Synopsis A deep water Periodon—Prioniodus—Protopanderodus assemblage has been isolated from red cherts and mudstones in the Hawkwood Burn, a tributary of the Wandel Burn. Constraints provided by associated graptolites and the absence of Pygodus and Arenig taxa known to occur in the Southern Uplands suggest this part of the sequence is Llanvirn in age.
No takes yet. Share an insight, caveat, or question.
Armstrong et al. (1990) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: