Category Archives: visualisation

The unexpected little joys of lithic use wear analyses II

A little while ago I posted a photo of a crystal inclusion in a white flint bladelet. I promised to post some more, whenever I think of it. So here is another example of the beautiful things I have encountered doing the use wear analyses. This burnt flint bladelet, like the last example from Late Mesolithic layers at Lutter/St. Joseph, France, did not show any signs of use. However, the microscope does show beautifully the microfossils within the flint, or possibly radiolarite, out of which it was made. And, like the last example, this photo also shows the possibilities of the digital microscope I have been able to use for the study of the use wear analyses of Late Mesolithic artefacts from two Lutter/St. Joseph, France and Arconciel/La Souche, Switzerland.

Microfossils, Lutter/St. Joseph. France. Mesolithic

Micro-fossils in a Late Mesolithic burnt retouched bladelet from Lutter/St. Joseph, France. Composite (focus stacking) image (150x) I made with a Keyence Digital microscope (Dep. Of Geosciences at the Université du Fribourg, Switzerland.)

The unexpected little joys of lithic use wear analyses I

Sometimes, when doing the microscopic analyses of use wear traces I come across fascinating things that have little to do with the actual use wear of the tools being studied. Instead they either provide something of a background to their natural origins or are just visually interesting. The digital microscope I have been using at the Dep. Of Geosciences at the Université de Fribourg, Switzerland has many technical possibilities. It allows me to document not only the use wear traces using a variety of photographic technologies. It also provides the opportunity to record composite photos such as this one of an otherwise not very interesting bladelet fragment from the site of Lutter/St. Joseph, in the French Alsace. I’ll try to publish a few more of such examples in the near future.

Lutter/St. Joseph, France. Crystal inclusion in a Mesolithic flint bladelet.

Crystal inclusion in a Late Mesolithic flint bladelet fragment from Lutter/St. Joseph, France. Composite (focus stacking) image (100x) I made with a Keyence Digital microscope (Dep. Of Geosciences at the Université du Fribourg, Switzerland.)

Hazelnutrelations goes old school! Would you like some lithics in your postbox?

English text below

Liebe LeserInnen

Schon seit 8 Jahren schleudert hazelnut_relations Wörter und Bilder rund um das Thema meiner Dissertation und meiner weiteren archäologischen Interessen in die digitale Welt hinein. Aber jetzt, endlich, getraut hazelnut_relations sich in die Welt des Analogen hinaus. Die Bilder, die bei der Untersuchung von Gebrauchsspuren an mesolithischen Steinartefakten (meine Dissertation) entstehen, sind nicht nur wissenschaftlich interessant, aber oft durchaus auch schön. Ben Peyer von Version1 und ich habe jetzt eine kleine Auswahl von Bildern verwendet um eine Serie von Postkarten zu produzieren. Und ich würde sie sehr gerne mit Euch teilen!
Wenn Du jetzt neugierig an den Postkarten geworden bist, schick mir etwas mit deiner Adresse darauf in der Post. Was? Irgendetwas: Etwas Archäologisches oder auch etwas völlig anderes, etwas woran Du gerade arbeitest oder etwas was Du gemacht hast oder von wo Du zuhause bist. Ein Foto, ein Flugblatt, ein paar Wörter, einfach irgendetwas was Dich begeistert! Und ich werde mit den Postkarten antworten. Also, nicht vergessen deine Adresse zu erwähnen! Meine Postadresse: Jurablickstr. 5, 3095 Spiegel b.B., Suisse. Ich würde mich sehr freuen von Euch zu hören!

Möchtest Du mehr erfahren warum ich mich entschieden habe diese Postkarte zu machen? klick hier.


Dear readers

For almost exactly 8 years now hazelnut_relations has been spouting out words and pictures about my PhD research and my other archaeological adventures. But now, finally, hazelnut_relations is daring its first tentative steps out of the digital into the analogue. The use wear analysis of Mesolithic stone artefacts I do as part of my PhD research, produces images that are not only scientifically interesting, but that are often also beautiful in their own right. Ben Peyer of Version1 and I have now used these images to make a series of postcards. And I would be very happy to share these with you!

So, if you are curious about these cards, send me something with your address on it by post. Anything you like sharing. Something archaeological or something completely different you are working on or you like, something you made, something from near where you live. A photo, a postcard, a flyer, a few words, anything you are enthusiastic about. Anything at all! In return I will reply with our postcards. So don’t forget to include your postal address! My postal address:Jurablickstr. 5, 3095 Spiegel b.B., Suisse. I would really love to hear from you!

If you would like to know more about why I decided to make these postcards, click here.

Transforming prehistoric gestures into present day objects. Turning your (PhD-)research into postcards.

