It contains minerals such as pyroxene, amphibole, feldspar and 63-68 percent silica. The eruption temperature for dacitic lava is 1,500 to 1,800 degrees Fahrenheit. Dacitic to rhyolitic lava is so dangerous because it contains a high amount of crystals. Mt. Vesuvius erupts according to the Plinian model of eruption.
Nightmares-whether they are just dreams or a sleep disorder-may disrupt normal sleep-wake cycle and create a perception of inadequate sleep or insomnia. There are a lot factors that may trigger insomnia or prevent it from resolving quickly (like temporary jet leg insomnia).ightmares usually occur during REM or dream sleep whereas night terrors usually occur during deeper stages of sleep and may be associated with screaming. Except for the connections noted above there is generally no association between nightmares and night terrors and insomnia.
In adults, about 50% report experiencing nightmares occasionally and of these, they occur more often in women than men. There are certain factors that contribute to frightening dreams occurring in adults: 1. Certain Medications and illnesses, especially fever, can cause bad dreams.2.Stress and anxiety in adults is the main reason that causes bad dreams. If there are some stressful events or huge changes in your life this can definitely lead to frightening dreams.reatment can be sought for these forms of dreams as they are usually more disturbing and persistent in nature. Chase dreams are the most common form of frightening dreams. However drowning, disasters both natural and man-made, falling or anything fearful can also be the theme of a bad dream.