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Ludlow

Shropshire, England

The Ludlow Anticline

In 1832 Dr Thomas Lloyd, the Ludlow doctor and amateur geologist, met Roderick Murchison at Ludford Corner to study the rocks exposed along the River Teme and on Whitcliffe, advancing Murchison's theory for a Silurian System that he was to publish in 1839.

LudlowImmediately above the topmost layer of the marine rock sequence forming Murchison's Silurian period was a thin layer of dark sand containing numerous remains of early fish, especially their scales, along with plant debris, spores and microscopic mites. In contrast to the underlying sediments of the Ludlow Series which were deposited in a shallow warm sea some 400 million years ago, the Ludlow Bone Bed represents terrestrial (land) conditions and thus a fundamental change in the landscape.

LudlowAt the time, this was believed to be the earliest occurrence of life on land. Murchison thus took the Ludlow Bone Bed as the base of his Devonian Period, although over a century later this boundary was to be moved a little higher, the overlying rocks being ascribed to the Pridoli.

The science of geology has taken a number of local names from these studies and now applies them worldwide, in recognition of the importance of this area to scientific understanding, for example Ludlow Series and Whitcliffe Formation.

Ludlow

The site is now an SSSI (Site of Special Scientific Interest) and still attracts international studies. The geological period of the Ludlow epoch is named after the town.

Text: Wikipedia

Nominated by: Geraint Owen @gerainthowen

100 Great Geosites

Related Links

Images (top to bottom): 

  • The Ludlow Anticline, which embraces the Ludlow sequence from the Bone Bed in town to the Bringewood Beds at the top of the wooded ridge in the centre © The Shropshire Geological Society
  • Fossil ripple marks, rock in Ludlow Library © Rept0n1x (Source Wikimedia Commons) Creative Commons Attribution-Share Alike 3.0 Unported
  • Fish Bones from the Ludlow Bone Bed © Notafly (Source Wikimedia Commons) Creative Commons Attribution-Share Alike 3.0 Unported
  • Upper Silurian rocks at Ludford Corner © Eirian Evans (Source Geograph.org.uk) Creative Commons Attribution-ShareAlike 2.0 license.
Earth Science Week 2017

Earth Science Week
October 7-15
Theme: 'Our Restless Earth'