parent material


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parent material

[′per·ənt mə‚tir·ē·əl]
(geology)
The unconsolidated mineral or organic material from which the true soil develops.

parent material

The material from which a soil has been formed.
References in periodicals archive ?
The Butt Welded Test Specimen Prepared Using The Subject Electrode Shall Pass 180 Degree Transverse Bend Test Both Root Face Bends On Testing As Per Is:3600-83 Part-5 With Mandrel Dia D Being 3T T-Thickness Of The Parent Material .
It perceives soils as a function of the soil-forming factors climate (cl), organisms (o), relief (r), parent material (p), and time (t).
Comparison of parent material SCG failure time (7893 hours when tested at 95[degrees]C and [K.
Not only the parent material affects the radiation but even the surrounding objects cause considerable loss.
The parent material for sandy soil doesn't contain many nutrients.
Williamson and Neilsen [11] showed that the soil is dry forests with on parent material of coarse pebbles than soil moist forests or with tiny parent material are more resistant to density.
The genetic markers were the basis for investigators' conclusion that the parent material of the Ames strain of anthrax spores used in the attacks came from a flask labeled RMR-1029 that was created and solely maintained by Ivins.
Rock-forming chlorites such as those found in chloritic slate, the parent material of the field location, are primarily tri-octahedral and belong to the Mg-Fe series (Dyar et al.
In contrast to the total failure observed, the following aspects should be considered: (1) a misidentification occurred for those classes with similar physical surface characteristics, such as organic matter content, iron, clay, sand, and color, which would be difficult to distinguish even in the field; (2) classes with higher iron contents due to their parent material (diabase) showed infrequent or no misidentifications for confusion with the classes derived from sandstone; (3) the Dystrochrepts soil, which is a transitional class, showed the highest number of classification errors; and (4) in some classes with low numbers of sites, an error in a single point could result in a high rate of error for the class, which would contribute to an increase in the global error rate.
The test provides a more realistic evaluation of the weld, HAZ (heat affected zone) and parent material compared to conventional small size, machined laboratory tests, in which the residual stress of the specimen may not be accounted for and the cut faces may promote excessive hydrogen charging conditions.
The point is that when a medical laboratory gets a call for imaging with radionuclides that have half-lives in the seconds or minutes, they can reach for a parent material with long shelf life that they can modify, rather than having to cook up a new batch from scratch with a nuclear reactor in the basement.
The shape of these stalactites shows that their parent material was mostly straight and cylindrical and without blemishes, apart from new concretions.