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Abel Ruiz-Giralt

@archaeorg.bsky.social
870 followers 203 following 59 posts

Archaeologist interested in human-environment interactions. Archaeobotany, ethnoarchaeology, data science. #archaeology #rstats Most of my work is available at: www.researchgate.net/profile/Abel-R…

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Abel Ruiz-Giralt @archaeorg.bsky.social · 07/07/2026
www.researchgate.net/journal/Ethn...
researchgate.net
Ethnoarchaeology - Editor Pick by Francesca D'Agostini
This Editor's Peak highlights three recent studies spanning diverse cultural and environmental contexts. Stewart et al. examine settlement and land use in Arctic Canada, Politis et al. explore the mat...
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Abel Ruiz-Giralt @archaeorg.bsky.social · 12/06/2026
📢 After quite some time working on this, our new paper is finally out! We propose an updated framework for Anthropic Activity Markers, showing how compositional data analysis and geostatistics can help us make more robust archaeological inferences from soil geochemistry. doi.org/10.1007/s108...
doi.org
Anthropic Activity Markers 2.0: A Shift Towards Compositional Data Analysis - Journal of Archaeological Method and Theory
Anthropic Activity Markers (AAMs) were formalized over 10 years ago as a toolkit to infer human activities from biological and geochemical signatures preserved in sediments. This paper presents AAMs 2.0, a revised analytical framework that integrates compositional data analysis (CoDA) and geostatistics, as the appropriate statistical foundations for this approach. We first outline the theoretical motivation of this framework, demonstrating that treating geochemical concentrations as absolute values generates statistical artefacts that limit analytical reliability. Using the ethnoarchaeological dataset of Rondelli et al. (2014) as a test case, we illustrate how CoDA principles can be applied to revisit established interpretations. With this approach, we can identify meaningful compositional relationships without relying exclusively on heuristic element combinations, yielding results that are more statistically robust. Ultimately, AAMs 2.0 reframes activity markers as relational, ratio-based signals in space, providing a more rigorous foundation for archaeological inference.
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CAMP ERC UPF @camp-erc.bsky.social · 25/07/2025
Our PhD candidates did a great job presenting the preliminary results of the project at #SAfA2025. Hope you enjoyed the conference and see you soon 😁
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Abel Ruiz-Giralt @archaeorg.bsky.social · 25/07/2025
Session #55 on "Mapping African Archaeology" just started at #SAfA2025! Come by to hear about @camp-erc.bsky.social work by PhD candidate Antonios Koutrompas!
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CAMP ERC UPF @camp-erc.bsky.social · 22/07/2025
This morning, our PI Stefano Biagetti presented an overview of our work in the general session of the #SAfA2025. Come by the presentations by K. Rix (session #33) and A. Koutrompas (session #55) to learn more about our project!
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Bethany Black @bethanyblack.bsky.social · 22/07/2025
AI “thinks” in the same way a mirror looks at you
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Abel Ruiz-Giralt @archaeorg.bsky.social · 21/07/2025
Faro contrasts.. #SAfA2025
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Abel Ruiz-Giralt @archaeorg.bsky.social · 20/07/2025
Just arrived to Faro for #SAfA2025 with the @camp-erc.bsky.social team.and some friends! hope to see you around😁
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Jens Notroff @jensnotroff.com · 07/06/2025
Windows of Córdoba.
Photo of a bright ochre-yellow building front with six windows in two rows (each row: a window with two openings formed by a column in the centre, a window with three openings formed by two columns, and another one with two opening). Each window opening is crowned by a high arch, surrounded by light blue tiles, and framed by grey tiles with floral ornaments.
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Abel Ruiz-Giralt @archaeorg.bsky.social · 05/06/2025
From the creators of double-bagging in Botswana and Oman, let me introduce you to the wonders of Kenya cup preparation! 😁
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CAMP ERC UPF @camp-erc.bsky.social · 05/06/2025
#Sorghum is cultivated by #Turkana farmers in the banks of Turkwell river. They burn-and-slash to open land for cultivation and use earthen canals to irrigate the fields.
