Alum shale

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Alum Shale
Type Geological formation
Primary Shale
Country  England

Alum shale (also known as alum schist and alum slate) is a variety of shale or clay slate (oil shale) containing pyrites. Decomposition of pyrite by weathering forms sulfuric acid, which acts on potash and alumina constituents to form alum, often efflorescences on the rock.

Alum shale contains kerogen originated from algae. At the same time it is rich of aromatic moieties attributed to post-depositional irradiation damage induced by uranium concentration in the shale.[1] Between 1950 and 1989, Sweden used alum shale for the uranium production.[2] Alum shale also contains enhanced levels of radium.[3]



Pterosaurs of the Alum Shale
Taxa Presence Notes Images


  1. P. purdoni[4]
  1. Found near the town of Whitby in Yorkshire, England.[4]


  1. ^ Peters, Kenneth E.; Walters, Clifford C.; Moldowan, J. Michael (2005). The biomarker guide. Cambridge University Press. p. 777. ISBN 978-0-521-83762-0. Retrieved 2009-05-30. 
  2. ^ Dyni, John R. (2006). "Geology and resources of some world oil shale deposits. Scientific Investigations Report 2005–5294" (PDF). United States Department of the Interior, United States Geological Survey. Retrieved 2009-05-30. 
  3. ^ Stranden, E.; Strand, T. (1988). "Radon in an Alum Shale Rich Norwegian Area". Radiation Protection Dosimetry (Oxford University Press) 24 (24): 367–370. Retrieved 2009-05-30. 
  4. ^ a b c Wellnhofer, Peter (1991). "Summary of Lower Jurassic Pterosaurs." The Illustrated Encyclopedia of Pterosaurs. London, UK: Salamander Books Limited. p. 79. ISBN 0-86101-566-5.