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In geology, clay-with-flints is the name given by William Whitaker in 1861 to a peculiar deposit of stiff red, brown, or yellow clay containing unworn whole flints as well as angular shattered fragments, also with a variable admixture of rounded flint, quartz, quartzite, and other pebbles.
Another example of the use of spectral gamma ray logs is to identify specific clay types, like kaolinite or illite. This may be useful for interpreting the environment of deposition as kaolinite can form from feldspars in tropical soils by leaching of potassium; and low potassium readings may thus indicate the presence of one or more paleosols. [2]
Silt – Soil type consisting of fine grain deposits that offer good water retention but poor drainage. It is more fertile than sand. Silex – A flint- and sand-based soil type found primarily in the Loire Valley that is a formed from a mixture of clay, limestone and silica. [2] Slate – Soil type that is the most common found in the Mosel ...
Upper Mercer flint or Upper Mercer chert is a type of flint, or a pure form of chert, found in Coshocton, Hocking, and Perry counties of Ohio. Made of forms of silica and quartz , the hard and brittle stone was used by prehistoric people to make tools and weapons.
Bite Test; This is not recommended. This involves biting a mineral to see if it’s generally soft or hard. This was used in early gold exploration to tell the difference between pyrite (fools gold, hard) and gold (soft). Several of the minerals where a bite test could be diagnostic contain heavy metals.
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A concretion is a hard, compact mass formed by the precipitation of mineral cement within the spaces between particles, and is found in sedimentary rock or soil. [1] Concretions are often ovoid or spherical in shape, although irregular shapes also occur.
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