Category:Obsidian boulder screes

Subcategories

This category has only the following subcategory.

Media in category "Obsidian boulder screes"

The following 2 files are in this category, out of 2 total.

• 
  Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 2 (39852720513).jpg 4,000 × 3,000; 8.24 MB
  
• 
  Columnar-jointed rhyolitic obsidian lava flow (Roaring Mountain Member, Plateau Rhyolite, Upper Pleistocene, ~59 ka; Obsidian Cliff, Yellowstone, Wyoming, USA) 20 (45903075895).jpg 2,999 × 3,200; 5.21 MB