multi-phase site

Mike Middleton (RCAHMS) – Shetland

The archaeology of Sumburgh, Shetland.

The author in Levenwick c.1977. Copyright Mike Middleton

The author in Levenwick c.1977. Copyright Mike Middleton

I’m Mike Middleton and I manage two nationwide archaeological mapping projects. The Historic Land-Use Assessment , is mapping signs of past land-use preserved within the modern landscape and the Canmore Mapping is focussing on the known extent of archaeological sites recorded in the RCAHMS Canmore online record of monuments.

I’ve chosen the archaeology of Sumburgh at the south end of mainland Shetland where I spent many happy hours, as a child, scrambling over the archaeological sites without really knowing what they were. Both my parents worked at the airport and being busy people, they were often at work when I finished school. So I would spend time out playing with my friends, on the beaches and land around the airport. There were loads of great places to play. One of our favourites was the abandoned WWII defences. Built quickly out of poured concrete onto sand, the buildings had no foundations and have subsided and partially collapsed over the years providing the perfect place for young boys to play war games.

If we were feeling more adventurous we would head down to watch the seals and sea birds at the bottom end of the Ness of Burgi. En route we would pass the Ness of Burgi fort. Known as a blockhouse or gatehouse fort and built during the Iron Age, around 100BC, the fort has a rectangular gatehouse cutting off a narrow promontory. With its low, broch-like entrance and cells to each side it was an excellent playhouse.

The Ness of Burgi blockhouse from the north-west. Copyright RCAHMS (SC 342869].

The Ness of Burgi blockhouse from the north-west. Copyright RCAHMS (SC 342869].

A view from inside the reconstructed wheelhouse at Scatness. Public contribution to Canmore, Copyright Mike Middleton

A view from inside the reconstructed wheelhouse at Scatness. Public contribution to Canmore, Copyright Mike Middleton

Most amazing to me now, as I had no idea it was there at the time, is the multi phase site of Scatness. The site was excavated in the late 1990s and revealed evidence for Iron Age, Norse and Post-Medieval settlement. It is dominated by the remains of a broch and surrounding wheelhouses. Both of these monument types are Iron Age drystone structures specific to Scotland. Brochs are hollow-walled and tower-like in form while wheelhouses incorporate a series of stone piers within the outer wall much like the spokes on the wheel of a bike. I still find it hard to believe that so much was under the ground I played on and invisible to me at the time. Equally amazing is the proximity of the Scatness site to the very similar and just as complex multi phase site of Jarlshof.

An image of a Viking ship incised into a piece of slate. The author’s favourite find from Jarlshof. Copyright RCAHMS (SC1221187)

An image of a Viking ship incised into a piece of slate. The author’s favourite find from Jarlshof. Copyright RCAHMS (SC1221187)

Although as children we didn’t know Scatness was there, we weren’t short of brochs to play on because just opposite the end of one of the runways is Brough Head broch or Eastshore broch as I knew it as a kid. The site is partially eroded by the sea, cutting it in half, something of particular fascination to us children. Like Scatness and Jarlshof the broch is surrounded by unexcavated earth covered structures and abandoned 19th-century farm buildings. It is quite possible that if excavated this site could be as complex as Scatness and Jarlshof.

Brough Head broch from the sea showing the two walls of the broch exposed. Public contribution to Canmore, Copyright Mike Middleton

Brough Head broch from the sea showing the two walls of the broch exposed. Public contribution to Canmore, Copyright Mike Middleton

Sumburgh has an incredibly rich archaeological resource. I look back with fondness and frustration at my youth playing on these monuments. I feel lucky that I have had the chance to grow up in such a rich archaeological environment while disappointed I didn’t understand what they were at the time. However, the sites of Sumburgh also provide a snapshot of the big issues facing our heritage today. The hastily built WWII defences were constructed as temporary structures. Made from concrete and often in poor repair many of us don’t realise their historical significance. These factors mean that our wartime sites are one of the most rapidly diminishing archaeological resources in Scotland. The Brough Head broch, Jarlshof and the Ness of Burgi Fort are all suffering the effects of coastal erosion, a threat facing thousands of sites worldwide and those maintaining the sites at Scatness and Jarlshof, have to balance the needs of conservation with the thousands of tourists who wish to visit these wonderful sites. What the archaeology of Sumburgh illustrates is it that not every site can be saved. It is just a matter of time before sites like Brough Head are lost to the sea and there just isn’t the resource to save all the threatened sites in Scotland. However, we can record these monuments and make this information available so we, or others in the future, can try and understand them better. We can’t all excavate sites but we can all take a photograph and draw a plan. We don’t need to excavate every site to understand it. By taking photographs or drawing plans we can all record vital information. You can be part of this process by visiting sites, helping to record them and then uploading your research using the MyCanmore public contribution tool. We need your help to record our heritage. We can only do it together!

