micritización
Micritization is a diagenetic process that affects carbonate sediments, particularly skeletal fragments, leading to their fine-grained and opaque appearance. This transformation occurs in shallow marine environments and is primarily attributed to the activity of endolithic microbes. These organisms, including bacteria and cyanobacteria, bore into the carbonate substrates, creating microscopic borings. As these borings become more numerous and interconnected, they gradually break down the coarser skeletal material into much smaller particles.
Over time, these microscopic borings become filled with micrite, a very fine-grained (less than 4 micrometers)
Micritization is a significant process in the formation of certain types of carbonate rocks, such as micrite