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YHA Portland

A pre development excavation was carried out in the grounds of the Youth Hostel Castletown in 2002 and found evidence of Late Palaeolithic tools . A report was published in the Proceedings of the  Dorset Natural History and Archaeological Society 2004 (125)

The details below are from an edited version of the report prepared for the Association's July 2003 newsletter

1. INTRODUCTION

  The site is situated at SY  68507399  off  Castle Road in Castletown near the northern  end of the Island of Portland and has previously been known as  Hardy House or the MOD Police Station.  An archaeological evaluation of the terrain round the Youth Hostel  was requested by Weymouth and Portland Borough Council as a  condition for granting development permission..  A.P.A. volunteered to do the evaluation in order to help the YHA. The proposed development involves an extension of the existing building to the  rear  (east)  of the building into the present garden  The hostel is immediately adjacent to the  Portland Hospital  in the north.  The  site is situated  on the lower slope of the Verne Hill and the ground of the  hostel’s back garden  rises  quite steeply from approximately 19.86m to 24.54m OD.  The foundation trenches for the development  (as proposed  in 2002) would have to be excavated into this slope.  The grounds of the hospital had been extensively excavated during  WW2 in order to create  underground  facilities for  wounded and sick  MOD personnel. Part of the huge spoil dump involved in this work is  still in the grounds of the hospital,  immediately  adjacent the northern side of the fence between the hospital and the Youth Hostel.  Prior to the commencement of the evaluation work, it was  not known  for certain whether the slope in the grounds of the Youth Hostel was completely natural or was  at least in part due to  soil overspill from the huge soil dump in the hospital ground.  The archaeological field work was carried out in June 2002, by volunteers of the Association for Portland Archaeology.    Part of the brief was to involve residents in the hostel and we had many enthusiastic people participating. We also had volunteers from the local community and for many their first experience of archaeology .

2. OBJECTIVES OF THE  ASSESSMENT

  The assessment and excavation work prior to development was undertaken in order to ascertain  and record  whether this area of the Verne slope contained any archaeological material.  It was also necessary to ascertain whether the slope of the hostel grounds was natural or due to refuse earth discarded here during the digging of the underground hospital. 

3. ARCHAEOLOGICAL AND HISTORICAL BACKGROUND OF  THE SITE

  In the late 20th century when Hardy House was built,  very few  developers kept a record of archaeological remains found during the work.  Vast quantities of Roman and Iron Age material had, however, been found  in most areas of the Verne and all over the slopes (Palmer 1998).  Roman burials have also been found  during the building of the houses on the slopes of the hill  (Palmer, ibid)  immediately  to the south of the Youth Hostel.   During the building of these houses and structures at the top of the Verne,  there was very little  understanding of lithic material and any remains of the Pleistocene period, except amongst people with a specialist  ‘antiquarian’  interest. One such a person was  Captain  George Clifton, the first governor of the Verne citadel, which is situated at the highest point of the Verne hill.  In the course of quarrying operations and excavation work for the ditches of the citadel ’twelve cartloads’ of late Pleistocene mammalia bones were found (Damon, 1884; Palmer, 1998). All these remains were stored in boxes in the passage outside Capt. Clifton’s office but all were later discarded except for one mammoth tooth, now in the Natural History Museum in London.   In 1967 the present author found in the British Museum reserve collections a box  containing 19  chert artefacts and one of flint which had been found in the south ditch, apparently at the same time as the mammalia remains, and were also given to the  Natural History Museum in 1889  by Capt. Clifton  and were transferred to the British.Museum. in 1914  (Palmer,  1968; 1998). These artefacts included 4 tanged points with areas of blunting retouch,  7  convex  end-scrapers on short flakes , one convex end-scraper on a short blade, one oval scraper made from a thick flake and with a scraper angle of about 80o , 1 point (awl?) with extensive  inverse retouch, 1 blade 8 cms long with some fine retouch along both edges, 3 utilised  chert flakes  and one of flint, 1  unretouched waste flake of chert.. All these artefacts were of a Late Palaeolithic aspect  and was characterised by bold retouch, often of a blunting character.  Some  still had  particles of orange coloured loam attached to them.  This has the same appearance as the  loam which is  found at the base of the archaeological deposits at the Culverwell site and Site 1 at the Bill (Palmer, 1999). 

