What are bubbling leaves in molten rocks?

Bubbling leaves in molten rocks refer to the formation of gas bubbles within magma or molten rock as it cools and solidifies. These bubbles occur when gases, such as water vapor or carbon dioxide, are released from the magma due to pressure changes or cooling. As the magma rises to the surface, the reduction in pressure allows these gases to escape, creating cavities or vesicles in the solidified rock. This phenomenon is often observed in volcanic rocks like pumice and scoria, which can have a lightweight, porous texture due to the trapped gas bubbles.