Map of SW England (after Moon 2010), showing sample sites for oil residues at Wheal Speed, North Treskerby and South Crofty, and samples used for comparison.

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Presentation transcript:

Map of SW England (after Moon 2010), showing sample sites for oil residues at Wheal Speed, North Treskerby and South Crofty, and samples used for comparison. Map of SW England (after Moon 2010), showing sample sites for oil residues at Wheal Speed, North Treskerby and South Crofty, and samples used for comparison. Oil residues occur close to the margin of granites with Devono-Carboniferous ‘killas’ country rock. BA, Triassic black shale, Blue Anchor; BT, Oligocene lignite, Bovey Tracey; LE, Looe; MP, Mupe Bay; QH, Devonian, Quantock Hills; TD, Treskillard. Mas'ud Baba et al. Petroleum Geoscience 2018;petgeo2018-053 © 2018 The Author(s). Published by The Geological Society of London for GSL and EAGE