Littoral cone

A littoral cone is a special kind of volcanic cone that forms when lava flows meet water. When lava touches water, it can cause steam explosions, which break the lava into small pieces. These pieces pile up and create a cone shape.

These cones usually form on thick, rough lava flows called ʻaʻā. They need really big lava flows to form, so they are not found everywhere. One of the best places to see littoral cones is on the big island of Hawaii, where scientists have studied them. Littoral cones show us how powerful nature can be when fire and water meet.

Description

Littoral cones are special volcanic cones that form when lava flows into water. When lava touches water, steam explosions happen, sending lava pieces into the air. These pieces pile up and form a cone shape on land. They are made from volcanic ash, lava bombs, and small rock fragments.

Littoral cones are not the main openings of a volcano and can look similar to other volcanic features. They often appear as curved shapes next to where the lava entered the water. In places like Hawaiʻi, these cones can be small mounds or larger structures. The size of the lava flow and its speed can change how big the cone becomes.

Examples

Pseudocraters and littoral cones can be seen in many places, such as Iceland, Hawaiʻi, Cerro Azul in the Galápagos Islands, Deception Island, Antarctica, Réunion, and Medicine Lake Volcano in California. Littoral cones form when lava touches water, creating steam explosions that build up fragments into a cone shape.

These cones often disappear quickly because of moving lava or sea erosion. Famous examples include cones made during eruptions at Piton de la Fournaise on Réunion and at Kīlauea and Mauna Loa in Hawaiʻi. Other examples are near Villamil at Sierra Negra in the Galápagos Islands, along the shores of Lake Kivu in East Africa, and at Becharof Lake in Alaska.