eroded volcanic lava, shattered into the sea making sand. basalt with gas creates fountains of lava, steep pile of cinders and bombs, small half mile across, stage 1 capable of 1 week long eruption, stage 2 gas runs out, lava flows out of base. [no gas]. examples mammoth & mono lake.
The most common causes of rib cage pain are a pulled muscle or bruised ribs. Other causes of rib cage pain are: 1  broken ribs. 2  injuries to the chest. 3  rib fracture. 4  diseases that affect the bones, such as osteoporosis. 5  inflamed lining of the lungs. 6  muscle spasms. 7  inflamed rib cartilage.
The sharp pain comes from the nerve being pinched, but the pain can travel around your rib cage or pierce straight through your rib cage and out your breastbone. When the nerves are pinched on the left side of your spine, they can simulate a heart attack because the pain travels around the ribs or through the chest on the left side. Sometimes the pain can last for days if the nerve is being pinched hard enough.