Caves of the Fem: a 30-day dig rewrites what we know about Europe's last hunter-gatherers

On 28 June 2026, the last trowel came out of the Coves del Fem. For twenty-nine working days before that, a small team of archaeologists had been climbing the limestone benches above Ulldemolins, in Catalonia's Priorat comarca, and squeezing through a fissure into a cave system that may now force a rewrite of how Europe's last hunter-gatherers met Europe's first farmers.

The site is not new. Local speleologists and the Institut Català de Paleoecologia Humana i Evolució Social (IPHES) have known about it for years. What the May-to-June 2026 field season has produced, according to a write-up carried by Phys.org on 15 July, is the first properly stratified sequence at the cave that puts Mesolithic foragers and Early Neolithic farming groups in the same sediment column, separated not by centuries of abandonment but by a thin, datable horizon of hearth ash and discarded bone.

A cave that did not empty out

For decades the textbook story of the Iberian transition has been one of replacement: incoming farming populations from the Mediterranean coast push inland, the indigenous foragers fade into the hinterland or simply vanish from the archaeological record, and a new economic regime takes hold within a few centuries. The new Fem material complicates that picture. The excavators report layers in which lithic industries of Mesolithic type sit directly underneath pottery-bearing Neolithic deposits, with no sterile gap between them. The implication, taken at face value, is that the same shelter was in continuous use by communities that were doing fundamentally different things for a living.

The Serra de Montsant setting matters. The natural park sits roughly forty kilometres inland from the coast, on the flanks of the Montsant range, in terrain that a forager with a bow would have found extremely productive and that a beginner-farmer with no experience of local soils would have found hostile. The fact that Neolithic groups reached into this interior at all, and apparently arrived without erasing the forager presence already there, suggests a more negotiated process than the older frontier-and-replacement model allowed.

What the diggers actually pulled out

A field season of four weeks is short by archaeological standards, and the team has been careful not to over-claim. Phys.org's summary lists the diagnostic categories: lithic assemblages attributable to the Late Mesolithic, including small geometric microliths of the kind associated with arrow and projectile armatures; faunal remains dominated by wild ibex and red deer; ceramic sherds bearing impressed-cardial decoration, the signature of the Early Neolithic across much of the western Mediterranean; and, crucially, a sequence of radiocarbon samples taken from hearth contexts that the team expects to publish in a peer-reviewed venue later in 2026.

Two findings are doing the most analytical work. The first is a hearth feature that sits stratigraphically between the forager and farmer horizons, with ash and burnt bone that the excavators read as evidence of repeated, structured fire use at the exact moment of demographic and economic overlap. The second is the recovery of grinding stones and cereal grain impressions in a layer that also contains wild-game remains, hinting at a mixed economy in the transition phase rather than a clean break.

Why the older story is wobbling

The replacement model never lacked critics. Work at sites along the Portuguese Tagus, in the Ebro valley, and at the famous Cueva de los Murciélagos in Andalusia had already been pushing the field toward a slower, messier, more locally contingent version of the transition. What the Fem material adds is a well-stratified inland anchor in a region where the evidence had been thin, and a chronology that should be precise enough to test directly against the coastal sequences.

The bigger structural point is methodological. A cave that yields both forager and farmer material in clean superposition lets researchers ask questions that surface scatters cannot: how long did the two groups overlap, what did they eat in the overlap window, did they share toolkits, and what happened to the forager lithic tradition once the ceramic-bearing layer became dominant. Each of those questions is now answerable, in principle, from a single column of dirt.

What we do not yet know

The honest limits of the 2026 season are easy to list. Radiocarbon dates have been taken but not yet reported, so the absolute spacing between the Mesolithic and Neolithic horizons is unconfirmed. The total excavated area is modest, and taphonomic work on the faunal assemblage, which would tell us whether the game was hunted locally or brought in from elsewhere, has barely begun. The team has also not yet published the full lithic typology, which is the category of evidence most likely to be re-litigated by specialists in the coming year.

There is also a question the sources do not address: whether the Coves del Fem sequence will turn out to be exceptional or representative. The Priorat is a long way from the coastal cardial Neolithic heartland, and a single inland site, however well stratified, is a single data point. The next field seasons, and the dating program now underway, will determine whether the cave is a model for the interior transition or a curiosity.

For now, the headline is narrow and defensible. Inside a Catalan natural park, beneath a thin layer of ash, a team has found the first stratified evidence that the people who hunted ibex in the Serra de Montsant were still there when the people who grew wheat and stamped cardial pottery moved in. The neat frontier between forager and farmer Europe, drawn on textbook maps for half a century, is starting to look like the kind of line that exists more clearly in print than in the ground.

Desk note: the wire covered this as a single-source field report; Monexus frames the Fem find inside the longer-running Iberian Neolithic debate, where the replacement model has been under pressure for two decades, and flags the dating program still to come.