Allen, J. R L. and Haslett, S. K. (2002). Buried salt-marsh edges and tide-level cycles in the mid-Holocene of the Caldicot Level (Gwent), South Wales, UK. Holocene 12 (3). Vol 12(3), pp. 303-324.
 Title The title of the publication or report |
Buried salt-marsh edges and tide-level cycles in the mid-Holocene of the Caldicot Level (Gwent), South Wales, UK | |||
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Issue The name of the volume or issue |
Holocene 12 (3) | |||
Series The series the publication or report is included in |
The Holocene | |||
Volume Volume number and part |
12 (3) | |||
Page Start/End The start and end page numbers. |
303 - 324 | |||
Biblio Note This is a Bibliographic record only. |
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Publication Type The type of publication - report, monograph, journal article or chapter from a book |
Journal | |||
Abstract The abstract describing the content of the publication or report |
Combining stratigraphical, sedimentological and biofacial (foraminifera) approaches, a high-resolution, time-constrained study was made of a mid-Holocene (c. 5800--4900 14C yrs BP) estuarine succession (c. 2 m) continuously exposed for 1.75 km between two major, late-Holocene palaeochannels. The succession displays great lateral variation in bed thickness and facies; bounded by two laterally extensive peats, it consists of silts split by an impersistent, thin peat. A depositional hiatus gradually rises southwestward through the silts from the top of the lower extensive peat to the base of the higher bed, dividing the succession into two depositional sequences. Sequence I registers a rise of tide level lasting several hundred radiocarbon years. It appears to represent an estuarine marsh with a depositional edge which overlooked to the northeast a largely exposed shelf formed by the lower extensive peat. Sequence II arose much more rapidly, during a further tide-level rise that lasted only 100--200 years. A new marsh formed in the northeastern part of the section, but a wide, brackish, rapidly infilling embayment lay between this marsh and the previous one to the southwest. Differential autocompaction strongly influenced the rate of accumulation of both sequences, creating bed thickness variations of twofold or more. The mid-Holocene estuary experienced subtle, local geographical changes in addition to the gross changes indicated by the silt-peat alternation. | |||
Year of Publication The year the book, article or report was published |
2002 | |||
Locations Any locations covered by the publication or report. This is not the place the book or report was published. |
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Source Where the record has come from or which dataset it was orginally included in. |
BIAB
(The British & Irish Archaeological Bibliography (BIAB))
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Relations Other resources which are relevant to this publication or report |
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Created Date The date the record of the pubication was first entered |
01 Aug 2007 |
