By Chisom Ibemere
Lapilli is a term used for small, rounded volcanic rock fragments. The word “lapilli” comes from the latin word which means “little stones” and has been commonly used in volcanic studies since the 18th century.
Lapilli occurs when volcanic eruptions of molten lava is ejected into the air and solidifies before reaching the ground.
It comes in different fragments ranging from a few millimeters to several centimeters. They are typically found in volcanic regions or areas that have experienced volcanic activity.
Lapilli is studied by geologists and volcanologists who research on volcanic eruptions and their impact on the environment.
Its deposits help determine the type and intensity of volcanic eruptions, as well as their eruption styles and volcanic rock compositions.
Lapilli fragments range from 2 mm to 64 mm in diameter. They have rounded or elongated shapes. It is composed of various volcanic materials, including basalt, andesite, rhyolite, or pumice, depending on the type of volcanic eruption.
Lapilli and other volcanic deposits contribute to our understanding of volcanic activity, hazard assessment, and geothermal exploration.
Volcanic regions that have frequent eruptions may have valuable resources, such as geothermal energy or mineral deposits, but these are not inherent to lapilli specifically.