Visean and Dinantian

According to an earlier blog on the Carboniferous the Dinantian is a series and the Visean a stage. According to the BGS book The Pennines and adjacent areas (p16) the Dinantian is a subsystem and the Visean a series which is divided into stages:

I am more inclined to believe the BGS over Wikipedia!

Whichever is true the geology of the Peak District is often described as Dinantian, Namurian and Westphalian which is a mixture of subsystem and series (on the BGS criteria) with the occasional mention of the Visean. Geologists always seem out to confuse.

 

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