Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases). As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases. When lava erupts it is made up of a slush of crystals, liquid, and bubbles. The liquid freezes to form volcanic glass. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium (plus other elements in very small concentrations. Have a look at the background information in Minerals, Magma, and Volcanic Rocks.
The HoverJack has a weight limit of 1200 lbs. When lifting a heavy patient, extra caution must be taken to center him or her properly on the HoverJack. partners
Chaffin and Ayoub's corresponding maximum acceptable weights for knuckle to shoulder height lifts would be 40 pounds acceptable to 90 percent, 55 pounds acceptable to 50 percent, and 69 pounds acceptable to 10 percent of the male workforce. The respective weight limits for women were 23 pounds, 27 pounds, and 31 pounds.