Abdominal pain. Find possible causes of abdominal pain based on specific factors. Check one or more factors on this page that apply to your symptom. Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Magma in Earth's Mantle Forms Deeper Than Once Thought. Study simulating pressures in mantle beneath the ocean floor shows that rocks can melt at depths up to 250 kilometers. When magma reaches Earth's surface and erupts from a volcano, it becomes lava.
The caverns are the largest in the state, with over 2 miles of surveyed passageways ranging in depth from 30 feet to the deepest point of 103 feet. Special tours take you into the historic part of the cave â the portion first discovered and opened decades ago.