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.
The Rock &Gem magazine, August 2010 issue, had an article about collecting at the DoBell Ranch which was in the Holbrook area. We drove east from Holbrook to the northern entrance to the Petrified Forest National Park. At the entrance I was asked by the attendant if I had any petrified wood.he original wood had been buried in the long ago past and the wood was replaced by silica with trace minerals. Those trace minerals produced the rainbow of colors that are displayed in the petrified wood. It is amazing to look at the end of a petrified log two foot in diameter and view the various color showing.