Related: Massive tectonic collision causing Himalayas to grow may also be splitting Tibet apart The Rainbow Mountains are made of sandstone and siltstone ... other trace minerals in the ...

The Rainbow Mountains are made of sandstone and siltstone — sedimentary rocks ... The colorful bands are the result of iron and other trace minerals in the stone. Each band has a different ...

The discovery of the mineral-filled veins within Yellowknife ... Other nearby rocks are siltstone, with grains finer than powdered sugar. These are quite different from the pebbles and ...

Minerals that form under surface conditions ... Erosion removed the softer mudstone and siltstone, leaving behind harder limestone and dolomite. Image credit & read more: Earth Observatory.