Hii Arun!
Nicolaus Steno gave the laws of stratigraphy which describes the pattern in which the rock layers are deposited. The four laws or principals of stratigraphy are -
Law of superposition
Law of original horizontality
Law of cross- cutting relationships
Law of lateral continuity
In order to get a detailed information you can refer to research websites or books such as Principles of stratigraphy by Micheal E. Brookfield or indian stratigraphy books. Hope this helps.
All the best!