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 wood can be found on every continent with trees, or every continent but Antarctica. Some places petrified wood is commonly found are: USA, Argentina, Brazil, China, Indonesia, UK, Egypt, New Zealand, Australia, and Ukraine.etrified wood can be found in many different colors. What color the stones will be is dependent upon the chemicals in the soil. Petrified wood is nearly all quartz crystals, but quartz has almost no color. It can be combined with other elements to add color to the petrified wood. If you add carbon, the stone is black.