Changes

==Telogenesis==

==Telogenesis==

Sandstone that undergo deep burial under several kilometers on depth can expose to the surface by mountain building activity and unroofed by erosion. Decrese the pressure and temperature dramatically changes the characteristic of sandtone. Previously formed cements and framework grains may undergo dissolution or alteration framework grain to clay minerals.<ref name=Bogg /> Other changes may include oxidation of iron carbonate minerals and other iron-bearing minerals to form iron oxides (Boggs, 2011). The telogenesis grade into those of subaerial weathering as sedimentary rocks are expose to the surface of Earth.<ref name=Bogg />

Sandstone that undergo deep burial under several kilometers on depth can expose to the surface by mountain building activity and unroofed by erosion. Decrease the pressure and temperature dramatically changes the characteristic of sandtone. Previously formed cements and framework grains may undergo dissolution or alteration framework grain to clay minerals.<ref name=Bogg /> Other changes may include oxidation of iron carbonate minerals and other iron-bearing minerals to form iron oxides.<ref name=Bogg /> The telogenesis grade into those of subaerial weathering as sedimentary rocks are expose to the surface of Earth.<ref name=Bogg />