4. METHODOLOGY

  A geophysical survey of the whole ground was carried out and any anomalies recorded. Trench 1 (1m2)  was opened  as an exploratory trench  in a southern part of the garden furthest away from the fence between the hostel and the hospital.  This was excavated in order to ascertain whether any part of the garden could still give an indication  of the original soil profile prior to the 19th/20th century work in the plot of ground or adjacent it.   The main  trench   (T2 measuring 10 x 2m) was opened central to the area of   the   geophysical survey and the   proposed development and cut across the slope of the hill  (Fig. 3).    Four sondages of  .3m width  within this trench was  hand-excavated  into  the natural loam  (Layer 3)  to a depth of about  30cms.  Two smaller trenches (T 3 and  T4,  both  measuring 2m2)  on either side of T2  were opened  to test  whether the stratigraphy found in the first two trenches was consistent   over the whole (or at least most) of the terrain.  They were also within the areas studied by the geophysical survey.  It was not possible to open a trench  at the highest part of the garden  (eastern end) as that area had to be kept available for campers.   The trenches were all located by measurements taken from plans provided by the developer.   The  topsoil of all the trenches, except T1, was removed  by a small  digger to the top of  the in situ yellow-brown  clay. T1 was entirely hand excavated.  

5.  STRATIGRAPHICAL SEQUENCE

  The stratigraphical sequence in all  four of the trenches was identical but the thickness of the deposits varied slightly in the different trenches in accordance with the slope of the hill..  Table below illustrates this sequence in a representative section of  Trench 2: 

Layer 1 Topsoil - 
Brown clayey loam with  turf and recent material, average thickness 0.2m

Layer 2 Natural probably Early Holocene solifluction deposit
Yellow-brown clay with fine decayed limestone, average thickness 0.2m – 0.35m ,

Layer 3 Natural Late Pleistocene deposit


Pale yellow -orangey gritty loam with slatty pieces of limestone, sandy in some places, thickness not ascertainable.

  6.GEOCHRONOLOGICAL AND ENVIRONMENTAL  INTERPRETATIONS

   The above sequence of  deposits is similar to that found at the base of the archaeological layers in   the excavations of the Mesolithic sites at Portland Site 1 (Bird Observatory) and  Culverwell  (Palmer , 1969, 1971 and 1999). Layer 2 was interpreted as  clay which  resulted  in early Holocene times from the scouring  of  fresh water  and  fine rubble  over  the  Pleistocene  terrain of the Island.  Other excavations  carried out by  the present author on Portland,  appear to indicate that the clay accumulated only  in low laying areas and gullies  and contained debris derived from Pleistocene material, including mammalian remains as at the Verne and in Reforne (Palmer, 1998; 1999).   The top of Layer 3, above, is  an original  freshwater Pleistocene land surface on which  Late Palaeolithic people  had a presence.  As far as known at present, it is the earliest deposit on the Island to contain  intrusive archaeological material. In areas where the clay (6.1 above) is absent, Mesolithic people were also active on this land surface and their tools became mixed  with  the remains of  an earlier period, as at Culverwell (Palmer 1999, section 1.3).  The stratigraphy of this loam can be studied in relationship to the early  Raised Beach deposits which is clearly visible above the East and West  Raised Beaches at the Bill  and is there referred to as ‘Head’.   The precise ages of these Beaches  are still disputable and being  researched  but  stages within the  Middle to Late Pleistocene are  indicated (Andrews, Bowen & Kidsdon, 1979; Davies & Keen, 1985;  Keen, 1985).  The West Beach    is relatively  the oldest of the two Beaches   and has, cautiously, been referred to    aminozones varying (according to different authors)  between 4 -7. This means  it is likely that the East Beach is much more recent, perhaps zone 3.  There are, however,  various problems associated with these dating zones, not least relating to the formation of  the overlying deposits.   Not all authorities are in full agreement  with each other (Davies &  Keen, op cit.).    This problematical situation, relevant  to the ‘Head’ above these Beaches   was  tentatively addressed in a study by Keene (1985).  The yellow-orangey loam (Head)  is a freshwater deposit but at  the  base contains abraded  (derived) fragments of  sea-water  mollusca.  It can, therefore, be deduced that the loam began to form during a  period of lowering sea-levels  and  a fair degree of precipitation.     These conditions could correspond to either the end of  the  arctic Older Dryas climatic phase or the    Younger Dryas  phase of the Late Pleistocene  but there can as yet be no certainty  as to which  is relevant. The latter would fit in best with the data from the excavated  early Holocene sites on Portland.  The environment in the periglacial zone of southern England would have been one of fairly cold   climate  and the terrain one of  ponds, marsh and grassland (Keen, op cit).     The typology of the artefacts suggest  that  the  Late Palaeolithic people probably arrived on Portland sometime after the  end of the cold Younger Dryas period and during  the early   warm  Preboreal  c 10,500 years ago.   A subsequent  wetter climatic phase, possibly during the continental Boreal warm phase (when Mesolithic people  began to arrive),  caused streams of  muddy water to scour the terrain  and form the brown clay, referred to above 5. and 6.1. This clay incorporated  derived material of Late Palaeolithic aspect in it as it flowed over the Portland terrain and accumulated in low-lying areas and in gullies as at Culverwell.   It is possible that the above scenario was demonstrated in the geochronological position of  two   deposits of shell midden (with charcoal evidence) which was noticed in 1996  by the present author and other members of the Association for Portland Archaeology one evening  during the roadworks on the slope of the Verne to widen New Road  (Palmer, 1998, pg. 18, para 2). The two middens  (one large, one small) were near each other and consisted of shell within deposits of  dark clay with stone rubble about 5 metres below the present topsoil.  As described, it was impossible to  research that find properly at the time due to conditions of site visits imposed by the  D.C.C. contractors  and, unfortunately,  by the next day the site was destroyed or completely covered with rubble.  At the end of the 19th century  Damon (1884) had  mentioned a   midden  ‘with flint’ artefacts  in the ‘top of glacial drift within the south-west glacis of the Verne adjacent the road to Fortuneswell’.  It is possible that the middens noticed in 1996  may  be the same  (or part of the same) as noticed by Damon.  These middens are likely to be of Pleistocene dating, as suggested by their stratigraphical position in the deposit exposures.  

