Sedimentary rocks are formed from previously destroyed stones due to the precipitation of chemical elements or the accumulation of waste products of organisms. Sedimentary rocks form over millions of years consisting of the products of the destruction of stones. Impurities of those chemical compounds that are inherent in the environment in which this sediment was formed cannot exist in this unstable form (Madaan, n.d.). Under the pressure of the layers deposited above, liquid sediments begin to thicken and lose water. The loss of water leads to crystallizing those substances that existed in the solution at the time of the formation of the precipitate (Madaan, n.d.). The sediment hardens, which means that loose fragments become bound by crystallizing substances into dense rock. This process represents the final stage in the shaping of layers of the geological record.
The history of the sedimentary archives of the development of life on Earth is not limited to burial in the layering sediments. Having fallen into the sediment, organic residues become part of the rocks undergoing further changes. With the compaction and mineralization of the sediment comes the mineralization of skeletal elements, the transition to a fossil state, or fossilization. Such a formation of the fossil is often considered a recording of the history of the Earth. The researchers often call the sedimentary rocks articles, which present the result of years of natural change (Madaan, n.d.). A careful study of sedimentary rocks reveals to us the conditions of their formation hidden in the depths of past times. Consequently, it resurrects pictures of geographical landscapes that have long disappeared. Accumulating the sediments for many years, the nature changes are captured in crystallized form. Therefore, sedimentary rocks show the history of ecological processes occurring on Earth. That is why scientists call these stones valuable historical archives.
Reference
Madaan, S. (n.d.). What are sedimentary Rocks? Earth Eclipse. Web.