This is what I’ve chosen for Day of Archaeology, but why not tell us your favourite archaeological sites in Scotland on Twitter using #MyArchaeology.

Iron Age Slag – No Puns Please!

I’m Dawn McLaren and I’m a finds specialist at AOC Archaeology Group based at Loanhead, Scotland. On a day-to-day basis I’m principally involved in the post-excavation analysis of artefacts recovered as the result of developer-led excavations ranging from early prehistoric through to post-medieval in date. To give you an idea of the range of finds that I deal with, in the last couple of weeks I’ve been looking at coarse stone tools and querns from an Iron Age settlement, some pottery from a Bronze Age burial and post-medieval metal finds from an urban site in Edinburgh. It definitely keeps me on my toes!  

Today I’ve been examining some later prehistoric ironworking waste from a multi-phase site at Beechwood, Inverness and I’m really excited about what it is telling us about metalworking on the site.  The site, which was excavated by my colleague Rob Engl and others, revealed several Bronze Age/Iron Age timber roundhouses, palisades and enclosures together with evidence of Neolithic settlement.

Dawn identifying slag from Beechwood

Starting from the beginning, what is ironworking waste?  Basically, it is the non-iron component of ore that is separated out from the iron during smelting and smithing but there is inevitably other associated debris such as bits of ceramic hearth lining and vitrified stone which don’t necessarily need to be connected to metalworking. I’m terribly over simplifying, of course, but I hope this gives you an idea. Visually, this material doesn’t look like much, I admit! It often looks like rusty or glassy shapeless ugly lumps. But I’ve been trying for years to convince people that it’s really interesting and can tell us a lot about metalworking technology.

My first step is always to visually examine (macro and microscopically) the individual pieces looking at the colour, texture, shape and how melted and fused the material is. Another important part of the initial identification is to determine whether the material is magnetic. All of this information helps me to split the assemblage into broad categories: what is ironworking waste and what has been formed as the result of another pyrotechnic process, what is diagnostic of iron smelting and what might be bloom- or blacksmithing debris. Once I’ve identified the individual pieces, I record all the details (e.g. weight, quantity of pieces and measurements) into a spreadsheet so that I can feed in the contextual data later.

Small smithing hearth bottom from Beechwood

I’m pleased to say that the assemblage from Beechwood has a bit of everything!  It’s not a large assemblage but so far I’ve identified several smithing hearth bottoms and fragments of smelting waste so that I can say that both processes were taking place on or around the site.

Smelting slag from Beechwood

Now that my catalogue of the slag is complete I’ve started to look at where the pieces were recovered from. The excavations at Beechwood covered a very large area and I can see from my initial examination that the ironworking debris is focused in two quite disparate parts of the site. One area, which we’ll call A, includes a possible metalworking hearth or furnace associated with smelting slags and the other area, B, which is quite a distance away and must represent a separate focus of activity, has small residual amounts of both smelting and smithing debris. We’ve already had some of the pits and postholes from these areas radiocarbon dated and those associated with the ironworking waste have provided wonderful Iron Age dates.

Looks like my task for tomorrow is to see how the Beechwood evidence fits in to other Iron Age metalworking sites in the area!

For more information on our post-excavation services please check out our website:

2. Getting started in Archaeology: volunteering and studying as a part-time mature student

Getting started in archaeology: volunteering and studying as a part-time mature student

I’m going to explain how and why I came into archaeology (which will discuss volunteering and studying as a part-time mature student), and why I went into the field of early medieval archaeology. I hope this will show the positive effects of history and archaeology in schools, the role of museums in stimulating interest, and the significance of public access to archaeology. It will also hopefully provide some insight into the value of education, and the challenges of studying archaeology as a mature student.