doug culver

United States

Joined: 09/10/2008

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doug culver's PowerPoint Presentations

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doug315 uploaded a new presentation "Obsidians Chemical Makeup"

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doug315 uploaded a new presentation "Obsidian Powerpoint"

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Obsidian Powerpoint

How we use obsidian in America, past and present.

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doug315 uploaded a new presentation "Obsidian Powerpoint"

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Obsidian Powerpoint

A powerpoint about how we use obsidian, who used obsidian in america, and why we used obsidian.

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