Assertion: obsidian's water content | /r/HasProperty | 0.3 wt %
Facets:
Source sentences:
text: The average water content of obsidian is (0.3 wt %) where as crystalline rhyolite is <2.0 wt % water (Bakken Barbara., 1977).
text: The average water content of obsidian is (0.3 wt %) where as crystalline rhyolite is <2.0 wt % water (Bakken Barbara., 1977).