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A palaeomagnetic and mineral magnetic study of the Speeton Shell Bed, North Yorkshire
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SUMMARY
A palaeomagnetic and mineral study of the estuarine sands of the upper exposure of the Speeton Shell Bed (late Pleistocene, pre-Devensian) provides independent evidence that the bed is not
in situ
and has undergone a rotation consistent with the effects of ice push. Variation in magnetic susceptibility also supports suggestions that the upper parts of the Speeton Shell Bed have been weathered. A previously unrecorded shrinkage crack horizon indicates that the depositional history of the Speeton Shell Bed may have been more complex than previously thought.
Geological Society of London
Title: A palaeomagnetic and mineral magnetic study of the Speeton Shell Bed, North Yorkshire
Description:
SUMMARY
A palaeomagnetic and mineral study of the estuarine sands of the upper exposure of the Speeton Shell Bed (late Pleistocene, pre-Devensian) provides independent evidence that the bed is not
in situ
and has undergone a rotation consistent with the effects of ice push.
Variation in magnetic susceptibility also supports suggestions that the upper parts of the Speeton Shell Bed have been weathered.
A previously unrecorded shrinkage crack horizon indicates that the depositional history of the Speeton Shell Bed may have been more complex than previously thought.
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Lithostratigraphy and biostratigraphy of the Hunstanton Formation (Red Chalk, Cretaceous) succession at Speeton, North Yorkshire, England
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SUMMARY
The Hunstanton Formation (Red Chalk), as interpreted here, is 24 m thick at Speeton and is divided into five members (Queen Rocks, Speeton Beck, Dulc...
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Leptopoma
Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and variations in shell form due to geography
Land snails of
Leptopoma
Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and variations in shell form due to geography
Leptopoma
is a species rich genus with approximately 100 species documented according to shell morphology and animal anatomy. Many of the
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Land snails of
Leptopoma
Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and geographical variations in shell form
Land snails of
Leptopoma
Pfeiffer, 1847 in Sabah, Northern Borneo (Caenogastropoda: Cyclophoridae): an analysis of molecular phylogeny and geographical variations in shell form
Leptopoma
is a species rich genus with approximately 100 species documented. Species-level identification in this group has been based on shell morphology and c...
Eccentricity variations trigger “subduction” in Europa’s ice shell
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