different between bedrock vs undersoil

English

Etymology

bed +? rock

Noun

bedrock (countable and uncountable, plural bedrocks)

1. (uncountable, geology, mining, engineering, construction) The solid rock that exists at some depth below the ground surface. Bedrock is rock "in place", as opposed to material that has been transported from another location by weathering and erosion.
2. A basis or foundation.
   • 2012 October 23, David Leonhardt, "[1]," New York Times (retrieved 24 October 2012):

     Many of the bedrock assumptions of American culture — about work, progress, fairness and optimism — are being shaken as successive generations worry about the prospect of declining living standards.

   • Privacy is the bedrock of individual freedom.

Usage notes

In mountainous regions, bedrock can be seen at the surface. However, these occurrences are more properly called outcrops. In construction and engineering, it is often desired to place foundations on bedrock in order to improve the stability of a structure.

Hypernyms

• rock

Translations

Anagrams

• brocked

English

Etymology

under- +? soil

Noun

undersoil (plural undersoils)

1. (geology) The soil underneath the surface / topsoil and above the bedrock.
   • 1845, Charles Darwin, Journal of Researches into the Natural History and Geology of the Countries Visited during the Voyage of the H.M.S. Beagle Round the World, 2nd edition, London: John Murray, Chapter , p. 249,^[1]

     It is a singular fact, that on the two great continents in the northern hemisphere […] we have the zone of perpetually frozen under-soil in a low latitude […]

   • 1916, D. H. Lawrence, “Discipline” in Amores, London: Duckworth, p. 37,^[2]

     But comfort me, my love, now the fires are low,

     Now I am broken to earth like a winter destroyed, and all

     Myself but a knowledge of roots, of roots in the dark that throw

     A net on the undersoil, which lies passive beneath their thrall.

   • 1945, C. S. Lewis, That Hideous Strength, London: The Bodley Head, 1965, Part Two, Chapter 5, p. 166,^[3]

     The childish levels, the undersoil of the mind, had been turned up. She wanted to be with Nice people, away from Nasty people—that nursery distinction seeming at the moment more important than any later categories of Good and Bad or Friend and Enemy.

   • 1960, Muriel Spark, The Ballad of Peckham Rye, London: Macmillan, Chapter 7,

     Dougal pointed out to his policemen friends the evidence of the Thames silt in the under-soil. ‘One time,’ he said, ‘the Thames was five miles wide, and it covered all Peckham.’

Anagrams

• underoils