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.
Fossils are the preserved remains or traces of animals and plants. They form by a process called fossilization. Fossils are usually found in rock, but they can also be found in mud or gravel. Most have lain buried for millions of years. The word fossil comes from the Latin word fossilis. That means âdug up,â and some fossils are discovered when they are dug out of the ground. However, most fossils are found when the rocks of the landscape are worn away by wind and water, exposing the fossils. In China, dinosaur fossils were once thought to be dragon bones.