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About: Ludfordian     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : geo:SpatialThing, within Data Space : dbpedia.org associated with source document(s)

Type: geo:SpatialThing New Facet based on Instances of this Class

In the geologic timescale, the Ludfordian is the upper of two chronostratigraphic stages within the Ludlow Series. Its age is the late Silurian Period, and within both the Palaeozoic Era and Phanerozoic Eon. The rocks assigned to the Ludfordian date to between 425.6 ± 0.9 Ma and 423.0 ± 2.3 Ma (million years ago). The Ludfordian Stage succeeds the Gorstian Stage and precedes the Pridoli Epoch. It is named for the village of Ludford in Shropshire, England. The GSSP for the Ludfordian is represented as a thin shale seam, coincident with the base of the , overlying the in England.