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rimrock

American  
[rim-rok] / ˈrɪmˌrɒk /

noun

Geology.
  1. rock forming the natural boundary of a plateau or other rise.

  2. bedrock forming the natural boundary of a placer or of a gravel deposit.


rimrock British  
/ ˈrɪmˌrɒk /

noun

  1. rock forming the boundaries of a sandy or gravelly alluvial deposit

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of rimrock

An Americanism dating back to 1855–60; rim + rock 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Get away from those sticky oilmen who can hear a dollar bill fall on the rimrock — men who would watch the world burn to increase their profits.

From Washington Post May 23, 2018

The Deschutes’s native rainbow trout take notice of the salmon flies’ arrival among the river’s rimrock walls.

From New York Times May 11, 2013

New England's sumac was already scarlet; and below the snow-dusted rimrock of the high Rockies, aspen gleamed like brass.

From Time Magazine Archive

Barely 10 a.m., yet it seemed the entire sector--a classic Western landscape of rimrock, saguaro and sage--was already swimming with fishy activity.

From Time Magazine Archive

“We’ll have the second night here,” Betonie said, indicating a stone hogan set back from the edge of the rimrock.

From "Ceremony:" by Leslie Marmon Silko

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