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Statements

Subject Item
dbr:Foundered_strata
rdfs:label
Foundered strata
rdfs:comment
Foundered strata is a term used by the British Geological Survey in its maps and geological memoirs, and indeed by other authors, to describe rock strata which have collapsed due, for example, to the dissolution of underlying strata. Foundered strata may retain original bedding more or less intact or they may assume a chaotic structure in the process of collapse or some intermediate state of disruption.
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dbc:Structural_geology dbc:Stratigraphy dbc:Geology_of_the_United_Kingdom
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25946936
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814415943
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dbc:Structural_geology dbr:Brecon_Beacons_National_Park dbr:Rock_strata dbc:Stratigraphy dbr:Carboniferous_Limestone dbc:Geology_of_the_United_Kingdom dbr:Bedding dbr:Dissolution_(chemistry) dbr:Marros_Group dbr:Millstone_Grit dbr:Wales dbr:British_Geological_Survey
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Foundered strata is a term used by the British Geological Survey in its maps and geological memoirs, and indeed by other authors, to describe rock strata which have collapsed due, for example, to the dissolution of underlying strata. Foundered strata may retain original bedding more or less intact or they may assume a chaotic structure in the process of collapse or some intermediate state of disruption. Examples of foundered strata are found along the northern margin of the outcrop of the Twrch Sandstone (the former Basal Grit of the Millstone Grit) in the Brecon Beacons National Park of South Wales. The immediately underlying Carboniferous Limestone has dissolved away in numerous locations such as at Pwll Byfre and resulted in the wholesale collapse of the sandstone beds above it. It is thought that the sandstone has been let down several hundred feet in places due to the removal by solution of limestone strata.
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