The term diagenesis is used to describe all the chemical, physical, and biological changes, including cementation, undergone by a sediment after its initial deposition, exclusive of surface weathering. Some of these processes cause the sediment to consolidate: a compact, solid substance forms out of loose material.econdary structures can also have been formed by diagenesis or the formation of a soil (pedogenesis) when a sediment is exposed above the water level. An example of a diagenetic structure common in carbonate rocks is a stylolite.
The definition of proportional is something that has a relatively correct relationship of size or that is appropriate. An example of something proportional is a woman's tiny feet to her short stature. An example of something proportional is the amount of pay a worker gets for the hours that they put in. proportional. Math. proportional.
Definition of proportion for English Language Learners. : 1  an amount that is a part of a whole. : 2  the relationship that exists between the size, number, or amount of two things. : 3  the correct or appropriate relationship between the size, shape, and position of the different parts of something.