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Statements

Subject Item
dbr:Bishop's_Frome_Limestone
rdf:type
dbo:Organisation
rdfs:label
Bishop's Frome Limestone
rdfs:comment
The Bishop's Frome Limestone (or Bishops Frome Limestone) is a rock unit within the Raglan Mudstone Formation of the Old Red Sandstone occurring in the border region between England and South Wales. This limestone is a calcrete, that is to say it originated as a soil during a break in deposition rather than being an original marine deposit. It is perhaps the most significant of all of the calcretes which occur within the uppermost Silurian and lower Devonian sequence of rocks which constitute the Old Red Sandstone of the Anglo-Welsh Basin. It defines the boundary within the basin between the Silurian and the Devonian periods. The rock was formerly known as the Psammosteus Limestone after a characteristic fossil fish recorded from it; Psammosteus anglicus. The fossil remains were subsequent
dcterms:subject
dbc:Geology_of_the_United_Kingdom
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27653700
dbo:wikiPageRevisionID
1091413697
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dbr:Silurian dbr:Bishop's_Frome dbr:Devonian dbr:Geological_unit dbc:Geology_of_the_United_Kingdom dbr:Calcrete dbr:Wales dbr:Old_Red_Sandstone dbr:England dbr:Herefordshire
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dbo:abstract
The Bishop's Frome Limestone (or Bishops Frome Limestone) is a rock unit within the Raglan Mudstone Formation of the Old Red Sandstone occurring in the border region between England and South Wales. This limestone is a calcrete, that is to say it originated as a soil during a break in deposition rather than being an original marine deposit. It is perhaps the most significant of all of the calcretes which occur within the uppermost Silurian and lower Devonian sequence of rocks which constitute the Old Red Sandstone of the Anglo-Welsh Basin. It defines the boundary within the basin between the Silurian and the Devonian periods. The rock was formerly known as the Psammosteus Limestone after a characteristic fossil fish recorded from it; Psammosteus anglicus. The fossil remains were subsequently shown to have been wrongly identified and belong in fact to Traquairaspis symondsi. Its modern name derives from the Herefordshire village of Bishop's Frome. Its thickness is variable ranging from 2m up to 8m.
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wikipedia-en:Bishop's_Frome_Limestone?oldid=1091413697&ns=0
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1539
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wikipedia-en:Bishop's_Frome_Limestone