Stratovolcanoes sometimes have a crater at the summit that is formed by explosive ejection of material from a central vent. Sometimes the craters have been filled in by lava flows or lava domes, sometimes they are filled with glacial ice, and less commonly they are filled with water.
Podiatric management of those with peripheral vascular disease (poor circulation) should include: * A complete evaluation and assessment of the status of the circulation to the foot and communication to you about the risk that the foot is at for complications developing.
1 Effects upon the liver â symptoms of poor blood circulation in the liver can include lack of appetite or unexplained weight loss, and changes in skin tone.  Effects upon the kidneys â poor circulation to the kidneys are typically the result when there is swelling of the hands, feet and ankles. Other symptoms can include fatigue, altered heart rate and rise in blood pressure.