Progress and problems in the selection of stratotypes for the bases of series in the Ordovician System of the historical type area in the UK

Fortey, R.A.; Bassett, M.G.; Harper, D.A.T.; Hughes, R.A.; Ingham, J.K.; Molyneux, S.G.; Owen, A.W.; Owens, R.M.; Rushton, A.W.A.; Sheldon, P.R.

NORA

Progress and problems in the selection of stratotypes for the bases of series in the Ordovician System of the historical type area in the UK

Fortey, R.A.; Bassett, M.G.; Harper, D.A.T.; Hughes, R.A.; Ingham, J.K.; Molyneux, S.G.; Owen, A.W.; Owens, R.M.; Rushton, A.W.A.; Sheldon, P.R.. 1991 Progress and problems in the selection of stratotypes for the bases of series in the Ordovician System of the historical type area in the UK. In: Barnes, C.R.; Williams, S.H., (eds.) Advances in Ordovician geology. Geological Survey of Canada, 5-25. (Geological Survey of Canada Paper, 90-9).