7. FEATURES

   No  man-made  features were found in the excavated trenches.  It was concluded  that the anomalies suggested by the geophysical survey were due to natural  irregularities. It appears from other experiences elsewhere  on Portland, that geophysical research results  are often  difficult to interpret because of the shallowness of the topsoil and the nature of the bedrock.  

8.  ARCHAEOLOGICAL  FINDS  AND DISCUSSION

   A complete list of all the archaeological material found during the excavation of  the Youth Hostel site is given in Table 1. They all appear to be of a Late Palaeolithic character.   At both Site 1 and Culverwell  some artefacts of a Late Palaeolithic aspect have been found but mixed in with artefacts from the  predominantly   Mesolithic assemblages. The first Mesolithic occupation occurred on top of  the clay and loam  described above. The Youth Hostel site is the only one so far examined on Portland which produced an assemblage  of artefacts  exclusively  of a Late Palaeolithic aspect  in association with contemporary  natural  deposits of  the loam. It is suggested that finds in Layer 2 were derived  by natural  agencies from the context of  in situ Layer  3, as discussed in 6.6 above   Many of the artefacts found at the Youth Hostel site resembles some of the artefacts from the Verne (Palmer 1968) in  typology and the boldness and steep angles of edge  retouch. A blunting retouch is also quite prominent.    Bulbar features in at least a third of the artefacts are either  very limited or even completely absent  and there are indications that these artefacts were made by edge retouching nodules of chert which were broken off from  chert exposures by  thermal action.  This means that the Late Palaeolithic people utilized  material which was lying around on the ground  where they were sitting  and that they did not bother to  obtain their artefact material from primary sources, such as the beach or cliff exposures. This is a characteristic, which it is now realised with hind-sight, is also visible in several of the artefacts from the Verne (see e.g. Palmer, op cit Fig. 1 no. 1).   When bulbar scars are present on the artefacts, they are often  somewhat diffused, as though they have been  abraded away. This characteristic could possibly be explained  by an assumption that these artefacts were slowly moved within clay  from higher ground (i.e. nearer to the top of the Verne) over rough terrain to  the positions where they were ultimately found   This abraded condition of the artefacts suggest strongly that they were not made directly on the Youth Hostel site.    The relatively high number of artefacts found,  suggest that the knapping site, or activity site where they were used, could not have been too far away as   all the artefacts would have been much more severely abraded if they had been moved a great distance.   The finding of two conjoining flakes  from  Trench 2  on the top of Layer 2  could suggest  that at least some of the artefacts on the site were made there. These differing degrees of abrasion could indicate that possibly more than one original activity area was involved.  The majority of artefacts in the collected assemblage are scrapers.  These include convex scrapers (the majority), concave scrapers, some concave-convex , a few steep scrapers on thick or chunky pieces of chert  and a small number of end and side scrapers.  The next most common  artefacts are awls  or  flakes  with limited edge retouch which could have been used for cutting purposes.  Only a few points are present and they are mostly  broken.  

