Relative dating to determine the age of rocks and fossils. Geologists have established a set of principles that can be applied to sedimentary and volcanic rocks that are exposed at the Earth's surface to determine the relative ages of geological events preserved in the rock record.
In contrast, fibers from natural sources are provided by nature in ready-made form. Natural fibers include the protein fibers such as wool and silk, the cellulose fibers such as cotton and linen, and the mineral fiber asbestos. Plant fibers can be further on classified as:1  Fibre occurring on the seed (raw cotton, java cotton). 2  Phloem fiber (flax, ramie, hemp, jute).n contrast, fibers from natural sources are provided by nature in ready-made form. Natural fibers include the protein fibers such as wool and silk, the cellulose fibers such as cotton and linen, and the mineral fiber asbestos. Plant fibers can be further on classified as:
Cellulose is a nonliving substance that is made by the plant from grape sugar. It is a very complex carbohydrate chemically with the formula (C6H10O5)n Cells walls are variable in size and appearance.Some have walls that are heavily thickened, which are called Sclerenchyma Cells.t is a mixture of resins, gums, hydrocarbons, food and other substances formed in special called or vessels usually in the bark or leaves. Its use by the plant is not clear but may be involved in protection.