Changes

{| class = "wikitable"

{| class = "wikitable"

|-

|-

! Variable

! Variable || Sandstones || Carbonates

! Sandstones

! Carbonates

|-

|-

| Sediment composition

| Sediment composition || High variability (depending on [http://encyclopedia2.thefreedictionary.com/provenance provenance] and [[Depositional environments|depositional environment]]) || Low variability [variations of [[limestone]] and [[dolomite]] ]

| High variability (depending on [http://encyclopedia2.thefreedictionary.com/provenance provenance] and [[Depositional environments|depositional environment]])

| Low variability [variations of [[limestone]] and [[dolomite]] ]

|-

|-

| Cement mineralogy

| Cement mineralogy || [[Quartz]], [[calcite]], [[dolomite]], [[clay]], and [[anhydrite]], etc. || [[Aragonite]], high- and low-Mg calcite, dolomite

| [[Quartz]], [[calcite]], [[dolomite]], [[clay]], and [[anhydrite]], etc.

| [[Aragonite]], high- and low-Mg calcite, dolomite

|-

|-

| Original [[Pore systems|pore geometry]]

| Original [[Pore systems|pore geometry]] || Intergranular || Intergranular predominates, but intragranular is important

| Intergranular

| Intergranular predominates, but intragranular is important

|-

|-

| Ultimate pore geometry

| Ultimate pore geometry || Intergranular = intercrystalline > moldic || Intergranular = intercrystalline = moldic > microporosity

| Intergranular = intercrystalline > moldic

| Intergranular = intercrystalline = moldic > microporosity

|-

|-

| Uniformity of [[Pore and pore throat sizes|pore size]], shape, and distribution

| Uniformity of [[Pore and pore throat sizes|pore size]], shape, and distribution || Fairly uniform within a facies || Ranges from fairly uniform to extremely heterogeneous, even within a facies

| Fairly uniform within a facies

| Ranges from fairly uniform to extremely heterogeneous, even within a facies

|-

|-

| Influence of [[diagenesis]]

| Influence of [[diagenesis]] || Minor to major || Usually major

| Minor to major

| Usually major

|}

|}