I think the answer you are looking for is yes :)
Explanation:
Rare property of obsidian that is advantageous to archaeologists is that it occurs in volcanic flows that are remarkably homogeneous in chemical composition within a flow, but preserve elemental signatures that are unique to volcanic centers, and in some cases individual flows.
it was old-school war meets new technology
The railroad decreased transportation time across the United States from about six months to roughly "one week," which was incredibly important in terms of settlement and business in the west. <span><span>
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