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:
Processed grains lose much of their fiber content. Fiber 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.dult males should consume at least 38 grams of fiber daily; adult women should consume at least 25 grams. If you are over 50, you may require less fiber in your diet. Chances are, you do not consume this much fiber on a daily basis. Cellulose is added to foods, in part, to aid in increasing your fiber intake.