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 Forest National Park. Most of the Petrified Forest National Park's petrified wood comes from tall conifers. These ancient trees grew more than 200 million years ago along waterways, where periodic flooding uprooted trees.ocated in the south are the major concentrations of the famous colorful petrified wood; in the north rise the colorful banded badlands of the Painted Desert. Giant fossilized logs, many of them fractured into cord-wood-size segments, lie scattered throughout, like headstones bearing a deceased's likeness.