Wednesday Wisdom- Did you know? 🏔️
The Three Sisters are volcanic peaks that form a complex volcano in the U.S. state of Oregon. They are part of the Cascade Volcanic Arc, a segment of the Cascade Range in western North America extending from southern British Columbia through Washington and Oregon to Northern California.
Each more than 10,000 feet (3,000 m) in elevation, they are the third-, fourth- and fifth-highest peaks in Oregon. Located in the Three Sisters Wilderness at the boundary of Lane and Deschutes counties and the Willamette and Deschutes national forests, they are about 10 miles (16 km) south of the nearest town, Sisters.
Diverse species of flora and fauna inhabit the area, which is subject to frequent snowfall, occasional rain, and extreme temperature variation between seasons. The mountains, particularly South Sister, are popular destinations for climbing and scrambling. Although they are often grouped together as one unit, the three mountains have their own individual geology and eruptive history.
North Sister, also known as "Faith", is the oldest and most highly eroded of the three, with zigzagging rock pinnacles between glaciers. It is a shield volcano that overlays a more ancient shield volcano named Little Brother. Faith is 5 miles (8 km) wide, and its summit elevation is 10,090 feet.
Middle Sister, also known as "Hope", is a basaltic stratovolcano that has also erupted more-viscous andesite, dacite, and rhyodacite. Hope is the smallest and least studied of the three.
South Sister, also known as "Charity", is the tallest volcano of the trio, standing at 10,363 feet (3,159 m). The eruptive products range from basaltic andesite to rhyolite and rhyodacite.
The Three Sisters have about 130 snowfields and glaciers ranging in altitude from 6,742 to 10,308 feet (2,055 to 3,142 m) with a cumulative surface area of about 2,500 acres.
#wednesdaywisdom #sistersoregon #didyouknow #localhistory#trylocalfirst #mackenziecreeksisters #history