Finds other than lithic.

One small sherd  from a black Roman pot was found  in the top of Layer 2 of  Trench 2.    This indicates that there was an element of   later intrusion into the early archaeological layers. There was no indication as to the nature of this intrusion. Two small pieces of shale were also found in the same context.   One small item each from   Trench 3 Layer 2  and Trench 4 Layer 2 appears to be parts of the hinge of a shell. 

The following is a summary of the finds: 

A total of 263 lithic pieces were found. Primary flakes with bulbar scars only predominate (132); scrapers 47; flakes with limited edge retouch  52 of which 15 were on thermally fractured flakes;  scrapers 47; awls 5; 9 points; 5 flakes with blunting retouch; fabricator 1; knife 1; burin 1.  Three hammerstones were found as well as 4 beach pebbles which had been imported from the beach.   Two flakes from Trench 1 were found to be conjoining.   Only one Roman potsherd was found.

9. CONCLUSIONS

  The Youth Hostel site is important academically as it provides some clarification of the situation found on the excavated two Mesolithic sites on the Island, i.e. the presence of  artefacts of Late Palaeolithic aspect within artefactual deposits and features which are otherwise  predominantly Mesolithic.   The YH site also provides a  small degree of clarification as to the possible geochronological relationship of the Late Palaeolithic and Mesolithic occupation of  Portland  and indicates a situation which should be kept in mind for further future research.   The camping  or activity area where the Late Palaeolithic artefacts were made or  used,  was  somewhere not far from the Youth Hostel site, possibly just a little higher up the slope of the Verne in the areas now occupied by housing estates.     The middens noticed by members of A.P.A.(6.8 above)   were almost certainly  of Late Palaeolithic date and  were  possibly associated with the people whose artefacts were found at the Youth Hostel, or at least, with people of  roughly the same time.  This makes it all the more regrettable that those middens could not be properly recorded and researched.   The finding of  artefacts of Late Palaeolithic aspect at  the Verne, Portland Site,1 Culverwell , the Youth Hostel and elsewhere on Portland (Palmer, 1998) suggest that the distribution of activities associated with Late Palaeolithic people  ranged quite widely over Portland  and the group or groups  of people of that time may have been  fairly sizeable.    The restricted  typology of  the artefacts of this period now known from Portland, suggest that the Late Palaeolithic people were mostly involved in hunting (possibly small animals, e.g. small deer) and then cutting and cleaning the skins with scrapers. Although they were probably mobile hunters and gatherers,  the middens suggest that they sometimes did camp on Portland for at least short periods at a time while engaged in a particular activity.


BIBLIOGRAPHY

  Andrews, J.T., Bowen, D.Q. and Kidson. 1979. Amino acid ratios and the correlation of raised beach deposits in south west England and Wales. Nature 281, 556-8. Davies, K. Headon   and Keen, D.H. 1985.  The age of Pleistocene marine deposits at Portland, Dorset. Proceedings of  the Geological Association , 217-225. Keen, D.H. 1985. Late Pleistocene deposits and mollusca from Portland, Dorset.  Geological Magazine, 122 (2), 181-186. Palmer, S. 1968. Upper Palaeolithic artefacts from Portland. Proceedings Dorset Natural History and Archaeological Society, 89, 117-119. Palmer, S. 1969. A Mesolithic site at Portland Bill. Proceedings Dorset Natural History and Archaeological Society, 90. 183-206.  Palmer, S. 1971. Second Report on excavations at Portland Site 1, 1967 to 1968. Proceedings Dorset Natural History and Archaeological Society, 92, 168-180. Palmer, S. 1998. Ancient Portland  - Archaeology of  the Isle. Portland. Palmer, S. 1999. Culverwell Mesolithic Habitation Site Isle of Portland, Dorset.  Excavation Report and research studies. B.A.R. British Series 287. Oxford.

 


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