Author's Entries

• Cascade Mountain Range in Oregon

  The Cascade mountain system extends from northern California to central British Columbia. In Oregon, it comprises the Cascade Range, which is 260 miles long and, at greatest breadth, 90 miles wide (fig. 1). Oregon’s Cascade Range covers roughly 17,000 square miles, or about 17 percent of the state, an …

  Oregon Encyclopedia

• Crack in the Ground

  Crack in the Ground is just that, a gaping fracture of tectonic origin in the volcanic terrain of northern Lake County (pasting the coordinate pair 43.3325, -120.6711 in a mobile device map application will allow you to fly there). Long known as “the Crack” to local residents, it is located …

  Oregon Encyclopedia

• Diamond Craters

  Diamond Craters is a geologically youthful lava field 52 road miles south-southeast of Burns in southeastern Oregon. The lava field, which encompasses 27 square miles, comprises chiefly pahoehoe (PAH-hōey-hōey), the smooth, ropy-topped lava best known from Hawaiian flows (the other common lava type, rough 'a'a full of clinkers, is sparse). …

  Oregon Encyclopedia

• Mount Thielsen

  With its summit spire towering a few hundred feet above less precipitous flanks, Mount Thielsen reigns over the High Cascades along the 38-mile stretch from Crater Lake to Diamond Peak. Extinct now, the mountain was an active volcano 300,000 years ago. The seventh highest mountain in the Oregon Cascade Range, …

  Oregon Encyclopedia