a branch of the Indo-European family of languages, including especially Irish, Scottish Gaelic, Welsh, and Breton, which survive now in Ireland, the Scottish Highlands, Wales, and Brittany. adjective. 2. of the Celts or their languages.
Movement of tectonic plates-higher. Volcanoes, mountains and earthquakes occur at the edges of tectonic plates-their creation depends on the direction the plates are moving.
Best Answer: Tectonic plate movement causes earthquakes. Plate movement does not cause volcanoes, instead, ...along the margins between the great tectonic plates that make up the Earth's surface, mantle rock melts into magma in huge volumes, and buoyed by its relatively low density wells up the surface to erupt as volcanoes.