Changes

[[File:UGM_Subsurface_Fig_1.png|thumb|300px|{{figure number|1}}Characteristic morphologies of cement that shows different environments]]

[[File:UGM_Subsurface_Fig_1.png|thumb|300px|{{figure number|1}}Characteristic morphologies of cement that shows different environments]]

Folk (1974) is one of scientists that explains about the importance of Magnesium (Mg), water salinity, and diagenetic environment (vadose, phreatic, or subsurface) as mineralogical control and crystal that form cement. The chronology and micro stratigraphy of cement can be known from the morphology of thin layers of cement. “Cement stratigraphy” shows what happens during burial diagenesis (Figure 1).

Folk (1974) is one of scientists that explains about the importance of Magnesium (Mg), water salinity, and diagenetic environment (vadose, phreatic, or subsurface) as mineralogical control and crystal that form cement. The chronology and micro stratigraphy of cement can be known from the morphology of thin layers of cement. “Cement stratigraphy” shows what happens during burial diagenesis ([[:File:UGM_Subsurface_Fig_1.png|Figure 1]]).

Because the result of burial and changed composition of water, mineralogy of cement and crystal are also changed. Changed composition of water during burial because of the migration to the mixture of water with in situ interstitial water which will go through various rocks-water reaction. Calcite, dolomite, and other minerals that form cement may be formed, depend on the composition of water and the equilibrium of every minerals. If calcite is formed, usually the shape is big.

Because the result of burial and changed composition of water, mineralogy of cement and crystal are also changed. Changed composition of water during burial because of the migration to the mixture of water with in situ interstitial water which will go through various rocks-water reaction. Calcite, dolomite, and other minerals that form cement may be formed, depend on the composition of water and the equilibrium of every minerals. If calcite is formed, usually the shape is big.