@conference { , title = {Ichnology and sedimentology of tephra horizons in the lower old red sandstone (Siluro-Devonian) of southwest Wales}, conference = {Ichnia, 1st International Conference on Ichnology}, publicationstatus = {Unpublished}, url = {https://uwe-repository.worktribe.com/output/1061302}, keyword = {ichnology, sedimentology, tephra horizons, lower old red sandstone, Wales}, year = {2004}, author = {Morrissey, Lance and Marriott, Susan and Williams, B P J and Hillier, R D} }