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.
All petrified wood has some value. The word, tÐ¾ petrify, literally means, âturn tÐ¾ stone.â Petrified wood, then, iÑ wood thÐ°t hÐ°Ñ turnÐµd tÐ¾ stone. The English word iÑ similar tÐ¾ thÐµ Greek (piedra) Ð°nd Latin (pietra) words fÐ¾r stone.he word, tÐ¾ petrify, literally means, âturn tÐ¾ stone.â Petrified wood, then, iÑ wood thÐ°t hÐ°Ñ turnÐµd tÐ¾ stone. The English word iÑ similar tÐ¾ thÐµ Greek (piedra) Ð°nd Latin (pietra) words fÐ¾r stone.