Changes

==Average TOCs==

==Average TOCs==

The table below (from <ref name=ch06r3 />) shows average TOC values for different sedimentary rock types.

The table below<ref name=ch06r3 /> shows average TOC values for different sedimentary rock types.

{| class = "wikitable"

{| class = "wikitable"

|-

|-

! Rock type

! Rock type || TOC value, %

! TOC value, %

|-

|-

| Average for all shales

| Average for all shales || 0.8

| 0.8

|-

|-

| Average for shale source rocks

| Average for shale source rocks || 2.2

| 2.2

|-

|-

| Average for calcareous shale source rocks

| Average for calcareous shale source rocks || 1.8

| 1.8

|-

|-

| Average for carbonate source rocks

| Average for carbonate source rocks || 0.7

| 0.7

|-

|-

| Average for all source rocks

| Average for all source rocks || 1.8

| 1.8

|}

|}