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.[1] Its modern name derives from the Herefordshire village of Bishop's Frome. Its thickness is variable ranging from 2m up to 8m.[2]
Referencesedit
^Toghill, P. 2006 Geology of Shropshire (2nd edn) Swan Hill Press, Marlborough, Wilts ISBN1-86126-803-3
^"BGS Lexicon of Named Rock Units - Result Details".
This article about a specific United Kingdom geological feature is a stub. You can help Wikipedia by expanding it.
bishop, frome, limestone, bishops, frome, limestone, rock, unit, within, raglan, mudstone, formation, sandstone, occurring, border, region, between, england, south, wales, this, limestone, calcrete, that, originated, soil, during, break, deposition, rather, th. 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 1 Its modern name derives from the Herefordshire village of Bishop s Frome Its thickness is variable ranging from 2m up to 8m 2 References edit Toghill P 2006 Geology of Shropshire 2nd edn Swan Hill Press Marlborough Wilts ISBN 1 86126 803 3 BGS Lexicon of Named Rock Units Result Details nbsp This article about a specific United Kingdom geological feature is a stub You can help Wikipedia by expanding it vte nbsp This article about a specific mineral or mineraloid is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Bishop 27s Frome Limestone amp oldid 1091413697, wikipedia, wiki, book, books, library,
