Pretty dramatic growth in the #Delabole Quarry, Cornwall between 1884 & 1905 in these OS maps. #geology #thestoryofslate
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@jvh-vt.bsky.social
@jvh-vt.bsky.socialPretty dramatic growth in the #Delabole Quarry, Cornwall between 1884 & 1905 in these OS maps. #geology #thestoryofslate