Crater Lake Rock Types -

Crater Lake National Park Igneous Rocks: A Geological Marvel

/ December 10, 2024

Crater Lake National Park is renowned for its stunning igneous rock formations, formed through volcanic activity over hundreds of thousands of years. The park’s geology is dominated by andesite, dacite, and basalt, with extensive deposits of pumice and pyroclastics. These rocks tell the story of ...

Crater Lake Mineralogy

Crater Lake Obsidian Rocks: A Geological Marvel

Gideon Lakewood

/ December 10, 2024

Crater Lake obsidian rocks are unique volcanic glass formations found in Crater Lake National Park, Oregon. These rocks, formed from rapidly cooled lava during the Mount Mazama eruption about 7,700 years ago, are characterized by their glassy texture, high silica content, and varied colors. Crater ...