Channels and minerals
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Channels and minerals
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Time to descend into and out of one of the classic components of this frontier landscape - one of the "gaps". You have already experienced a few and today there will be a few more. But your legs need a break so we are going to deviate south of the Wall too. To see a ditch, then go find about two mineral resources that were used extensively by the Romans - coal and iron - but what do we know about them.
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