Boards split 10,500 years ago came up from a German lake bed

Harald Meller, Saxony-Anhalt’s state archaeologist, says wood lifted from the sediments of Lake Arendsee “shed a completely new light on the Mesolithic period.” The timber is about 10,500 years old and includes boards that were split from logs. It was recovered by the State Office for Heritage Management and Archaeology Saxony-Anhalt, working with Fraunhofer IOSB-AST.

The announcement came on October 2, 2026. The wood is a post and a set of split boards, and what people built with them is still unknown.

Boards, a post and the marks of felling

The finds are described by Archaeology magazine as Mesolithic lumber: one wooden post about five feet long with felling marks, and split boards up to roughly four feet in length. The report gives no count of boards, no tree species and no water depth, so the size of the assemblage and the conditions of its recovery are still unpublished.

Meller’s full remark gives the reason the wood matters: it “shed a completely new light on the Mesolithic period, for which traces of buildings in central Germany have so far only been known in the form of soil discolorations.” Wood rots away on dry land, and archaeologists have had to infer Mesolithic buildings from stains where posts once stood. Timber that survives in lake sediment gives them the material itself. What the wood was for is unknown. The report says it is not yet known whether the timber was used to build huts or an unidentified structure, and a post with felling marks next to boards split from logs is consistent with either.

The 10,500-year date and what it covers

The figure is stated as “about 10,500 years,” and the coverage reviewed does not name the dating method, whether radiocarbon or another technique. The age belongs to the wood. The felling marks and the splitting were done on trees of that age, so the working is read as belonging to the same period, but the report does not give separate dates for the felling and the splitting and gives no margin of error.

A date near 10,500 years before the present sits in the early Holocene, after the end of the last ice age, when hunter-gatherers still lived across northern Europe. Marcel Weiß of the Saxony-Anhalt state office is quoted as saying the finds bear on understanding those hunter-gatherers and the origins of the cultural landscape. Weiß and Meller both speak for the office that holds the material, and no outside specialist is quoted in the report.

Sonar, the old shoreline and earlier Arendsee finds

Recovery is continuing as survey work. Researchers, including those from Fraunhofer IOSB-AST, are carrying out high-resolution sonar scans to map the ancient shoreline and to plan further underwater investigations. The institute’s own site lists an underwater robotics department, though it describes work in infrastructure inspection and water management rather than archaeology, so its role here is mapping and not excavation.

Underwater work at the lake has been under way for months. Volksstimme’s August 2026 report names archaeologists Sven Thomas and Marcel Weiß as the investigators and mentions wood and stones on the lake floor, with a larger mission planned for September. The paywalled article does not describe the finds in detail, so it cannot be tied to the Mesolithic boards, but it shows the same team was working at the site weeks before the announcement.

The lake has produced finds before. Volksstimme reported divers and robots turning up a wooden boat, stones from the monastery and fish weirs in other parts of Arendsee, objects the unusual structure of the lake bed had preserved, and all far younger than the Mesolithic wood.

Elsewhere in Saxony-Anhalt, Mesolithic sites have come down as stone and bone. A hunting camp at Dehlitz, about 9,000 years old and excavated in 2023, yielded stone implements, microliths and bone and antler fragments, according to an idw press release, and no timber. Against that record, wood with felling marks and splitting is a different kind of evidence, one that records how people handled trees as well as what they hunted.

Split wood is old in Germany, though not this old. A University of Göttingen release on Schöningen, in Lower Saxony, reports at least 20 spears and throwing sticks from about 300,000 years ago and describes a splitting technique used to make smaller sharp implements; Earth.com’s coverage of the same study calls it the first concrete evidence of pre-Homo sapiens engagement in complex woodworking and wood splitting. The Arendsee boards are therefore not the oldest split wood in the country, and the report does not claim they are. Their claim is about context: Mesolithic worked timber from central Germany, in the form of boards, where earlier evidence of buildings was limited to stains in soil.

No excavation date, report or paper accompanied the announcement.

This article was produced with the assistance of AI and reviewed by Morning Overview editors prior to publication.

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