Carbonaceous type of sedimentary rocks are made from

Carbonaceous sedimentary rocks are made from vegetative matter. Carbonaceous sedimentary rocks are a type of rock that contains high levels of carbon, such as coal, shale, and limestone. These rocks are formed from the accumulation and compaction of organic material, which is primarily composed of vegetative matter, such as dead plants and trees. Over time, as layers of dead vegetation accumulate in swamps and wetlands, they are buried under sediment and rock. As more layers accumulate, the weight of the overlying material compresses and heats the layers beneath, causing the organic material to undergo a process of chemical and physical change called diagenesis. This process results in the formation of coal, shale, and other carbonaceous sedimentary rocks. In contrast, sedimentary rocks that are made from the remains of dead animals, such as limestone or chalk, are not considered to be carbonaceous. These rocks form from the accumulation and compaction of shells, bones, and other calcium-rich material produced by marine organisms.