Station 7 Xenolith/Contact

Xenolith/Contact 

The word Xenolith comes from two Greek words: Xeno, meaning foreign, and lithos, meaning stone. A xenolith is formed when a rock fragment becomes enveloped in magma. The rock fragment is incorporated in the newly formed plutonic rock as the magma cools and crystallizes. Here, the xenolith fragment is biotite schist, enveloped in the Almo pluton. Just below the xenolith, is rock from the Green Creek Complex, giving us another view of thecontact between the older and younger granites.