What do scientists believe about ancient and recent geologic processes?

Niformitarianism is the assumption that the same natural laws and processes that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe. It refers to invariance in the metaphysical principles underpinning science,  Modern geologists do not apply uniformitarianism in the same way as Lyell.

Answer (d) may increase or decrease porosity through dissolution or deposition;