Bedrock is the native consolidated rock underlying the Earth's surface. Above the bedrock is usually an area of broken and weathered unconsolidated rock in the basal subsoil. The term implies that the rock lies in beds, or strata. Under any given location on the surface of the planet, rock will be found. Earth (IPA: , often referred to as the Earth, Terra, the World or Planet Earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth largest. ... Loose, unattached, unstratified particles of earth material such as gravel, sand, sediment or dust, without combined rigidity or cohesiveness due to a lack of binding or natural mineral cement (such as gypsum or limestone) to hold it together; as opposed to consolidated. ... Óģ Ķ ķ Ļ ļ Ņ ņ Ŗ ŗ Ş ş Ţ ţ Ć ć Ĺ ĺ Ń ń Ŕ ŕ Ś ś Ý ý Ź ź Đ đ Ů ů Č č Ď ď Ľ ľ Ň ň Ř ř Š š Ť ť Ž ž Ǎ ǎ Ě ě Ǐ ǐ Ǒ ǒ Ǔ ǔ Ā ā Ē ē Ī ī Ō ō Ū ū ǖ ǘ ǚ ǜ Ĉ ĉ Ĝ ĝ Ĥ ĥ Ĵ ĵ Ŝ ŝ Ŵ ŵ Ŷ ŷ Ă ă Ğ ğ Ŭ ŭ Ċ ċ Ė ė Ġ ġ İ ı Ż ż Ą ą Ę ę Į į Ų ų Ł ł Ő ő Ű ű Ŀ ŀ Ħ ħ Ð ð Þ þ Œ œ Æ æ Ø ø Å å Ə ə – — … [] [[]] {{}} ~ | ° § → ≈ ± − × ¹ ² ³ ‘ “ ’ ” £ € Α α Β β Γ γ Δ δ Ε ε Ζ ζ Η η Θ θ Ι ι Κ κ Λ λ Μ μ Ν ν Ξ ξ Ο ο Π π Ρ ρ Σ σ ς Τ τ Υ υ Φ φ Χ χ Ψ ψ Ω ω ... Goldenville Strata exposed at a quarry in Bedford, Canada. ...

The term bedrock may be somewhat misleading, since in many locations, the bedrock may change over a short distance, or the technical bedrock may be a thin stratum overlying quite different rock.

A geologic map of an area will usually show bands of differing rock type exposure, i.e., rock that would be exposed at the surface if all soil 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. A geologic map is a special-purpose map made for the purpose of showing subsurface geological features. ... Loess field in Germany Soil horizons are formed by combined biological, chemical and physical alterations. ...

See also

• geology
• igneous rock
• metamorphic rock
• rock (geology)
• sedimentary rock
• stratigraphy
• topographygoogle.com