Like many archaeologists, I spend my days in a lab or at a desk. I study microscopic traces of use on Late Mesolithic and very early Neolithic stone artefacts to try to find out what these tools were actually used for all those thousands of years ago. By understanding the use of various types of tools we hope to understand the lives and activities on the sites they were found (Arconciel/La Souche and Lutter/St. Joseph) and in Switzerland/Western France at the time of the last hunter-gatherers and the first farmers here. This period, roughly 6500 to 4800 BC, is a fascinating period, during which many things, not least the economy, changes. That is the story I wanted to tell and I wanted to do this in a light-hearted and accessible way. At the same time I wanted to avoid the typical channels of public outreach. But I did want to show the beauty of the process of doing archaeology. This fascination for the archaeology of hunter-fisher-gatherer societies and the transition from the Mesolithic to the Neolithic of the early Holocene together with the wonder of seeing the activities and lives of people who lived such different lives from us in these small stone artefacts were the main reason behind the decision to do something with all the photos I am taking at the microscope.

We archaeologists often tell stories about the sites and objects we study after we have finished excavating and have done with all our analyses. Often the stories we tell are presented as complete and certain, while actually they are often complex and full of ambiguity and are seldom truly finished. We also show reconstructions or we invite the public to visit our excavations, the archetypical activity of archaeologists, and tell stories about and show photos from our digs in more or less exotic localities. But we rarely show the processes and the work we spend most of our time on: Our work in labs, in offices in dark basements of archaeological institutes, hot dighouses or even cold office containers on excavation sites. I hope to show some of these processes of making sense of the archaeological remains and knowledge creation through these postcards. Our, my daily work and the beautiful and fascinating things and objects this work creates and which are seldom seen by anyone.

Most visual depictions by archaeologists either try to show realistic or natural representations of archaeological remains, objects or archaeological deposits or they try to tell a story by creating visual reconstructions. Others are more picturesque and depict the archaeology in the context of the other, the exotic. A fourth category of archaeological visualisations are ethnographic in nature. Especially the first three types of images are usually published in scientific archaeological publications and reports. If the process of doing archaeology is recorded, it is often in the form of the ethnography of archaeology. With these postcards I hope to document the process of archaeology in a differing way. Furthermore, by publishing them on postcards, these photos are able to leave the elitist and restricted realm of scientific publication and other environments in which archaeology can usual be found, be it museums or public monuments or websites. The postcards feature microscopic photos of use wear traces and thus transform the gestures of people in the distant past into material haptic objects in the everyday lives of people in the twenty-first century.

Further inspirations for this little postcards project are the latent undercurrent of and recent call for more alternative and punk-ethos in certain circles in the archaeological community and the stones of the Murgtal Steingarten-project and Mail Art activities of concept artist H.R. Fricker. They stimulated me in the first place to produce something relatively inexpensive and easy to produce (of course, this would not have been possible without the great Ben Peyer of Version1!), common objects, but also something that could feature in everyday life and does not require huge effort on the part of the beholder. Postcards fitted the bill. On the one hand they are collectable objects, on the other they are mundane, everyday objects.

The postcards me and Ben made certainly don’t follow the visual vocabulary of the punk-tradition, but using such mundane objects for publicising my PhD-research and injecting them into everyday life, they might refer to some extend to the punk-ethos. Not unlike the visual output of punk culture, Mail-Artists in the second half of the 20th century made a lot of use of collage and montage techniques as well as stamps and other media and also had a strong d-i-y tradition. Furthermore, I hope the postcards also refer in a tongue-in-cheek manner to the Mail-Art movement and the way scientists in the past – before scientific journals became so common – spread and discussed their scientific findings by correspondence and letters.

Both the punk and the Mail Art movements were also about creating and maintaining communities at various scales. Lately, a lot of exchange between archaeologists and scientists in general takes place in the digital world, via email, social media, blogs, podcasts and platform such as researchgate. With these postcards I would like to extend these lively conversations into the physical world while at the same time, using digital channels to spread them. And last, I still think it is great to receive a postcard in the post and love sending them.

So, if you want to know how to receive a postcards, have a look here. It would be great to hear from you!

