The SASQUA congress will kick off next week (19-24 May 2024) in Cango Valley (South Africa). Sessions cover many aspects of Quaternary science and range from archaeology through palaeoclimate to geological topics. The full program is now available to download.
Quick, L.J & Asithandile, N. (2024) Proceedings of the XXIV Biennial Congress of the Southern African Society for Quaternary Research (SASQUA), Cango Valley, South Africa, 19-24 May 2024. DOI: 10.5281/zenodo.11125697
To find out more about the meeting and other SASQUA activities you can also visit the organizations web pages: https://sasqua.co.za/
The 17th online Mapping Ancient Africa seminar took place on Thursday 16 May 2024. The seminar was delivered by N’dji dit Jacques Dembele and was entitled “Evidence of recent seismicity in the West African Craton: The Bamako seisemites Mali”. In the seminar surprising new evidence for Quaternary seismic activity within the West African Craton – which was thought to be tectonically stable – was presented. Specifically, the identification of clastic dykes and deformation within sedimentary and lacustrine deposits was used to suggest past high magnitude earth quakes in the last 170,000 years.
Alfred Houngnon was awarded an INQUA Fellowship in 2024 to develop his work on past environmental change in the Dahomey Gap (western Africa). Through the project Alfred is making a series of videos about his fellowship journey. In the first video Alfred introduced his project and collaborators (click here to watch the first part). In the two latest instalments (below) Alfred explains: (i) one of his key methodological approaches (modern pollen trapping), and (ii) the modern vegetation of the region and current threats to the vegetation.
The next Mapping Ancient Africa seminar will take place online at 17:00 CEST on 16 May 2024.
Speaker: N’dji dit Jacques Dembele (President of WAQUA, Université des sciences sociales et de gestion de Bamako, Mali)
Title: Quaternary period seismicity on the West African Craton
The seminar will be delivered via Zoom. The link for the seminar can be obtained from the MAA Slack channel or by contacting the chair of this seminar (Stefanie Kaboth-Bahr). If you want to know more about the Mapping Ancient Africa project visit our web pages and please do not hesitate to get in contact if you want to get involved.
The 16th Mapping Ancient Africa seminar took place online on Friday 12th April 2024. The seminar was delivered by Stéphanie Bodin (Senckenberg Research Institute and Natural History Museum Frankfurt). In the seminar Stéphanie demonstrated how the examination of ancient charcoals found in caves used for shelter by hunter-gather populations living in Ethiopia at the end of the African Humid Period (4,000-2,000 years ago) can provide insights into vegetation and human selection of woody resources.
Developing new applications for plant wax n-alkane biomarkers can deepen our understanding of ecosystem history. In this thesis I study modern and sedimentary n-alkane signals, sourced along the tropical Andes, to better understand how they can be used as a proxy for past environmental change. The overarching question addressed in this thesis is: what do n-alkane patterns extracted from sedimentary records reflect? Specifically, I address:• Do environmental or taxonomic factors dominate the n-alkane signal?• Does the n-alkane signal alter as the plant material degrades?• How much of the n-alkane variability can be explained by our analytical protocols?I find that the taxonomic and environmental signals of n-alkane patterns are entangled, especially in leaf n-alkanes. Soil n-alkane patterns reflect environmental conditions at the site, but the results cannot rule out a taxonomic signal in soil n-alkane patterns. I also find that, as the source material degrades (leaves), the n-alkane patterns are altered. Although the n-alkane signal is recognizable as having plant origin, there is a reduction in n-alkane pattern variability and the metric for degradation becomes an increasingly important descriptor of the n-alkane pattern shifts observed in soils and sediments. I find evidence that the metric for degradation can be used as proxy for past environmental change, but the application of this n-alkane signal proxy is not straightforward. Finally, I find there is little understanding of how much extraction and measurement protocols contribute to the n-alkane pattern variability and what implications this has on interpretations of the n-alkane signal.
The Mapping Ancient Africa (MAA) special issue of Quaternary International (QI) will open for submission on 30 April and will close 30 July 2024. To submit your article go to the QI submission portal and click “submit new article”, you will then be asked to “select article type”. From the drop down list select “SI: Mapping Ancient Africa”. This will ensure that your manuscript is directed to the guest editorial team. Submissions should follow the standard QI guideline (click here for details) and take account of the advice for submission to this special issue (click here for details).
The special issue is centered around work and papers presented in the MAA Rome workshop and sessions at the INQUA Rome congress (session 1, session 2), however, if you have a manuscript that you think would be appropriate for inclusion given the research themes of the project please also consider submitting. If you have any questions feel free to contact the editorial team in advance.
Using phytolith analysis to detect palm enrichment in AmazoniaNina Witteveen (University of Amsterdam)
Starch grains as indicators of plant food consumption in Neanderthals and Early Modern HumansAmanda Henry (University of Leiden)
Paleoenvironmental history of an archaeological lagoon in Central Italy: Insights from diatom analysisMajoi Nacimiento, Teye Aukes & Jan Sevink (University of Amsterdam)
15:45-17:30 – Laboratory activities
Advances in topical phytolith identificationNina Witteveen (University of Amsterdam)
Finding Suitable Grounds – combining the on/off site approach through phytolith investigation in FlevolandAna Smuk (Rijksuniversiteit Groningen)
The next Mapping Ancient Africa seminar will take place online at 17:00 CEST on 12 April 2024.
Speaker: Stéphanie Bodin (Senckenberg Research Institute and Natural History Museum Frankfurt)
Title: Hunter-gatherers and Afromontane vegetation in the Ethiopian highlands since the end of the African Humid Period
Related publication:
Bodin, S.C., Neumann, K., Hensel, E.A., Vogelsang, R., Demissew, S., Casas-Gallego, M. & Hahn, K. (2024) Afromontane forests and human impact after the African Humid Period: wood charcoal from the Sodicho rock shelter, SW Ethiopian highlands. Vegetation History and Archaeobotany. DOI: 10.1007/s00334-023-00977-3
Casas-Gallego, M., Hahn, K., Neumann, K., Demissew, S., Schmidt, M., Bodin, S.C. & Bruch, A.A. (2023) Cooling-induced expansions of Afromontane forests in the Horn of Africa since the Last Glacial Maximum. Scientific Reports13, 10323. DOI: 10.1038/s41598-023-37135-8
The seminar will be delivered via Zoom. The link for the seminar can be obtained from the MAA Slack channel or by contacting the chair of this seminar (William Gosling). If you want to know more about the Mapping Ancient Africa project visit our web pages and please do not hesitate to get in contact if you want to get involved.
Ecology of the past 