Search results
Results from the WOW.Com Content Network
Shale is characterized by its tendency to split into thin layers less than one centimeter in thickness. This property is called fissility. [1] Shale is the most common sedimentary rock. [2] The term shale is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the narrower sense of clay-rich fissile mudrock. [3]
The following other wikis use this file: Usage on de.wikipedia.org Ölschiefer; Usage on et.wikipedia.org Põlevkivi; Usage on fr.wikipedia.org Pic pétrolier
English: Shale bing, Niddry. The eastern end of this shale bing stretches into the square, which also contains: some arable land, a small wood and the M9. View north from NT102741. The shale is baked oilshales, the remnants after the oil has been removed.
The effect of bioturbation has been documented well in shale cores sampled: past variable critical depths where burrowing organisms can no longer survive, shale fissility will become more pervasive and better defined. Fissility is used by some geologists as the defining characteristic which separates mudstone (no fissility) from shale (fissile ...
The argillites grade into shale when the fissile layering typical of shale is developed. Another name for poorly lithified argillites is mudstone . [ citation needed ] These rocks, although variable in composition, are typically high in aluminium and silica with variable alkali and alkaline earth cations .
In geology, a mixture of both silt and clay is called mud. Rocks that possess large amounts of both clay and silt are called mudstones. In some cases the term shale is also used to refer to mudrocks and is still widely accepted by most. However, others have used the term shale to further divide mudrocks based on the percentage of clay constituents.
What links here; Upload file; Special pages; Printable version; Page information; Get shortened URL; Download QR code
Red beds may form during diagenesis.The key to this mechanism is the intrastratal alteration of ferromagnesian silicates by oxygenated groundwaters during burial. Walker's studies show that the hydrolysis of hornblende and other iron-bearing detritus follows Goldich dissolution series.