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 is actually stone that looks exactly like wood. Petrified wood is actually stone that looks exactly like wood. The detail in the stones is amazing-it looks just like wood but is much stronger and heavier. You can even see the tree rings.Petrified wood literally means wood turned into stone.The word petrify comes from the Greek word petro or rock - Petrify means to change organic matter into a stony concretion by encrusting or replacing its original substance with a calcareous, siliceous, or other mineral deposits.ou can even see the tree rings. Petrified wood literally means wood turned into stone. The word petrify comes from the Greek word petro or rock - Petrify means to change organic matter into a stony concretion by encrusting or replacing its original substance with a calcareous, siliceous, or other mineral deposits.
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.