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Abel Ruiz-Giralt @archaeorg.bsky.social · 04/06/2025
⚠️ #PhD opportunity⚠️ If you are interested in #Archaeology and #Pastoralism, ERC-project CAMP offers a fully-funded PhD position in UPF (Barcelona) to study plant microremains and geochemical signatures in pastoral contexts. Apply by July 10th! More info. below 👇🏼 euraxess.ec.europa.eu/jobs/346669
euraxess.ec.europa.eu
HUM-PIPF-2025-02 ERC-Funded PhD position on (Re)Constructing the Archaeology of Mobile Pastoralism (CAMP) Bringing the site level into long-term pastoral narratives
One ERC-Funded PhD position on (Re)Constructing the Archaeology of Mobile Pastoralism (CAMP) Bringing the site level into long-term pastoral narratives
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Abel Ruiz-Giralt @archaeorg.bsky.social · 02/06/2025
After a few days of #fieldwork, we have already sampled 3 ethnographic sites and 1 abandoned camp. #Turkana people are really amazing! #Ethnoarchaeology #Kenya @camp-erc.bsky.social @sdrecercaupf.bsky.social
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ICArEHB @icarehb.bsky.social · 27/05/2025
📢 New publication: "The genomics of t’ef and finger millet domestication and spread" by Mekonnen D.Z., Gomes A.I., Machado R.S.R. & Oliveira H.R., in Philosophical Transactions of the Royal Society B: Biological Sciences (2025, Vol. 380, Issue 1926). 🔗 More info: doi.org/10.1098/rstb...
doi.org
The genomics of t’ef and finger millet domestication and spread | Philosophical Transactions of the Royal Society B: Biological Sciences
The Northern Highlands of Ethiopia and Eritrea (NHE) were a centre for food production in Africa, hosting one of the earliest agriculture-based complex societies on the continent. The NHE’s geographic...
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Abel Ruiz-Giralt @archaeorg.bsky.social · 27/05/2025
Yeah so... The view from the Turkana Basin Institute right there for you
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Abel Ruiz-Giralt @archaeorg.bsky.social · 27/05/2025
After about 48h, we are here!! TBI feels like paradise 🤩🤩 @camp-erc.bsky.social @sdrecercaupf.bsky.social
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Abel Ruiz-Giralt @archaeorg.bsky.social · 27/05/2025
On our way to Lake Turkana! 💥💥
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Abel Ruiz-Giralt @archaeorg.bsky.social · 26/05/2025
Cute Nairobi couple 🥰
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Abel Ruiz-Giralt @archaeorg.bsky.social · 25/05/2025
⚠️ @camp-erc.bsky.social fieldwork season starting! ⚠️ We're off to Kenya this time — expect stunning pics on your timeline soon! 🤩
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Annalee Newitz @annaleen.bsky.social · 27/04/2025
A massive study of 50,000 households over 1,000 archaeological sites provides ample evidence that inequality is not a "natural" outgrowth of sophistication. Instead, it is a political choice. Which means, kids, that we don't have to choose it. archaeologymag.com/2025/04/stud...
archaeologymag.com
New study reveals wealth inequality was never inevitable
A recent study published in the journal PNAS is overturning traditional wisdom regarding the origins and inevitability of wealth inequality
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Stéphanie Bodin 🌿🪵🔥🔬 @tifanosaurus.cpesr.fr · 24/04/2025
I contributed to the special issue of PAGES magazine, "Early Human Traces: Landscape Openness Proxies Across Space and Time," with a short article on the identification of charcoal from archaeological sites to detect human-induced vegetation openings 🪵🔥🌳🌴🌿 1/5 pastglobalchanges.org/publications...
pastglobalchanges.org
Using archaeological macrocharcoal to detect different degrees of anthropogenic landscape opening and woodland management | PAGES
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Lewis Fausak @lewisfausak.bsky.social · 19/04/2025
All the soils of the world put together in one image! They are categorized into their main defining traits. Do you have a favourite one?
