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 petrified forest are paleontology sites where there are fossilized trees from past geological eras. Patagonia is one of the richest areas in the world on this kind of sites, with the Petrified Forest Natural Monument, in the Santa Cruz province and the Sarmiento Petrified Forest in Chubut, as main exponents.The origin of these petrified forest comes from the Late Jurassic period, approximately 150 million years ago.atagonia is one of the richest areas in the world on this kind of sites, with the Petrified Forest Natural Monument, in the Santa Cruz province and the Sarmiento Petrified Forest in Chubut, as main exponents. The origin of these petrified forest comes from the Late Jurassic period, approximately 150 million years ago.