Question

Differences between allochemical and orthochemical rocks

Answer 1

Answer:   Allochemical rocks r those that contain grains brought in form elsewhere allochemical rocks have grains that may consist of fossiliferous materials , oodis , peloids , etc. Orthochemical rocks are those in which the carbonate crystallized in place .

Answer 2

Difference between allochemical and orthochemical rocks.

Explanation:

• The orthochemical or truly chemical rocks are produced by chemical or biochemical precipitation within the basin and shows non-clastic texture.
• Evaporite such as halite, anhydrite and gypsum and non-evaporites such as limestone, dolomite and ironstone are examples of such precipitates.
• Allochemical rocks are produced initially within a basin by chemical precipitation,these rocks are fragmented ,transported and redeposited elsewhere and show clastic texture. It is intermediate between orthochemical and terrigenous rocks