Bedrock is the native "consolidated" rock underlying the surface of a terrestrial planet, usually the
Earth. Above the bedrock is usually an area of broken and weathered " unconsolidated" rock in the basal subsoil. The top of the bedrock is known as "rockhead" and identifying this, via excavations, drilling or geophysical methods, is an important task in most Civil engineeringprojects. Superficial deposits (also known as drift) can be extremely thick such that the bedrock lies hundreds of metres below the surface [ [http://www.dnr.state.oh.us/Portals/10/pdf/newsletter/2004No.1.pdf Swinford,E.Mac What the glaciers left behind - drift thickness map of Ohio, Ohio Department of Natural Resources, Division of Geological Survey, newsletter 2004, No.1.] ] .
geologic mapof an area will usually show bands of differing rock type; i.e., rock that would be exposed at the surface if all soilor other superficial deposits were removed. The different rock strata or layers that are indicated may be a result of either nonparallel (sloping) surface erosion at the edges of flat strata "or" normal surface erosion of tilted strata that has removed the upper portions of higher layers.
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bedrock — index center (essence), foundation (basis) Burton s Legal Thesaurus. William C. Burton. 2006 … Law dictionary
bedrock — (n.) also bed rock, 1850, from BED (Cf. bed) (n.) + ROCK (Cf. rock) (n.). Figurative use by 1869; as an adjective by 1881 … Etymology dictionary
bedrock — ► NOUN 1) solid rock underlying loose deposits such as soil. 2) the fundamental principles on which something is based … English terms dictionary
bedrock — ☆ bedrock [bed′räk΄ ] n. 1. solid rock beneath the soil and superficial rock 2. a secure foundation 3. the very bottom 4. basic principles or facts … English World dictionary
Bedrock (EP) — Infobox Album | Name = Bedrock Type = EP Artist = The Foetus All Nude Revue Released = July 1987 Recorded = Milo and Paradise, London Genre = Industrial Length = ?:?? Label = Self Immolation/Some Bizzare Producer = J. G. Thirlwell Reviews = *… … Wikipedia
bedrock — [[t]be̱drɒk[/t]] 1) N SING The bedrock of something is the principles, ideas, or facts on which it is based. Mutual trust is the bedrock of a relationship... Working class voters form the bedrock of Labour s support. ...the bedrock principles of… … English dictionary
Bedrock — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Bedrock est un mot d origine anglaise qui peut désigner plusieurs choses : Bedrock est utilisé en géologie pour désigner la croûte terrestre. Bedrock … Wikipédia en Français
bedrock — 1. n. fundamentals; solid facts. □ Let’s get down to bedrock and quit wasting time. □ This is bedrock the truth. 2. mod. fundamental. □ You’ve been avoiding the bedrock issues all your life. □ … Dictionary of American slang and colloquial expressions
bedrock — I. noun Date: 1850 1. the solid rock underlying unconsolidated surface materials (as soil) 2. a. lowest point ; nadir b. basis II. adjective Date: 1894 solidly fundamental, basic, or reliable … New Collegiate Dictionary
bedrock — /bed rok /, n. 1. Geol. unbroken solid rock, overlaid in most places by soil or rock fragments. 2. bottom layer; lowest stratum. 3. any firm foundation or basis: Technical courses will be founded on a bedrock of sound, general education so as to… … Universalium