A term for characterizing the physical and chemical processes that alter sediments during the interval between deposition and final lithification.
Diagenesis - The physical, chemical, and biological changes a sediment undergoes after it is deposited.
Post-depositional modification to a sediment. Typically involves compaction, cementation and induration (qv).
Biological, chemical, and physical processes in a sediment or sedimentary rock that occur after those sediments have been deposited. Important factor in taphonomy.
All of the changes which happen to a sediment after deposition, excluding weathering and metamorphism. Diagenesis includes compaction, cementation, leaching and replacement.
It is the last stage of the changing over to sedimentary rock from sediment.
All chemical, physical, and biological modifications undergone by a sediment after its initial deposition.
A group of processes that cause physical and chemical changes in sediment after it has been deposited and buried under another layer of sediment. Diagenesis may culminate in lithification of sediment, turning it into solid rock.
Changes that influence sediments after deposition. These include compaction, cementation, and chemical alteration, dissolution, and precipitation of constituents. Excluded are surficial weathering, and metamorphism of preexisting sediments.
Processes involving physical and chemical changes in a sediment after deposition that convert it to a rock. The processes include compaction, squeezing out of excess water, cementation, and sometimes recrystallisation (especially in limestones). These are processes brought about by water percolating through the sediment and by the low pressures of new sediment being deposited on top. Diagenesis is the process of turning sediment into rock, as distinct from metamorphism which involves much higher temperatures and/or pressures and changes one rock to another.
All of the changes that occur to a fossil (or more generally any sediment) after initial burial; includes changes that result from chemical, physical as well as biological processes. The study of diagenesis is part of taphonomy.
Literally meaning 'double birth', describes the processes of change that turn loose sediments into solid rock; these are a combination of consolidation (the squeezing out of water) due to the increasing pressure of overlying deposits and the formation of mineral cement between grains.
The chemical, physical, and biological changes that a sediment undergoes after initial deposition and burial that convert the sediment to consolidated rock and/or result in the creation of some forms of porosity. Such changes might result from compaction, cementation, recrystallization or replacement, but exclude metamorphism and fracturing resulting from tectonic stresses. However it is clear that diagenetic changes grade into metamorphic ones. sub-aerial weathering is also specifically excluded
any modification in a sediment between its desposition and its metamorphism, including its conversion into rock. [AHDOS
The chemical and physical changes undergone by buried sediments during lithification and compaction into sedimentary rock.
A term referring to all the changes experienced by a sediment sample under conditions of low temperature and low pressure followingdeposition. Higher temperature and pressure conditions may lead to metamorphism.
In geology and oceanography, diagenesis is any chemical, physical, or biological change undergone by a sediment after its initial deposition and during and after its lithification, exclusive of surface alteration (weathering) and metamorphism. These changes happen at relatively low temperatures and pressures and result in changes to the rock's original mineralogy and texture. The boundary between diagenesis and metamorphism, which occurs under conditions of higher temperature and pressure, is gradational.