Slow Heart Beat (Bradycardia) An abnormally slow sinus heart rate is called the âsick sinus syndromeâ and, if severe, results in symptoms of fatigue. In some such cases a permanent pacemaker is needed to be implanted to generate a normal heart rate. Many people with sick sinus syndrome also develop atrial fibrillation.
Petrified wood (from the Greek root petro meaning rock or stone; literally wood turned into stone) is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization.lements such as manganese, iron, and copper in the water/mud during the petrification process give petrified wood a variety of color ranges. Pure quartz crystals are colorless, but when contaminants are added to the process the crystals take on a yellow, red, or other tint.
Petrified Forest is primarily a geological park. The stunning vistas and barren âbadlandsâ of the park are a result of the interaction between geology and climate. The paleontological resources, which the park was initially created to protect, are exposes from the substrate by rain-and wind-induced erosion in the park.homas, Petrified Forest National Park, personal communication, 2000). The well house is located on the north bank of the river, in clear sight of the bridge. Numerous water quality samples from the well show a consistent concentration of total dissolved solids around 950 mg/l.