Subject ASC00012ee

The Quarterly journal of the Geological Society of London.
v.67 (1911), Page 180 (1845)
Smithsonian Libraries
BHL Page 39749006

Keywords

volcanic conglomerate lava tuff stone shales quarzite red clay dolerite skomer series Lingula Basalt pillow-lava Shale rocks sediment llandovery.llandovery rocks age pre-upper Llandovery shales quartzites volcanic rocks jeffry's haven antil BAY Llandovery geology volcano Skomer series quartzite Upper Llandovery shales Anvil Bay Jeffry´s Haven Proetus Stropheodonta Lingula #geology

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