Image: Obsidian - Igneous Rock
Size of this preview: 799 × 599 pixels. Other resolutions: 320 × 240 pixels | 3,849 × 2,887 pixels.
Original image (3,849 × 2,887 pixels, file size: 2.18 MB, MIME type: image/jpeg)
Description: Glassy igneous rock, obsidian, with conchoidal fracture. Redmond, Oregon.
Title: Obsidian - Igneous Rock
Credit: Own work
Author: B. Domangue
Usage Terms: Creative Commons Attribution-Share Alike 4.0
License: CC BY-SA 4.0
License Link: https://creativecommons.org/licenses/by-sa/4.0
Attribution Required?: Yes
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