diagenesis

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Related to diagenetically: Lithification

di·a·gen·e·sis

(dī-ă-jen'ĕ-sĭs)
The process of converting sediment to rock.
References in periodicals archive ?
Interbeds with the occurrence of diagenetically transformed silica, phosphate and carbonates within OS layers may reach around 1% of the total thickness of the oil shale unit.
For these purposes, detailed measurement bed by bed of the lithological succession, ammonite-based biochronostratigraphical studies, coupled with stable isotope analysis of diagenetically screened belemnite calcite, and total organic carbon (TOC) analysis, have been performed.
The association of these antiferromagnetic phases with diagenetic alteration is supported by their dominant presence either in totally authigenic precipitates (Caravaca Fe-O concretions, coming from oxidized pyrite framboids) or in diagenetically altered phases (Agost Fe-O spherules, which are microkrystites that have suffered almost total replacement of original material by authigenic minerales, although original textures have been preserved).
Base-surge and fall-out deposits forming the tuff-ring are diagenetically consolidated and overhang the plain.
Dentine from Bison and Palaeolama was also sampled; if the dentine from Paramylodon at Ingleside was diagenetically altered, the dentine from Bison and Palaeolama should be similarly changed.
However, there also are cases where BSR products formed relatively late diagenetically, such as in uplifted reservoirs after hydrocarbon migration.
Figure 11 shows that the paddocks are diagenetically enriched in sulfur, with many samples plotting above the normal marine field and into the euxinic field and beyond (Leventhal 1995).
The Catahoula Formation contains generally light-colored sands and clays as well as sandstones and opal-cemented orthoquartzites derived diagenetically from volcanic ash.
It is more likely that warmer fluids diagenetically altered the Knox Group carbonate rocks.
Diagenetically, the geochemical analysis indicates a cyclic type of the sedimentation during the deposition of the limestone in an epeiric platform.
Although the dark orange color of conchiolin layers renders them easily recognizable in recent corbulids, other criteria using SEM had to be developed for diagenetically altered fossils.