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The Longmyndian Supergroup is a 6,000-metre-thick (20,000 ft) sequence of Late Precambrian rocks that outcrop between the and the in the Welsh Borderland Fault System. The supergroup consists of two major geological groups, the Stretton Group and the overlying Wentnor Group. The rocks are a generally regressive sequence from basinal facies to clastic sedimentation. The rocks are thought to be derived from Uriconian mountains that were formed during the southward subduction of an oceanic plate beneath a continental block (ocean closure). The rocks have since been folded due to fault movements and plunge gently to the south.

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  • Longmyndian Supergroup (de)
  • Longmyndian Supergroup (en)
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  • Die Longmyndian Supergroup ist ein rund 6000 Meter mächtiger geologischer Schichtenverband in Shropshire, der während des Ediacariums abgelagert wurde. Er enthält primitive Fossilien, Vorläufer der Ediacara-Fauna. (de)
  • The Longmyndian Supergroup is a 6,000-metre-thick (20,000 ft) sequence of Late Precambrian rocks that outcrop between the and the in the Welsh Borderland Fault System. The supergroup consists of two major geological groups, the Stretton Group and the overlying Wentnor Group. The rocks are a generally regressive sequence from basinal facies to clastic sedimentation. The rocks are thought to be derived from Uriconian mountains that were formed during the southward subduction of an oceanic plate beneath a continental block (ocean closure). The rocks have since been folded due to fault movements and plunge gently to the south. (en)
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  • Longmyndian Supergroup (en)
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  • *Wentor Group *Stretton Group (en)
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  • Ediacaran (en)
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  • Die Longmyndian Supergroup ist ein rund 6000 Meter mächtiger geologischer Schichtenverband in Shropshire, der während des Ediacariums abgelagert wurde. Er enthält primitive Fossilien, Vorläufer der Ediacara-Fauna. (de)
  • The Longmyndian Supergroup is a 6,000-metre-thick (20,000 ft) sequence of Late Precambrian rocks that outcrop between the and the in the Welsh Borderland Fault System. The supergroup consists of two major geological groups, the Stretton Group and the overlying Wentnor Group. The rocks are a generally regressive sequence from basinal facies to clastic sedimentation. The rocks are thought to be derived from Uriconian mountains that were formed during the southward subduction of an oceanic plate beneath a continental block (ocean closure). The rocks have since been folded due to fault movements and plunge gently to the south. The Longmyndian rocks were deposited in northeast–southwest trending faulted rift basins. These were deposited on top of the Uriconian volcaniclastic deposits. Subsequent ocean closure squeezed these rocks together to provide sub-vertical bedding in the synclinal sequence we see in exposed rocks today.As noted below, the deposited rocks of the Longmyndian show a variety of depositional facies that tell a story of ocean closure. The Longmyndian deposits rest upon Uriconian rocks but different sections are exposed exclusively between the Church Stretton Fault and the Pontesford-Linley Lineament. (en)
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