A Middle Bronze Age Burnt Mound at Greywell Road, Hatch, Basingstoke
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Proc. Hampshire Field Club Archaenl. Soc. 61, 2006, 1-15 (Hampshire Studies 2006) A MIDDLE BRONZE AGE BURNT MOUND AT GREYWELL ROAD, HATCH, BASINGSTOKE By RICHARD ORAM with contributions by LUCY CRAMP, STEVE FORD and FRANCES RAYMOND ABSTRACT was traced at Chineham not far to the north (Moore 2001). Neiu development on a site believed to be on the line Archaeological investigation was carried of a Roman road xuas preceded by a desk-based assess- out by Thames Valley Archaeological Sendees ment and an evaluation. The evaluation did not. Ltd, 24 Jan- 14 Feb 2005. Planning consent convincingly locale the road, but did reveal a deposit had been granted by Basingstoke and Dean of burnt flint that appeared to be a prehistoric burnt Borough Council to develop the site for housing mound. A small excavation tested, the nature of this and commercial use, subject to a condition deposit and determined its context. Although a Roman requiring archaeological work in accordance ditch crossed the site on the projected line of the road, with the Department of the Environment's there xuas no sign, of the road itself Pottery, flint-work Planning Policy Guidance, Archaeology and and radiocarbon dating converged to confirm that Planning (PPG16 1990), and the Borough's the flint iuas the remains of a mound created in the policies on archaeology. A desk-based assess- middle Bronze Age. ment was followed by field evaluation, designed to include trenches intersecting the projected course of the Roman road, but no convincing INTRODUCTION trace of it was discovered. Instead, a spread of burnt flint was revealed, together with Bronze The site (SU 67830 52085) is located on the Age and Roman pottery and prehistoric struck south side of Greywell Road, to the east of the flints. This feature was thought likely to be a hamlet of Hatch, south-east of Old Basing (Fig. prehistoric burnt mound, and its discover)' 1). The development area consisted of disused prompted the excavations reported below. fields on the floor and side of the valley of the The purpose of the excavation was to examine River Lyde, which flows to the north. The land the burnt flint spread and determine whether slopes down gently from south to north from it definitely was a prehistoric burnt mound, or around 76m to 73m above Ordnance Datum. part of the Roman road, and if the former, to The underlying geology is low-level terrace establish whether any trace of the Roman road deposits (valley gravel) in an area largely survived. This involved the excavation of an area dominated by Upper Chalk (BGS 1981) close roughly 30m x 28m, centred on the evaluation to its junction with London Clay. The bedrock trenches (15 and 16) that located the original encountered on site was a complex gravel and deposit. Overburden was removed by a 360°- clay. type machine under archaeological supervision The most notable feature previously known and then all features were hand cleaned and in the vicinity of the site is the projected excavated. Soil samples were taken for environ- course of the Roman road from Silchester mental analysis and to enhance finds recovery. to Chichester which crosses the site NW-SE The site code is GRH03/77, and the archive will (Fig. 1). No physical remains of the road have be deposited at Hampshire County Museum been located in the immediate area but it Service, with accession code A2004.59. 1 2 HAMPSHIRE FIELD CLUB AND ARCHAEOLOGICAL SOCIETY 53000 Civil War Earthworks ^ 52000 •- " 52200 —. 52100 -^ 52000 SU67600 67700 67800 67900 68000 Fig. 1 Location of the site. Based on Ordnance Survey Pathfinder SU 65/75 ORAM: A MIDDLE BRONZE ACE BURNT MOUND AT GREYWEI..L ROAD, HATCH, BASINGSTOKE 3 RESULTS The deposit filled the full extent of the natural hollow (1000) at the eastern end but petered The archaeological deposits uncovered out to the west. The surface of deposit 1003 was comprised ditches of various dates, and a spread level, presumably flattened by later ploughing. of burnt flint which partly occupied a large Its former eastern extent was unclear beyond hollow (Fig. 2). The archaeological deposits the protection afforded by the underlying were buried by 19th-century dump layers up to hollow. 