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obsidian
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obsidian obsidian boulders obsidian volcanic glass rock textures
See a researcher making an Oldowan flint flake from obsidian through a technique known as knapping
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Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones
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News •

May 3: Wild fish can tell us apart, and more... • May 2, 2025, 11:16 PM ET (CBC)
Albertan obsidian artifacts are the end point of a widespread Indigenous trade network • May 2, 2025, 12:33 AM ET (CBC)

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obsidian
obsidian boulders
obsidian
volcanic glass
rock textures
See a researcher making an Oldowan flint flake from obsidian through a technique known as knapping
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Quiz
Basalt sample returned by Apollo 15, from near a long sinous lunar valley called Hadley Rille. Measured at 3.3 years old.
(Bed) Rocks and (Flint) Stones