Talk:Fish River Canyon

message: this page looks more like some dudes travel showcase than an actual encyclopaedia article.
:WP:Be bold ;) But you are absolutely right. --Pgallert (talk) 12:33, 1 February 2010 (UTC)

message: @Michaelandsandy: For contentious reasons I'm happy with your removal of the "second largest canyon" attribute, but your reasoning is not necessarily correct. To substantiate, many geologists feel than the Yarlung Tsangpo Grand Canyon or Yarlung Zangbo Grand Canyon is not a canyon at all but rather a very deep incised valley. The same can be said of Colca Canyon in South America. The issue lies in the definition of Valley, Canyon, Gorge and Ravine. Both Zangbo and Colca do not have the near vertical sides which is characteristic of the Grand and Fish River Canyons.
Here are some definitions and explanations:
http://www.merriam-webster.com/dictionary/ravine
a small narrow steep-sided valley that is larger than a gully and smaller than a canyon and that is usually worn by running water
 
http://www.merriam-webster.com/dictionary/gorge
a narrow passage through land; especially :  a narrow steep-walled canyon or part of a canyon
 
http://www.merriam-webster.com/dictionary/canyon
a deep narrow valley with steep sides and often with a stream flowing through it
and
Very narrow, deep valley cut by a river through resistant rock and having steep, almost vertical sides. Canyons occur most often in arid or semiarid regions. Some canyons (e.g., the Grand Canyon) are spectacular natural features.
 
http://www.merriam-webster.com/dictionary/valley
a :  an elongate depression of the earth's surface usually between ranges of hills or mountains  
b :  an area drained by a river and its tributaries
Also, searching for "difference-between-canyon-gorge" we get from eHow:
Canyons and gorges refer to the same basic landforms. A canyon or gorge is a deep, narrow valley with steep, rocky sides. "Narrow" as used to describe these formations is relative to the length of the valley. Some canyons are several miles wide. The only technical difference between a canyon and a gorge is linguistic. "Canyon" comes from Spanish, while "gorge" is a French word. From a geological standpoint, the two are exactly the same.
I asked a notable geologist's opinion and he replied:
"To me a true canyon is deep fluvial erosion feature associated with an uplifted (near) peneplain surface (plateau land) and essentially is initially formed in  thick, near horizontal sedimentary strata. When the horizontal strata erodes it gives rise to a very broad, stepped erosional feature, narrowing at depth until the harder basement rocks are reached.....ie the Grand & Fish River canyons. Erosion in metamorphic and igneous rocks would give rise to a ravine or gorge. It's "horses for courses" and one can argue till blue in the face"
RudiBosbouer (talk) 11:55, 17 July 2014 (UTC)
thread_title:  Second largest Canyon 

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