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 type of polysaccharide plant fiber. Polysaccharide fiber is a carbohydrate composed of linked sugar molecules, however, humans lack the enzyme necessary to break cellulose down into component sugars, allowing your body to absorb it.iber can be either soluble or insoluble. The form of cellulose used in foods is soluble fiber. It is important to eat other food sources containing insoluble fiber, such as wheat bran, vegetables and whole grain, to gain the maximum contribution of fiber to health.