Stone tools and animal bones show that early humans repeatedly used the Dmanisi area during the late Olduvai subchron. This provides key evidence that hominins were living in the southern Caucasus by about 1.85 million years ago, earlier than many older models of Eurasian settlement suggested.
At Dmanisi, fossil-bearing sediments lie on (and are bracketed by) volcanic deposits that can be dated with radiometric methods. This geological setting is central to why Dmanisi is treated as one of the best-dated early hominin sites in Eurasia.
Hominin bones and stone artifacts built up in Dmanisi deposits over a relatively short geological window. Multiple lines of dating place the main fossil-bearing levels around the 1.8 million-year range, with some sediments and artifacts spanning roughly 1.85–1.78 million years ago.
Archaeological excavations at the medieval ruins of Dmanisi exposed much older sediments containing a well-preserved early Homo mandible, labeled D211. This find signaled that very ancient hominins had been present in the Caucasus long before researchers expected.
Gabunia and Vekua published the Dmanisi mandible discovery and argued it belonged to early Homo. The paper drew wide attention because it implied an unexpectedly early human presence in western Eurasia.
Excavations produced two partial early Pleistocene crania from the same stratigraphic unit that had yielded the earlier mandible. These skull remains strengthened the case that Dmanisi preserved an early population of Homo outside Africa.
Researchers found a second mandible, D2600, from a slightly lower (and therefore older) layer than many other Dmanisi hominin fossils. The jaw’s size and robust features became important in later debates about how variable a single early Homo population could be.
A 2000 Science paper formally described Dmanisi’s early cranial fossils and emphasized their geological setting and age. This helped establish Dmanisi as a reference point for studying the earliest dispersals of Homo into Eurasia.
In 2001, the team uncovered a well-preserved cranium (D2700) and its associated jaw (D2735). Because the individual appears to have been young, Skull 3 expanded what scientists could infer about growth and variation in the Dmanisi group.
Dmanisi researchers recovered an unusual skull (D3444) from an older adult who had lost most or all teeth long before death. The specimen is often discussed as early evidence that group members may have helped an impaired individual survive.
An associated mandible (D3900) was found near the toothless skull (D3444), improving the anatomical picture of this individual. Together, the skull and jaw supported more detailed comparisons within the Dmanisi sample.
A remarkably complete adult cranium, later labeled Skull 5 (D4500), was found at Dmanisi. Its completeness made it one of the most informative early Homo skulls for studying facial shape, braincase size, and overall variation.
A 2007 Nature paper reported postcranial (non-skull) bones from Dmanisi, including limb and foot remains. These fossils helped show that the Dmanisi hominins combined some primitive traits with body proportions consistent with long-distance walking and dispersal.
A 2011 study in PNAS presented archaeological and geological evidence that pushed Dmanisi’s earliest occupations back to shortly after 1.85 million years ago and documented repeated site use through about 1.78 million years ago. This tightened the timeline for when early humans reached temperate Eurasia.
In 2013, researchers published the D4500 cranium together with the D2600 mandible as the first completely preserved adult hominin skull from the early Pleistocene. The paper argued that large differences among the Dmanisi skulls could fit within a single evolving lineage, fueling debate over how many early Homo species existed.
By the 2010s, Dmanisi was widely treated as one of the clearest early reference points for hominins outside Africa, dating to roughly 1.8 million years ago. Its combination of well-dated deposits, multiple individuals, and stone tools made it central to models of early dispersal routes into Eurasia via the Caucasus.
Homo erectus at Dmanisi, Georgia (c. 1.85–1.77 Ma)