diagenesis

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Related to diagenetic: Lithification, Lithified

di·a·gen·e·sis

(dī-ă-jen'ĕ-sĭs)
The process of converting sediment to rock.
References in periodicals archive ?
In the longitudinal sections of very well-preserved rostra, with no observable diagenetic alteration, it is noticeable that calcite crystals emerge radially from successive spherulitic centers of crystal growths that are situated along the apical line (Fig.
As discussed earlier, thick sediments of the Tertiary and Lower Cretaceous (up to 8000 m, Figure 2) suggest to the burial diagenetic origin for the presence of high illite due to illitization of IS and smectite and hence the clay mineral distribution in these sediments cannot be used directly as climatic indicators.
Keywords: Amb Formation; Central Salt Range; Microfacies Analysis; Fusulinids; Diagenetic Processes; Shallow Marine Environment
Visual inspection of shell surfaces for diagenetic transformation was carried out by electron microscopy.
For this individual, there is little evidence of diagenetic contamination because Ca/P = 2.
This is the first of the two papers dealing with the chemico-mineralogical influence of diagenetic processes on Devonian carbonate and siliciclastic rocks of Estonia.
Fossil bone often has distinctly different crystal size and morphology to archaeological bone, and changes to the original apatite mineral phase by diagenetic processes can be quantified by density, porosity, crystallinity index, histological index or infra-red splitting factor (e.
In order to assess any diagenetic alteration, samples were also taken from both a known grazer and browser.
Because multiple phases of hydrothermal and diagenetic activity took place, these four mineralization phases normally occurred sequentially or simultaneously, so that in either case recystallization and mineral replacement took place within most orebodies.
18] values of the diagenetic solutions or the Cambrian Ocean are very low, (2) the Oxygen isotopic ratios are not well preserved, or (3) the diagenetic solutions are of a higher temperature.
2] of ultramafic rocks, * Large-scale intrusion of granites, producing extensive sub-horizontal zones of contact-metamorphosed serpentinite, * Tertiary-period erosion allowing mechanical and chemical weathering, * Deposition of the products of weathering in an environment fostering precipitation of magnesite, and * Subsequent vadose diagenetic processes improving quality.