Unearthing Ancient Layers: The Buhais Rockshelter's Role in Early Human History
The Buhais Rockshelter in Sharjah's Faya Palaeolandscape stands as a testament to humanity's deep roots in the Arabian Peninsula. Nestled within a limestone formation, this natural shelter has preserved stratified sediments up to 1.7 meters deep, offering a rare window into prehistoric life. Recent excavations have illuminated repeated human occupations spanning tens of thousands of years, reshaping our understanding of how early populations navigated arid landscapes.
Discovered as part of ongoing surveys by the Sharjah Archaeology Authority (SAA), the site complements nearby Jebel Faya, known for evidence of human activity dating back over 200,000 years. Together, these locations form one of southeastern Arabia's most significant archaeological clusters, highlighting the UAE's pivotal position in tracing human dispersal out of Africa.
Historical Context: From Jebel Faya to Buhais Rockshelter
Prior to this study, archaeological records from Jebel Faya established human presence in Sharjah around 125,000 years ago during a wetter Marine Isotope Stage 5. However, a notable gap existed between approximately 60,000 and 12,000 years ago, coinciding with the Last Glacial Maximum's extreme aridity. Researchers assumed the region became largely uninhabitable, with populations retreating or perishing.
The Buhais Rockshelter bridges this void. Initial discoveries in 2017 hinted at Paleolithic layers, but systematic digs since then, under the STEPPS project, have yielded a continuous sequence. This builds on decades of SAA-led work, transforming Sharjah into a hub for prehistoric research in the Gulf region.
The International Research Team Behind the Breakthrough
Led by Eisa Yousif, Director-General of SAA, and Dr. Sabah Jasim, SAA Advisor, the team includes academics from leading institutions. Dr. Knut Bretzke from Friedrich Schiller University Jena (Germany) coordinated fieldwork, while Professor Adrian Parker from Oxford Brookes University (UK) analyzed paleoenvironments. Contributions came from the Universities of Tübingen and Freiburg, underscoring a collaborative effort blending UAE heritage preservation with global expertise.
This partnership exemplifies how UAE-based initiatives foster international academic ties. SAA's role not only funds excavations but also ensures findings contribute to UNESCO-recognized sites like Faya Palaeolandscape, inscribed in 2025. Such collaborations elevate UAE's profile in archaeology, attracting scholars worldwide.
Excavation Methods: Luminescence Dating and Stratigraphy
Excavators employed optically stimulated luminescence (OSL) dating, measuring when sediments were last exposed to sunlight. This technique, ideal for arid contexts lacking organic material for radiocarbon, provided precise ages for layers containing stone tools. Systematic sieving and 3D mapping preserved context, revealing four distinct occupation horizons.
- Layer dating to ~125,000 years ago: Earliest tools linked to Middle Stone Age technologies.
- ~59,000 years ago: Post-Toba eruption phase.
- ~35,000 years ago: Late Pleistocene adaptation.
- ~16,000 years ago: Terminal Pleistocene return.
Pollen analysis and faunal remains reconstructed local ecosystems, showing pulses of humidity amid regional desiccation.
Artifacts Uncovered: Tools of Hunter-Gatherers
Levallois flakes, cores, and scrapers dominate assemblages, indicative of sophisticated knapping techniques. These Middle Paleolithic tools suggest Homo sapiens skilled in resource extraction from sparse environments. Rare finds like ochre hint at symbolic behavior, while animal bones reveal hunting of gazelle and small game.
Absence of hearths in some layers points to short-term camps, yet sediment stability preserved fragile evidence. Comparative analysis with Faya tools shows technological continuity, implying population persistence or recurrent migrations.
Paleoenvironmental Insights: Surviving Arid Arabia
Proxy data indicate occupations aligned with 'green Arabia' phases—brief wet intervals from Indian Ocean monsoons. Pollen spectra show grasses and shrubs, supporting herbivores and drawing humans to oases or wadis. Isotope studies on shells confirm groundwater upwellings, challenging uniform aridity models.
This resilience highlights adaptive strategies: mobility tracking resources, exploiting refugia. Buhais demonstrates Arabia's role as a dynamic corridor, not barrier, in human expansion.
Challenging Old Theories: No Abandonment in Ice Age Arabia
Previously, models posited depopulation post-70 ka due to hyperaridity. Buhais evidence refutes this, proving repeated returns. As Dr. Bretzke notes, local variability—springs, vegetation—sustained life, urging revised migration timelines.
Implications extend to global prehistory: strengthens 'southern route' out-of-Africa hypothesis, positions Arabia central to Homo sapiens diversification.
Sharjah Archaeology Authority: Pillar of UAE Research
SAA's proactive digs, museums like Buhais Geological Park, position Sharjah forefront UAE heritage. Dh2 million Faya grants fund future work, partnering universities. This boosts local capacity, training Emirati archaeologists.Sharjah Archaeology Authority
In higher education context, SAA collaborations with intl unis offer fieldwork opportunities, enhancing UAE academic offerings in anthropology, geoarchaeology.
Global Academic Collaborations Elevating UAE Science
Univ Jena's Bretzke praises site's potential; Oxford Brookes' Parker integrates paleoecology. German unis contribute OSL expertise. These ties mirror UAE's vision: world-class research hubs.
UAE universities like those in Sharjah could expand programs, hosting exchanges. Publication in Nature Communications amplifies visibility, attracting funding, talent.
Future Prospects: Expanding the Faya Narrative
Ongoing STEPPS, SAA plans target unexplored layers, DNA analysis. Climate models refined via Buhais data aid predictions. UNESCO status ensures protection, tourism blending education-heritage.
For academics: theses, postdocs on Arabian prehistory. UAE's stable funding, intl nets position it leader desert archaeology.
Broader Impacts: Human Adaptation and Modern Lessons
Buhais underscores resilience: early humans thrived via opportunism. Parallels today's climate challenges—aridification, migration. UAE's preservation models inspire global heritage management.
Eisa Yousif emphasizes: not mere passage, but sustained landscape. This enriches UAE identity, fostering pride, STEM interest among youth.
