Silica pseudomorphs from the Bembridge Limestone (Upper Eocene) of the Isle of Wight, Southern England and their palaeoclimatic significance

Silica pseudomorphs from localised silcrete developments in the Bembridge Limestone (Late Eocene) of the Isle of Wight, England are described. These are thought to have formed after lenticular gypsum, whilst the presence of length slow chalcedony confirms the former presence of evaporitic conditions...

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Published inPalaeogeography, palaeoclimatology, palaeoecology Vol. 69; no. 3-4; pp. 233 - 240
Main Author Daley, Brian
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 1989
Elsevier Science
Subjects
Earth sciences
Earth, ocean, space
Exact sciences and technology
Freshwater
Petrology of sedimentary rocks except quaternary rocks
Sedimentary rocks
Upper Eocene
Paleogene
Chert
Crystal form
Pseudomorphism
Arid environment
Europe
Tertiary
England
Great britain
United Kingdom
Silica
Chemically precipitated rocks
Isle of Wight
Sedimentary rocks
Evaporites
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ISSN0031-0182
1872-616X
DOI10.1016/0031-0182(89)90166-1

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Summary:Silica pseudomorphs from localised silcrete developments in the Bembridge Limestone (Late Eocene) of the Isle of Wight, England are described. These are thought to have formed after lenticular gypsum, whilst the presence of length slow chalcedony confirms the former presence of evaporitic conditions. A pedogenic origin is suggested which, with the development of contemporaneous calcrete horizons, indicates that southern Britain was subject to climatically dry phases towards the end of the Eocene, and was not continually humid tropical to sub-tropical as has hitherto been inferred.
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ISSN:0031-0182
1872-616X
DOI:10.1016/0031-0182(89)90166-1