Yooperlites can be found as loose pebbles and cobbles along many Lake Superior beaches and even in some inland gravel pits.

Sodalite is a deep blue to blue-violet mineral best known for its use in jewelry, sculpture, and decorative stonework.

Sodalite is a deep blue to blue-violet mineral best known for its use in jewelry, sculpture, and decorative stonework. Sodalite forms in igneous rocks that crystallized from sodium-rich ...

The scientists dated the rocks using zircon, a mineral in gneiss, the GSA said. "Dating zircon grains using ... techniques is now celebrated as the optimal method for determining when igneous ...

Granite and other rocks made from recycled magma Igneous rocks ... that cooled and partially re-melted over and over—the minerals like quartz in granite melt easily, so they liquefy and separate ...

Volcanic blast which sent tourists fleeing was most powerful in four years - Footage shared on social media shows huge clouds ...

The earliest martian minerals, as on Earth, were primary phases from mafic igneous rocks and their ultramafic cumulates. Subsequent primary igneous minerals were associated with products of limited ...

grain size heterogeneity in the observed rock textures makes the small-scale compositions measured by rover instruments unreliable for bulk classification. We avoid these ambiguities by using detrital ...

Accessory minerals are common in igneous rocks of intermediate to felsic composition. Their ability to incorporate a wide range of geochemically important trace elements, as well as their ...

The US trade war with China has a major sticking point: rare earths minerals. Last month, President Donald Trump said the ...