Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England
Three-dimensional preservation of a non-biomineralized arthropod occurs in carbonate concretions in a volcaniclastic deposit from the Wenlock Series of Herefordshire, England. Specimens are preserved in calcite that co-precipitated with framboids and polyhedra of pyrite. The texture of the calcite i...
| Format: | Journal article |
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| Published: |
Geological Society Publishing House
2000
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| Subjects: |
| _version_ | 1826266676634583040 |
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| collection | OXFORD |
| description | Three-dimensional preservation of a non-biomineralized arthropod occurs in carbonate concretions in a volcaniclastic deposit from the Wenlock Series of Herefordshire, England. Specimens are preserved in calcite that co-precipitated with framboids and polyhedra of pyrite. The texture of the calcite indicates that it is a void infill. It forms a cast of the external surface of the arthropod, having precipitated after decay of even the most recalcitrant biological tissues. Incorporation of the fossils into concretions ensured their long term preservation but was not, at least in most examples, responsible for preventing potential collapse and occlusion of voids in the interval between the decay of tissues and the precipitation of calcite. The precipitation and/or accumulation of clay minerals adjacent to specimens during decay was important in this process, as were possibly the geotechnical properties of the ash itself. Limited dolomitization of the calcite around the edges of the fossils and in the matrix of the concretion occurred at a later stage. |
| first_indexed | 2024-03-06T20:42:34Z |
| format | Journal article |
| id | oxford-uuid:34c1f2f5-e523-4272-b00d-8abc7f809e4f |
| institution | University of Oxford |
| last_indexed | 2024-03-06T20:42:34Z |
| publishDate | 2000 |
| publisher | Geological Society Publishing House |
| record_format | dspace |
| spelling | oxford-uuid:34c1f2f5-e523-4272-b00d-8abc7f809e4f2022-03-26T13:28:01ZThree-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, EnglandJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:34c1f2f5-e523-4272-b00d-8abc7f809e4fEarth sciencesEarth SciencesOxford University Research Archive - ValetGeological Society Publishing House2000Three-dimensional preservation of a non-biomineralized arthropod occurs in carbonate concretions in a volcaniclastic deposit from the Wenlock Series of Herefordshire, England. Specimens are preserved in calcite that co-precipitated with framboids and polyhedra of pyrite. The texture of the calcite indicates that it is a void infill. It forms a cast of the external surface of the arthropod, having precipitated after decay of even the most recalcitrant biological tissues. Incorporation of the fossils into concretions ensured their long term preservation but was not, at least in most examples, responsible for preventing potential collapse and occlusion of voids in the interval between the decay of tissues and the precipitation of calcite. The precipitation and/or accumulation of clay minerals adjacent to specimens during decay was important in this process, as were possibly the geotechnical properties of the ash itself. Limited dolomitization of the calcite around the edges of the fossils and in the matrix of the concretion occurred at a later stage. |
| spellingShingle | Earth sciences Earth Sciences Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England |
| title | Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England |
| title_full | Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England |
| title_fullStr | Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England |
| title_full_unstemmed | Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England |
| title_short | Three-dimensional preservation of a non-biomineralized arthropod in concretions in Silurian volcaniclastic rocks from Herefordshire, England |
| title_sort | three dimensional preservation of a non biomineralized arthropod in concretions in silurian volcaniclastic rocks from herefordshire england |
| topic | Earth sciences Earth Sciences |