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Rosalie Hermans @rosaliehermans.bsky.social · 17/04/2025
@amgc-vub.bsky.social @brusselsbioarch.bsky.social
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Enrico R. Crema @ercrema.bsky.social · 15/04/2025
Delighted that this paper came out as part of a PNAS special feature on “The Global Dynamics of Inequality over the Long Term” where together with a team of 27 scientists we collected and analysed a sample of over 53,000 houses from all five continents. www.pnas.org/doi/10.1073/...
pnas.org
Toward multiscalar measures of inequality in archaeology | PNAS
The Gini coefficient is a statistical measure commonly used to characterize distributions of socioeconomic quantities. Archaeologists and social sc...
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Stewie Stewart @stewiestewart.bsky.social · 09/04/2025
Also out in @nature.com today, our research showing that hunter-gatherers understook substantial Mediterranean sea crossings during the Mesolithic. This research also documents the first evidence of pre-Neolithic peoples in Malta! www.nature.com/articles/s41...
nature.com
Hunter-gatherer sea voyages extended to remotest Mediterranean islands - Nature
Archaeological discoveries from Malta suggest that humans were present on the Maltese islands from around 8,500 years ago, providing evidence that Mesolithic hunter-gatherers made sea crossings as lon...
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Laura Sánchez-Romero @lausanrom.bsky.social · 05/04/2025
Trunks #photography #nature
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Tom Higham @tommyhigham.bsky.social · 29/03/2025
We are happy to share our pre-print on dating bone using a novel non-destructive protocol we developed. The paper is on the Biorxiv here (Luftensteiner et al. 2025): www.biorxiv.org/content/10.1...
biorxiv.org
Non-destructive radiocarbon dating of bone
Since the 1950s, radiocarbon measurements have anchored archaeological chronologies dating back to 50,000 years, with bone collagen being a commonly dated material. Despite advances in collagen extrac...
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Nature @nature.com · 24/03/2025
Yohannes Haile-Selassie wants to shift the trajectory of palaeoanthropology in fossil-rich Ethiopia away from its long colonial heritage go.nature.com/4iEQTkE
go.nature.com
Why Africans should be telling the story of human origins
Yohannes Haile-Selassie wants to shift the trajectory of palaeoanthropology in fossil-rich Ethiopia away from its long colonial heritage.
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Abel Ruiz-Giralt @archaeorg.bsky.social · 12/03/2025
New article published in #ScientificReports! 🔥 In this paper, we use random survival forest to model the transition from foraging to plant cultivation globally. Check it out! www.nature.com/articles/s41...
nature.com
Environmental constraints and diffusion shaped the global transition to food production - Scientific Reports
Scientific Reports - Environmental constraints and diffusion shaped the global transition to food production
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Seth Abramson @sethabramson.bsky.social · 10/03/2025
In a world of Matts, be a Derek.
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Encarni Alfaro @encarnialfaro.bsky.social · 04/02/2025
Bifaz #Achelense #Prehistoria #Swanscombe, #Inglaterra Tallado sobre un Fosil de un Erizo de Mar del Cretacico. #HomoHeidelbergensis
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CAMP ERC UPF @camp-erc.bsky.social · 25/01/2025
Time to go home! Goodbye wonderful #Dhofar ! #fieldwork #ethnoarchaeology
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Carla Lancelotti @cl379.bsky.social · 25/01/2025
Deadline fast approaching! Consider submitting your work to our session on #archaology and #sustainability at #EAA2025. You have until Feb 6th! @archaeorg.bsky.social, Filippo Brandolini and @camp-erc.bsky.social
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Nature @nature.com · 24/01/2025
Roughly 6,000 readers answered our poll, with many declaring that Bluesky was nicer, kinder and less antagonistic to science than X go.nature.com/42tH8Ai
go.nature.com
Bluesky’s science takeover: 70% of Nature poll respondents use platform
Roughly 6,000 readers answered our poll, with many declaring that Bluesky was nicer, kinder and less antagonistic to science than X.
