| 词条 | Barrier Volcano |
| 释义 |
| name = Barrier Volcano | photo = | photo_caption = | elevation_m = 1032 | elevation_ref = | prominence = | listing = List of volcanoes in Kenya | location = Kenya | range = | map = Kenya | map_caption = Location in Kenya | label_position = left | coordinates = {{coord|2.319198|N|36.587906|E|type:mountain_region:KE_scale:100000|format=dms|display=inline,title}} | range_coordinates = | topo = | type = Shield volcano | age = | volcanic_arc/belt = | last_eruption = 1921 or 1922 | first_ascent = | easiest_route = }} The Barrier Volcano is an active shield volcano located in the north of Kenya. It is last known to have erupted in 1921.{{sfn|Global Volcanism}} DescriptionThe Barrier Volcano was given its name because it forms a barrier about {{convert|20|km}} long across the Kenyan Rift Valley. It has a width of {{convert|15|km}} and separates Lake Turkana to the north and the Suguta Valley and the small Lake Logipi to the south. The volcanic complex consists of four distinct volcanoes. From west to east these are Kalolenyang, Kakorinya, Likaiu West and Likaiu East. The foundation rocks are mainly basalt. About 90% of the volume is trachyte.{{sfn|Woolley|2001|p=106}} Kakorinya is the youngest of the group and forms the center of the complex, with a well-preserved circular crater that has not been breached.{{sfn|Woolley|2001|p=106}} The {{convert|3.8|km}} wide summit caldera of Kakorinya was formed about 92,000 years ago.{{sfn|Global Volcanism}} Much of the floor of the caldera is filled with trachytic and phonolitic lava domes and flows that recently erupted within the caldera and along its ring fracture. There are scoria cones and lava flows from the early Holocene on the north and south flanks of the volcano complex. In the 19th and 20th centuries there have been explosive eruptions and lava flows from Teleki on the northern side and from Andrew's cone on the south side of Kakorinya. The last known eruption was in 1921.{{sfn|Global Volcanism}} See also
ReferencesSources{{refbegin}}
|title=Global Volcanism Program: The Barrier |accessdate=2011-12-30}}
|title=Alkaline rocks and carbonatites of the world, Part 3 |first=Alan Robert |last=Woolley |publisher=Geological Society |year=2001 |ISBN=1-86239-083-5}}{{refend}}{{Great Rift Valley, Kenya}}{{DEFAULTSORT:Barrier (Volcano)}}{{Kenya-geo-stub}} 3 : Polygenetic shield volcanoes|Volcanoes of Kenya|Active volcanoes |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。