Volcanic ash deposits are fine particles ejected during a volcanic eruption. These tiny fragments, often less than 2 millimeters in diameter, are formed when magma explodes and cools rapidly. The ash can spread over large areas, affecting landscapes, air quality, and even climate. When volcanic ash settles, it can create layers of sediment that may be studied by geologists. These deposits can provide valuable information about past eruptions and the history of a volcano, such as Mount St. Helens or Kilauea. Over time, volcanic ash can also contribute to soil fertility, benefiting agriculture in some regions.