cana ...
*
List of volcanoes in Canada
List of volcanoes in Canada is an incomplete list of volcanoes found in Geography of Canada, mainland Canada, in the Islands of Canada, Canadian islands and in Canadian waters. All but two Provinces of Canada, provinces, Prince Edward Island and ...
References
{{coord missing, Yukon
Volcanoes of Yukon
Cinder cones of Canada
Subglacial mounds of Canada
Northern Cordilleran Volcanic Province
Pleistocene volcanoes
Pleistocene Yukon