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 ...

The gemstones are an important economic resource in Uruguay, home to the Los Catalanes mining district–a deposit so significant it has been recognized as one of the “First 1000 IUGS Geological ...

An igneous rock has come to be regarded, more constantly than before, not merely as a mineral-aggregate, but as-the product of consolidation of a molten rock-magma; and consideration has been ...