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 is a globally significant exposure of fossils from the Triassic Period more than 200 million years ago. The paleontological and stratigraphic information exposed on park land is an invaluable source for the study of these ancient organisms and their environment.he most fertile soils within Petrified Forest National Park are generally found in the rolling grasslands, which are often located between mesas and badlands, as well as on a few of the mesa tops. These soils are composed of alluvial and wind-blown sands, making the soils quite permeable.