Watson, N. (2019). THE BARBICAN SITE, GLOUCESTER: GEOARCHAEOLOGICAL BOREHOLE SURVEY. ARCA. https://doi.org/10.5284/1097354. Cite this using datacite

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Title:		 THE BARBICAN SITE, GLOUCESTER: GEOARCHAEOLOGICAL BOREHOLE SURVEY
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Series:		 ARCA unpublished report series
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arca1-505039_187436.pdf (894 kB) : Download
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https://doi.org/10.5284/1097354
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Publication Type:		 Report (in Series)
Abstract
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Abstract:		 Borehole survey In March 2019, at the request of Cotswold Archaeology Ltd, ARCA carried out a borehole survey at the Barbican site in Gloucester. Four boreholes were drilled and the following stratigraphic units were identified from youngest to oldest: • Archaeological strata composing cultural diamicts dated to the Victorian period, • Fluvially reworked Cheltenham Sand and Gravel, • Power House Member gravels and • Undifferentiated Blue Lias and Charmouth Mudstone Formations (Lias Group) bedrock. The Lias Group bedrock sub-crops between 5.91m OD in BH4 and 7.60m OD in BH2. A thin deposit of quarzitic gravels pertaining to the Power House Member unconformably overly the bedrock in BH1. This deposit is succeeded by fluvially reworked Cheltenham Sand and Gravel, which also overlies the bedrock in BH2 and BH3. Dark coloured cultural diamicts containing Victorian ceramic building material (cbm) are found in all the boreholes and truncate the gravels and sands. They attain a thickness of between 5.75m and 3.50m in BH4 and BH1, respectively. A humic deposit containing both Roman sherds and Victorian cbm was found in BH3 overlying sand and may represent the base of the Castle Outer Ditch.
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Author:		 Nick Watson
Publisher
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Publisher:		 ARCA
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Year of Publication:		 2019
Locations
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Locations:
County: Gloucestershire
District: Gloucester
Country: England
Parish: Gloucester, unparished area
Grid Reference: 382882, 218507 (Easting, Northing)
Subjects / Periods
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Subjects / Periods:
BOREHOLE SURVEY (Event)
ALLUVIUM (Object England)
ROMAN ALLUVIUM (Tag)
ROMAN (Historic England Periods)
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OASIS Id: arca1-505039
Report id: 1819-15
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Created Date:		 18 Jul 2022