Rhyolite caldera complexes are the most explosive of Earth's volcanoes but often don't even look like volcanoes. They are usually so explosive when they erupt that they end up collapsing in on themselves rather than building any tall structure (George Walker has termed such structures inverse volcanoes).
A normal serum sodium level is between 135 and 145 milliequivalents per liter. As this value can vary from laboratory to laboratory, it is important to consult with your physician to get a proper assessment.
Your doctor will evaluate your sodium by requesting a blood lab test. Sodium levels should be between 135 to 145 milliequivalents per liter, or mEq/L for short, although your lab may have slightly different values, MedlinePlus reports. A high sodium level indicates too much sodium in your diet, too much fluid loss or some sort of complication.