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.
However, petrified wood is a very nice find for any rock hound! Well, petrified wood is wood that has turned to stone. The wood does this through a process that is known as per mineralization. This is when the organic materials in the wood have been replaced with minerals, such as quartz.etrified is a unique type of fossil, because it is an actual 3D dimensional representation of the tree. The wood is petrified when wood is buried underground and suffers a loss of oxygen. Wood usually takes less than a hundred years to petrify, and there are entire woods that are made up of petrified wood.