How do the layers of rock form?

ROCKS AND LAYERS. ... The layers of the rocks are the pages in our history book. Most of the rocks exposed at the surface of Earth are sedimentary--formed from particles of older rocks that have been broken apart by water or wind. The gravel, sand, and mud settle to the bottom in rivers, lakes, and oceans. read more

As time passes, more and more materials get eroded and settle on the older layers. Thus, layer upon layer is formed. The lower layers undergo intense pressure due to the weight of the upper layers, eventually evolving into rocks. Some examples of sedimentary rocks are sandstone, limestone, shale, conglomerate, and gypsum. read more

The rock layers is formed by erosion and weathering of mountains and the particles is transported and deposited in the sedimentary basin , then the sediment particles is cemented over hundreds of years to form layers . This sediments are deposited horizontally by gravity . read more

Rock layers are also called strata (the plural form of the Latin word stratum), and stratigraphy is the science of strata. Stratigraphy deals with all the characteristics of layered rocks; it includes the study of how these rocks relate to time. read more