Article
In the context of landscapes and terrains, the term trough refers to an elongated, shallow groove between hills or raised rock formations.
Photo Credit
"Lava Trough, El Malpais National Conservation Area, New Mexico, March 30, 2015" by Sophie Ell is licensed under CC BY.
Published Works
Term Type
Manuscripts
Manuscript Occurrences
References
References
Merriam-Webster Online
2015 Trough. http://www.merriam-webster.com/dictionary/trough, accessed March 25,
 2015.