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The Atlin Volcanic Field, also called the Llangorse Volcanic Field and the Surprise Lake Volcanic Field, is a group of late-
Pleistocene The Pleistocene ( , often referred to as the ''Ice age'') is the geological Epoch (geology), epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fina ...
to
Holocene The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togethe ...
cinder cone A cinder cone (or scoria cone) is a steep conical hill of loose pyroclastic fragments, such as volcanic clinkers, volcanic ash, or scoria that has been built around a volcanic vent. The pyroclastic fragments are formed by explosive eruptions o ...
s that lies on the
Teslin Plateau The Teslin Plateau is a sub-plateau, of the Yukon Plateau physiographic section, in northern British Columbia, Canada, located north of the Nakina River between Atlin Lake and Teslin Lake. See also *Atlin Volcanic Field *Nisutlin Plateau The Nis ...
east of
Atlin Lake Atlin Lake (Lingít: ''Áa Tlein'') is the largest natural lake in the Canadian province of British Columbia. The northern tip of the lake is in Yukon, as is Little Atlin Lake. However, most of the lake lies within the Atlin District of British Co ...
, Canada. The largest volcanic feature is the 1880-m-high Ruby Mountain which has been partially dissected by Pleistocene and post-Wisconsin glaciation. Two
basalt Basalt (; ) is an aphanite, aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the planetary surface, surface of a terrestrial ...
ic cinder cones at the heads of Cracker Creek and Volcanic Creek lie within glacially dissected U-shaped valleys and may be of postglacial age.


November 8, 1898, eruption

A Yukon newspaper reported in 1898 that an eruption was occurring near Atlin about 80 km south of
Gladys Lake Gladys may refer to: * Gladys (given name), people with the given name Gladys * ''Gladys'' (album), a 2013 album by Leslie Clio * ''Gladys'' (film), 1999 film written and directed by Vojtěch Jasný Vojtěch Jasný (30 November 1925 – 15 N ...
.
Miner A miner is a person who extracts ore, coal, chalk, clay, or other minerals from the earth through mining. There are two senses in which the term is used. In its narrowest sense, a miner is someone who works at the rock face; cutting, blasting, ...
s working in the area reportedly were able to work during the dark nights, due to the glow of the eruption. The article also reported that a group of people were going down from the Yukon to investigate the eruption, but no further reports were apparently made. Several recent studies, including a summary by Edwards et al. (2003) published by the Geological Survey of Canada, have determined that Ruby Mountain was definitely not the site of a historic eruption, nor were the Cracker Creek or Volcanic Creek cones. One possible explanation for the story is that placer miners found gold-bearing gravels beneath an ancient lava flow at the base of Ruby Mountain, and were actively tunneling under the old lava flow to mine the gravels. As its name suggests, Ruby Mountain is ruby-colored due to the scoriaceous tephra that covers much of its summit and the summer sun shining off of the ruby-red flanks of the volcano may have started the rumour. There have been no evidence of the eruption found in the region and the 19th-century report is considered uncertain.


Volcanoes

Volcanoes within the field include: *
Volcanic Creek Cone Volcanic Creek Cone is a small cinder cone northeast of Atlin in northwestern British Columbia. There are two cinder cones and a lava flow at least long which is present below parts of the tree covered area. The subdued form of Volcanic Creek c ...
* Cracker Creek Cone * Ruby Mountain *
Llangorse Mountain Llangorse Mountain is a mountain in northern British Columbia, Canada, located southeast of Atlin on the eastern side of the head of the Gladys River. It is a volcanic feature of the vast Northern Cordilleran Volcanic Province and is the only l ...


See also

*
Northern Cordilleran Volcanic Province The Northern Cordilleran Volcanic Province (NCVP), formerly known as the Stikine Volcanic Belt, is a geologic province defined by the occurrence of Miocene to Holocene volcanoes in the Pacific Northwest of North America. This belt of volcanoes ex ...
*
List of volcanoes in Canada List of volcanoes in Canada is an incomplete list of volcanoes found in Mainland Canada, in the Canadian islands and in Canadian waters. All but one province, Prince Edward Island, have at least one volcano. Alberta British Columbia Ne ...
*
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 ...
*
Volcanism of Western Canada Volcanism of Western Canada has produced lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, greenstone belts, submarine volcanoes, calderas, diatremes and maars, along with examples of more less common volcanic ...
*
Volcanic history of the Northern Cordilleran Volcanic Province The volcanic history of the Northern Cordilleran Volcanic Province presents a record of volcanic activity in northwestern British Columbia, central Yukon and the U.S. state of easternmost Alaska. The volcanic activity lies in the northern part of t ...


References

{{Northern Cordilleran volcanoes Volcanic fields of Canada Cinder cones of Canada Northern Cordilleran Volcanic Province Atlin District Quaternary British Columbia Cenozoic British Columbia