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Carla Lancelotti @cl379.bsky.social · 23/01/2025
And here they are! Today we found a beautiful #sorghum and #beans field in the mountains of #Dhofar near the Tawi Attair sinkhole....and close by what looks like an abandoned settlement! #FollowTheSorghum Thanks @camp-erc.bsky.social 😊
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Abel Ruiz-Giralt @archaeorg.bsky.social · 19/01/2025
Last days of sampling in #Dhofar...
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Abel Ruiz-Giralt @archaeorg.bsky.social · 18/01/2025
A well deserved day off from sampling which we spent exploring the Dhofari mountains around #Salalah, meeting with the locals and learning about traditional #pastoral practices 😁
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CAMP ERC UPF @camp-erc.bsky.social · 18/01/2025
Fieldwork soundscapes #ethnoarchaeology
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Stéphanie Bodin 🌿🪵🔥🔬 @tifanosaurus.cpesr.fr · 16/01/2025
nph.onlinelibrary.wiley.com/doi/full/10....
nph.onlinelibrary.wiley.com
Open letter: There are more than just trees and forests to be conserved and restored
Click on the article title to read more.
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Abel Ruiz-Giralt @archaeorg.bsky.social · 16/01/2025
Another day of #ethnoarchaeology in south #Oman. We are passed the 1000 samples and the dromedaries came to celebrate with us!!!!! 🐪🐪
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Abel Ruiz-Giralt @archaeorg.bsky.social · 15/01/2025
Hard day of #fieldwork against the Dhofari wind, but still lots of ethnoarchaeological samples coming home! We are almost at 800 now 😎 Fewer dromedaries today though, so I am using a photo of them crossing the lagoon a couple of days ago 🐪🌊
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Abel Ruiz-Giralt @archaeorg.bsky.social · 13/01/2025
Ethnoarchaeological sampling started in #Dhofar, south #Oman! Already 300 and counting.. (and some dromedaries)
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Carla Lancelotti @cl379.bsky.social · 12/01/2025
Although I am more of a #crop girl, I must say that there are some pretty animals to see while doing #fieldwork with CAMP....hopefully ther would be plants though 🤩🌾
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Abel Ruiz-Giralt @archaeorg.bsky.social · 12/01/2025
Today, we explored the area around the site of #Sumhuram and found some very nice #ethnographic sites that we will start sampling tomorrow! 💥💥 Also, dromedaries 😁 @camp-erc.bsky.social
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Abel Ruiz-Giralt @archaeorg.bsky.social · 11/01/2025
CAMP #fieldwork in Oman just started! Stay tuned for updates with cool ethnoarchaeological sites and some more pictures of dromedaries 🐪🤩 @camp-erc.bsky.social @cl379.bsky.social
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Abel Ruiz-Giralt @archaeorg.bsky.social · 06/01/2025
It's time! 👇🏼
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Jens Notroff @jensnotroff.com · 19/08/2023
From the archaeologist's sketchbook: Fifty Shades of Bronze.
Drawing containing fifty small rectangles in different yellowish to red to brown to green hues.
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Jason Gantenberg @jrgant.bsky.social · 11/12/2024
Had not realized that R (>=4.0, per StackOverflow) provides selective function loading. Nice way to avoid naming conflicts. Instead of barfing a package's entire namespace into your environment when you don't need to: library(stringr, include.only = c("str_extract", "str_remove")) #rstats
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Carla Lancelotti @cl379.bsky.social · 09/12/2024
Call for paper open! 2nd international Congress of Ecological Humanities to be held in #Barcelona at Universitat Pompeu Fabra #UPF on 30/06-01/07/2025 Main focus of this edition is the connection between Ecological Humanities and #PlanetaryWellbeing Send your contribution now! 👉 t.ly/0SzCT
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Abel Ruiz-Giralt @archaeorg.bsky.social · 05/12/2024
The call for contributions to the 27th #SAfA meeting has opened! This year it will be in Faro, Portugal (21-26 July 2025). Join us at session #11: Quantitative Approaches to African Ethnoarchaeology. You can submit your abstracts via: safa2025.icarehb.com @camp-erc.bsky.social @cl379.bsky.social
safa2025.icarehb.com
SAfA 2025 – Website for the 2025 Biennial Meeting of the Society of Africanist Archaeologists
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