what is the special feature of sedimentary rock
Answers
Rocks roll down , hit each other and are broken down into small fragments are called sediment. When these sediments are transported and deposited by wind, water etc. These loose the sediments are compressed and hardened to form layer of rocks are called sedimentary rocks. These rocks may contain fossil of plants and animals.
Sedimentary rocks can be change into metamorphic rocks.
Sedimentary rocks can be categorized into three groups based on sediment type. Most sedimentary rocks are formed by the lithification of weathered rock debris that has been physically transported and deposited. During the transport process, the particles that make up these rocks often become rounded due to abrasion or can become highly sorted. Examples of this type of sedimentary rock include conglomerate and sandstone. Scientists sometimes call this general group of sedimentary rocks clastic. The remaining types of sedimentary rocks are created either from chemical precipitation and crystallization, or by the lithification of once living organic matter. We identify these sedimentary rocks as being non-clastic.