Abstract
Fossil hydrothermal chimneys were first discovered at Silvermines1, Ireland. Subsequent discoveries of fossils associated with mounds and chimneys in sulphide deposits within the ophiolite complexes of Cyprus2 and Oman3 prove that life forms similar to those colonising active vents on the East Pacific Rise4–7 were extant 100 Myr ago around ridge crest hot springs. Here I report the discovery of 350-Myr-old worm-like fossils recovered from pyrite chimneys associated with sedimentary-exhalative mineralization at Tynagh, Ireland. This find suggests that even older examples of life existing at seafloor hot springs may be awaiting discovery.
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Banks, D. A fossil hydrothermal worm assemblage from the Tynagh lead–zinc deposit in Ireland. Nature 313, 128–131 (1985). https://doi.org/10.1038/313128a0
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DOI: https://doi.org/10.1038/313128a0
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