A tale of two granites in the Sawtooth Mountains, Idaho: Cretaceous gray rocks vs Eocene pink rocks скачать в хорошем качестве

A tale of two granites in the Sawtooth Mountains, Idaho: Cretaceous gray rocks vs Eocene pink rocks

The Sawtooth Mountains of central Idaho vividly showcase two different granites from two different geologic periods. Head out to these rugged and scenic mountains with geology professor Shawn Willsey as he examines the contact between the ~90 million year old (Cretaceous) gray granodiorite of the Idaho batholith which has been intruded by ~50 million year old (Eocene) pink granite of the Sawtooth pluton, the intrusive equivalent of the Challis volcanics. The area between Alpine Lake and Sawtooth Lake is a great location to observe the textures and interplay between these two ancient magma bodies. Approximate GPS location: 44.18180, -115.06008 I love doing these videos and will continue to do so but if you want to provide support or much appreciated gas money, you can send support via: Venmo @Shawn-Willsey (be sure to put two L's in last name) or PayPal: https://www.paypal.com/donate/?hosted... or a good ol' fashioned check to this address: Shawn Willsey College of Southern Idaho 315 Falls Avenue Twin Falls, ID 83303