Young, D. (2018). LAND ON THE EASTERN SIDE OF MERCIA ROAD, GLOUCESTER Geoarchaeological Fieldwork Report. University of Reading: Quaternary Scientific (Quest). https://doi.org/10.5284/1076236. Cite this using datacite

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Title:		 LAND ON THE EASTERN SIDE OF MERCIA ROAD, GLOUCESTER Geoarchaeological Fieldwork Report
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Series:		 Quaternary Scientific (Quest) unpublished report series
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quaterna1-310318_1.pdf (1 MB) : Download
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https://doi.org/10.5284/1076236
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Publication Type:		 Report (in Series)
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Abstract:		 A programme of geoarchaeological investigation was undertaken at the Mercia Road site in order (1) to clarify the nature of the sub-surface stratigraphy, and (2) to clarify the nature, depth, extent and possible date of any alluvium and organic/peat deposits. The results of the geoarchaeological investigations indicate that the sediments recorded at the site are similar to those recorded elsewhere in the valley of the estuarine River Severn, where the alluvial deposits of the Wentlooge Formation can be identified. In two of the five boreholes the basal unit was a sandy gravel, considered to represent the Pleistocene gravel that underlies the Holocene alluvial sequence, recorded at 3.31 and 3.71m OD in QBH1 and QBH2 respectively. Overlying the gravel is a predominantly silty or sandy unit, interpreted here as the Lower Wentlooge Formation and most likely comprised of estuarine deposits dated to the Early to Middle Holocene. This unit was recorded at elevations of between ca. 3 and 5m OD. No organic horizons, or indeed organic material, was recorded within this unit. Sample retention was extremely poor in the new geoarchaeological boreholes at levels between ca. 5 and 6.8m OD. The composition of the alluvial sequence at these levels is therefore uncertain, and it is indeed possible that organic units survive here. However, no organic or peaty residue was identified in the sample gouges put down to these depths, and it seems more likely that the sequence here was comprised of extremely soft, waterlogged minerogenic deposits similar to the underlying sandy/silty, or overlying clay-rich, deposits. The uppermost unit in the alluvial sequence was a clay-rich, silty unit interpreted as the Upper Wentlooge Formation, recorded at levels between ca. 6.5 and 8m OD and most likely deposited on the floodplain at a distance from any active channels during the Middle to Late Holocene. Again, no organic horizons or inclusions were recorded within this unit.
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Author:		 Daniel Young ORCID icon
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Publisher:		 Quaternary Scientific (Quest)
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Other Person/Org:		 Historic England (OASIS Reviewer)
Gloucester City Council (OASIS Reviewer)
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Year of Publication:		 2018
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Locations:
Site: Mercia Road
County: Gloucestershire
District: Gloucester
Parish: GLOUCESTER
Country: England
Grid Reference: 383174, 219360 (Easting, Northing)
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OASIS Id: quaterna1-310318
OBIB: Quaternary Scientific (QUEST) Unpublished Report March 2018; Project Number 121/17 ©
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Created Date:		 30 Apr 2020