I decided not to use references in this text, but the following publications have inspired the production of the postcards and this text:
• Barthes, R., 1980, La chambre claire, Paris
• Edwards, E., 2002, Material beings: objecthood and ethnographic photographs, in Visual Studies, Vol. 17, 1
• H.R. Fricker > work in general more specifically the Steingarten Murgtal project
• Hamilakis, Y., Anagnostopoulos, A. and Ifantidis, F. (2009) Postcards from the edge of time: archaeology, photography, archaeological ethnography, in Public Archaeology, 8, (2-3), 283-309
Punk Archaeology
• Shanks, M. 1997, Photography and Archaeology, in Brian Molyneaux, B. (ed), The Cultural Life of Images: Visual representation in Archaeology
• Those two great blogs by Colleen Morgan – Middle Savagery and Bill Caraher – The archaeology of the mediterranean world


Visualising lithic use wear traces – photo stacking

It is not always immediately apparent to non-specialists what we – use wear analysts – do and see and how we can be certain of our observations. This is partially due to the imagery many use wear analysts produce. In a recent paper A. van Gijn (2013) reflects on the current state of the field of lithic microwear or use-wear analysis and points out a number of aspects of our work in which improvements are possible or even necessary. These, in my opinion rightly, include an increase in sample sizes (e.g. by scanning tools with a stereomicroscope before moving on to higher magnifications); more incorporation of ethnographic data; a standardisation of practise and nomenclature; embedding the use wear traces in the cultural biographies of artefacts and providing better quality imagery.

The basal end of a Mesolithic scraper from Arconciel/La Souche, Switzerland (quartzit au grain fin/Ölquarzit). Left a normal photo. Right a composite photo of the same part of the artefact. Taken with a Keyence Digital Microscope.

The basal end of a Mesolithic scraper from Arconciel/La Souche, Switzerland (quartzit au grain fin/Ölquarzit). Left a normal photo. Right a composite photo of the same part of the artefact. Taken with a Keyence Digital Microscope.

The last point can be achieved by photo-stacking through the use of specialist software or microscopes, such as the digital microscope I use, which are able to make composite photos. The image above shows what photo stacking or composite photos allows you to do.

One major drawback of the microwear approach is the lack of convincing visual evidence. The pictures generally shown at meetings are fuzzy and lack depth of field. Usually only a small part of the photograph is sharp, namely the spot of polish we want to address. Although insiders may usually see and recognize what is being discussed, it is little wonder that the general audience has no idea what it has to look at and remains rather skeptical. There is much to gain from improving the visualization of the microwear traces. – A. L. van Gijn (2013 – p. 3)

Typically, it is difficult to make microscopic photos of larger parts of artefacts that are in focus. Photo stacking, however, allows exactly this: an increased depth of field with much larger parts of the artefact shown in focus. This way not only the traces, but also their contexts can be visualised. I find this technique does not work very well in all situations or for all raw-materials or for all traces. Nonetheless, it makes our work more effective and it will surely allow us to communicate our methodology and findings much better not only to fellow specialists, but also to non-use wear specialist archaeologists and the general public.

Gijn, van A. (2013). Science and interpretation in microwear studies, Journal of Archaeological Science, DOI:

Historical fantasies or the inherent subjectivity of archaeology? Die Pfahlbauer in Bern.

In the Swiss national newspaper NZZ, Urs Hafner wrote an eloquent short but critical review of the current Pile dwelling-exhibition in the Bernisches Historisches Museum titled `Historische Phantasie´ (in German). His criticism focuses on the little attention the Neolithisation process gets in the exhibition and the large panels showing scenes of daily live in Neolithic and Bronze Age Pile dwelling villages. (My review can be found here.)

Bauen und Wohnen (Neolithikum) Leucht-Wandbilder (270 x 1000 cm), Ausstellung Die Pfahlbauer - Am Wasser und über die Alpen, in Zusammenarbeit mit Bernisches Historisches Museum

Bauen und Wohnen (Neolithikum) Leucht-Wandbilder (270 x 1000 cm), Ausstellung Die Pfahlbauer – Am Wasser und über die Alpen. Atelier Bunter Hund, in Zusammenarbeit mit Bernisches Historisches Museum

First, it should be said that by the time of the oldest known Swiss pile dwellings (~4300 BC), the processes of Neolithisation in Switzerland and surrounding areas can be considered concluded (`Neolithic Revolution´ is by archaeologists today seen as an antiquated term). Already 1000 years before the first lake side villages sedentary farmers were living in regions north of the Alps, including Switzerland (e.g. at Gächlingen, Schaffhausen, Bottmingen/Bäumliackerstrasse, Basel and Herznach-Unterdorf, Aargau).

Hafner’s main criticism is the projection of our believes and subjective interpretations on aspects of the lives of past peoples. He wonders whether we know how houses were furnished and whether we actually know if people had chairs and tables in their houses or not. Actually, I believe it can be assumed we do know. As the exhibition shows the preservation at these sites is of such quality that if such items of furniture were common, we would have found them. We also know there were fireplaces in the houses, we know which artefacts were found where within a settlement, so also whether that was within houses or not. We can often tell how certain artefacts were used and what people ate. This amazing range of archaeological evidence allows us many unexpected insights into the daily lives of prehistoric people.

