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 virgin wood pulp whose variant forms (cellulose gum, powdered cellulose, microcrystalline cellulose, etc.) are deemed safe for human consumption by the FDA, but the agency sets no limit on the amount that can be used in food products, as it does with other contaminants.ellulose adds fiber to the food, which is good for people who do not get the recommended daily intake of fiber in their diets, Inman said. It also extends the shelf life of processed foods. Plus, cellulose's water-absorbing properties can mimic fat, he said, allowing consumers to reduce their fat intake.