Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law ...

These are formed when either igneous or sedimentary rocks are changed. Heat and/or pressure will cause the elements in the original rock to react and re-form. Metamorphic rocks are highly ...

Igneous rocks — which form as magma solidifies either deep within Earth or at the surface after a volcanic eruption, for example — contain a limited number of minerals that crystallize ...

Snowflake obsidian is a form of volcanic glass that features ... geological forces that create the material. Like other igneous rocks, the glossy glass originates from molten rock that has been ...

who currently holds a £1-million project to investigate how rare earth element deposits form, research that could help guide efforts to pinpoint new, economically viable sources. Rare earth deposits ...