Lastly, archaeology is a science which studies the lives of past people through their material remains. And although we can never assume to be objective – we archaeologists are too much part of our own culture – we have a large and ever-increasing knowledge and understanding of prehistoric people, not in the least because of advances in other scientific subjects with which we cooperate, such as physical anthropology and palaeoenvironmental sciences. But yes, some of our interpretations are just that, interpretations. That is our job as archaeologists, to collect the archaeological evidence using up-to-date scientific methods, to subsequently interpret this evidence to our best ability and share our findings with the public. It goes without saying, we do this from our own position in the world. But doing so we also incorporate the current knowledge base of the discussed period as well as others, here in Switzerland and beyond. Moreover, this is a cumulative knowledge, gathered by scientists throughout the past few hundred years.

The panels in the exhibition show what we know about the people living on the lakes between 4300-800 BC resulting from the described scientific processes and the most likely interpretation of this knowledge. And that there is some fiction in them – as there is in the paintings by Anker albeit far, far more – should be clear to visitors. As archaeologists we use such visualisations to show what we know about (pre-)historic life. The medium dictates that this is impossible without including some fiction, in the same way a historical novel does, although less of course. So, should we make the general public read scientific reports instead? Stop making reconstruction visuals? Stop writing historical novels or cartoons and designing exhibitions? Or provide an accompanying books which are to be read before visiting the exhibition? I think not.

Archaeology and visual representation have a long history together. This includes photography and drawing. Both are an integral part of the archaeological process, drawing arguably a bit more. Drawing is deeply integrated in the archaeological processes of recovery, understanding and interpretation. This already starts during the excavation and continues afterwards. Producing field plans, phase plans and finds drawings help the archaeologist understand the evidence from the past (Wickstead 2008). Scenic reconstructions are a further step in this process. When making a new scenic interpretation of the finds from the Iron Age archaeology at the salt mines of Hallstatt, Rescheiter et al (2013) have written a scientific text to accompany it and explain their decisions on what to show and why. (There exists an extensive literature on the visualisation of archaeology which cannot all be dealt with within the space of a blog post). This will be interesting for fellow scientists, perhaps less so for a general audience in an exhibition. Forster (2012) takes a different approach. She shows the making of a scenic reconstruction of the interpretation of a shepherd’s shelter and the find from it. It poignantly shows what the archaeological evidence is and what interpretation. I could, for example, also imagine documenting the process of the making of scenic panels such as those shown in Bern in film, which can be shown as part of the exhibition. It is now up to the exhibition makers in Bern whether they see it fit to provide more information concerning these panels or not. As an archaeologist I’d be interested in their opinion. Certainly it is in itself a success that the panels are being discussed at all.

Dominic Groebner Hans Reschreiter NHM Wien 2012

By D. Groebner – Hans Reschreiter – Naturhistorisches Museum Wien [CC-BY-3.0 (, via Wikimedia Commons

That does not take away that to not attempt to interpret would be a serious deficiency on the side of the archaeologists. So it is not that we archaeologists do not want to look upon the `Pfahlbauer´ objectively, or in Hafner’s words `ohne Projektionen´. But firstly these panels might be less subjective than might be expected (we do know, for example that the Lady of Spiez-Einigen was buried lying on a sheepskin) and secondly, we simply have no choice but to be – to some extend – subjective. And even if we could travel back in time, we could still not truly know what it was to be a farmer living on the Lake of Biel in 1800 BC.



Forster E. (2012). Vom archäoligischen Befund zum Lebensbild, Reitmaier, Th. [Hrsg.], Letzte Jäger, erste Hirten. Hochalpine Archäologie in der Silvretta, Archäologischer Dienst Graubünden, Chur, 67-69. DOI:

Reschreiter, H. , Pany-Kucera, D. & Gröbner, D. (2013). Kinderarbeit in 100m Tiefe? neue Lebensbilder zum prähistorischen Hallstätter Salzbergbau, Karl & R. Leskovar, J. [Hrsg.], Interpretierte Eisenzeiten. Fallstudien, Methoden, Theorie. Tagungsbeiträge der 5. Linzer Gespräche zur interpretativen Eisenzeitarchäologie. Studien zur Kulturgeschichte von Oberösterreich, 37 25-38.

Wickstead, H. (2008), Drawing archaeology, in Duff, L. & Sawdon, Ph. [eds.], Drawing: the purpose. Bristol, U.K., Intellect Books. 13-27

Spurenleser – use wear analyses animation

Arte TV has produced a lovely series of short informative animated films about archaeological specialists. And one is about use wear analyses!

Archäeologie Experte – Spurenleser.

If your  German is a bit rusty, there is also a French version (le tracéologue). And you might want to take the opportunity to procrastinate a bit more and watch all of them! Finally find out about what these palynologists and ceramic specialists and geomorphologists really d0.

Still from Spurenleser - Archäologie Experte. Arte TV

Still from Spurenleser – Archäologie Experte. Arte TV