This week features another quiz for the very model of a geologic generalist: a dozen questions of rising difficulty and/or trickiness, culminating in a million-dollar poser. Can you measure up? Test your mettle on Geo-Quiz number 5.
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Good quiz! Except for misunderstanding the question about thorium in the crust, I’d be a rich man. Reading too fast, I was thinking “most abundant” as opposed to unusually concentrated. Oh well, maybe next time!