To answer these questions, it is easiest to start with the amount of gold that humans have mined to date. The U.S. Geological ...

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to [email protected]. Why don’t rocks burn? – Luke, age 4, New Market, ...

Pumice is an extrusive igneous rock formed when gas is trapped in the cooling lava forming a vesicular texture. The rocks may have deposits of important minerals such as tungsten, tin, chromium ...

Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula of Michigan.

Igneous and metamorphic rocks on Earth's surface inevitably erode and break up as wind and water go to work on them. The fragments are transported and form deposits that solidify into new rocks ...

Sedimentary rock is one of the three main rock groups (along with igneous and metamorphic rocks) and is formed in four main ways: by the deposition of the weathered remains of other rocks (known ...

Igneous rock is formed by the cooling of molten rock, either at the surface (lava), or underground (as granite or other similar rocks). The heat of molten rock usually incinerates organisms rather ...

The surprising discovery of volcanic rocks by NASA's Perseverance rover in Jezero Crater could unlock Mars' climate history and reveal when the Red Planet was wet and potentially habitable.

Here's what to know about the rock that is found in the Upper Peninsula along Lake Superior: What is a Yooperlite? Yooperlites are a variety of sodalite-rich syenite found in the Upper Peninsula ...