Mouth ulcers: Symptoms, treatment and prevention. Mouth ulcers are sores that appear in the mouth, often on the inside of the cheeks. Mouth ulcers, also known as apthous ulcers, can be painful when eating, drinking or brushing teeth.
Fossils are generally found in sedimentary rock. This occurs because the remains of plants and animals tend to accumulate with the inorganic debris that form such rock. In rare instances, fossils can form in igneous rock, as when volcanic ash or lava congeals around a leaf or insect wing, or fills a footprint.xposed rock is the collector's fruitful ground. Many interesting minerals and fossils can be found on weathered slopes, riverbanks, and cliff faces. Human-made excavations such as road cuts and construction or quarry sites can be excellent sites for mineral hunting.
By Andrew Alden. Fossils are precious gifts from the geologic past: signs and remains of ancient living things preserved in the Earth's crust. The word has a Latin origin, from fossilis meaning dug up, and that remains the key attribute of what we label as fossils.hey are exceptionally rare, but trace fossils have special value because they are remains of an organism's behavior. Finally there are chemical fossils or chemofossils, remains that consist of mere organic compounds or proteins found in a body of rock.