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.
How does the movement of tectonic plates occur? The layer of the Earth called the mantle is continuously circulating like rice would in boiling water. This movement under the crust cause the plates to shift moving the plate â¦ s to create mountains, valleys, earthquakes, and tsunamis..