0.5m thick. A small number of isolated features The deposit contained 68 struck flints and and finds from the evaluation, away from the fifteen sherds of early and middle Bronze excavated area, and modern features are not Age pottery with nine small rolled sherds discussed here; details are in the archive. whose date is uncertain (see below). A radiocarbon date was obtained on charcoal The large hollow from slot 103 (179) with a most likely date of 1454-1370 cal BC, i.e. middle Bronze Age The earliest feature on the site was a shallow (Table 4 below). elongated hollow (1000), 9m wide and 30m long tapering to the east and extending beyond Bronze Age ditch the western margins of the site. The hollow was only 0.46m at its deepest point (Fig. 3). It is To the north of the burnt flint deposit was a considered that this is a natural formation and ditch (1001). This was investigated in four slots is likely to be some form of subsidence from (105, 106, 118, 120) and was 1.8m wide and a solution hollow in the underlying chalk. The 0.74m deep. The ditch contained three or four hollow would have acted as a natural trap for fills, typically red-yellow or blue-grey silty clays. discarded material but it is quite clear that the Pottery recovered consisted of just a single burnt flint deposit was deliberately placed. large sherd of a middle Bronze Age bucket urn It is probable that the former extent of the in good condition but there were also 57 struck burnt flint deposit was larger but marginal flints. Although these finds could be residual, areas beyond the limits of the hollow had been the potter)' sherd is in good condition and, removed by later ploughing. with the quantity of flints recovered, suggests The lowest layers of the hollow (e.g., 164: that this ditch is of Bronze Age date. A slot (2) Fig. 3) which were a yellow/brown silty clay excavated in the evaluation trench in an area of with some flint nodules, did not contain complexity, now seems most likely to have been much burnt flint and were probably natural dug through part of ditches 1001 and 1002. Six accumulations. These contained four sherds sherds of Roman pottery (and two flint flakes) of Neolithic pottery, and twelve sherds of produced by this slot are more likely to belong Neolithic to later Bronze Age pottery, along to Roman ditch 1002 which was not recognized with 72 struck flints. at the time of the evaluation. The burnt mound Bronze Age scoops The eastern end of the hollow was occupied by a Three small amorphous pits (114, 115 and dense deposit (e.g., 155: Fig. 3) composed pre- 117), little more than shallow scoops, lay north dominantly of burnt flint in a matrix of brown of ditch 1001, and two more (4, 5) to the south silty clay with some charcoal. Deposit 1003 was of the burnt mound. These contained no an elongated oval on an east-west orientation, datable finds other than a single struck flint 6.5m at its widest and 16.5m long. It was no from 115, and some unidentifiable crumbs of more than 0.26m deep. Usually it consisted potter)' from 4, but 117 included a small dump of a single layer, but was recognizable as two of burnt flint suggesting a relationship with the deposits in places (Fig. 3: 103: 179 and 180). nearby burnt mound. HAMPSHIRE FIELD CLUB AND ARCHAEOLOGICAL SOCIETY 52100 52070 SU67840 Fig. 2 Plan of the excavated area ORAM: A MIDDLE BRONZE AGE BURNT MOUND AT GREYVVELL ROAD, HATCH, BASINGSTOKE SW \ 7__m AOD NE 104 (scale for above section only) 5m 1001 1002 1001 75.21m N w m2m ^^j»<!fte^TOs^~,-C-^- 103 3m Fig. 3 Selected sections Roman ditch FINDS A single ditch (1002) which traversed the site Pottery by Frances Raymond NW-SE was investigated by four slots (111, 113, 109,119) and was typically 1.2m wide and 0.42m Seventy sherds (382g) were recovered during deep. The fills were yellow/brown clayey silts the evaluation and excavation (Table 1). and contained twelve sherds of late Iron Age These are mostly featureless wall fragments or early Roman pottery. The fill also contained in poor condition, representing various residual prehistoric finds (two sherds of Bronze phases of activity from the Neolithic to the Age potter)' and thirteen struck flints). The Roman period. The pottery has been analysed ditch cut both the burnt mound and earlier following the guidelines of the Prehistoric ditch 1001 (Fig. 3). Ceramics Research Group (PCRG 1997). The 6 HAMPSHIRE FIELD CLUB AND ARCHAEOLOGICAL SOCIETY sherds were quantified according to fabric, Late Iron Age form, decoration, surface treatment, colour, FGS/lAn oxidized fabric containing sparse burnt wall thickness, abrasion and size with the aid flint (0.5 to 2.5mm) and grog (0.8 to 1.5mm), of a binocular microscope set to a magnifica- together with common rounded quartz sand tion ofx20. (0.2 to 1.0mm). OS/1 An oxidized fabric containing common organic inclusions (up to 5.0mm long) Fabric Descriptions and moderate rounded quartz sand (0.2 to Unless stated otherwise all of the fabrics are soft 0.5mm). with evenly distributed inclusions and hackly S/3 A black fabric containing common rounded fractures.