GERD signs and symptoms include: 1  A burning sensation in your chest (heartburn), sometimes spreading to your throat, along with a sour taste in your mouth. 2  Chest pain. 3  Difficulty swallowing (dysphagia). 4  Dry cough. 5  Hoarseness or sore throat. 6  Regurgitation of food or sour liquid (acid reflux). 7  Sensation of a lump in your throat.ERD signs and symptoms include: 1  A burning sensation in your chest (heartburn), sometimes spreading to your throat, along with a sour taste in your mouth. 2  Chest pain. 3  Difficulty swallowing (dysphagia). 4  Dry cough. 5  Hoarseness or sore throat. 6  Regurgitation of food or sour liquid (acid reflux). 7  Sensation of a lump in your throat.
A fossil is the remains or traces of a once-living plant or animal that was preserved in rock or other material before the beginning of recorded history. The term also is used to describe the fossil fuels (oil, coal, petroleum, and natural gas) that have been formed from the remains of ancient plants and animals.
Fossils also form from molds and casts. If an organism completely dissolves in sedimentary rock, it can leave an impression of its exterior in the rock, called an external mold. If that mold gets filled with other minerals, it becomes a cast.reezing, drying and encasement, such as in tar or resin, can create whole-body fossils that preserve bodily tissues. These fossils represent the organisms as they were when living, but these types of fossils are very rare.