Focus on Lepenski Vir and explain the abstract.
Lepenski Vir (Serbian Cyrillic: Лепенски Вир, "Lepena Whirlpool"), located in Serbia, is an important archaeological site of the Lepenski Vir culture (also called as Lepenski Vir-Schela Cladovei culture). It includes Mesolithic Iron Gates Hunter-Gatherers period and transition to Early Neolithic Early European Farmers period of the Balkans.The latest radiocarbon and AMS data suggests that the chronology of Lepenski Vir spans between 9500/7200–5500 BC, divided into Early-Middle Mesolithic, Late Mesolithic, Transition and Neolithic. There is some disagreement about when the settlement and culture of Lepenski Vir began, but the latest data indicates that it was between 9500-7200 BC. The late Lepenski Vir (6300–6000 BC) architectural phase saw the development of unique trapezoidal buildings and monumental sculpture, related with the admixing of Iron Gates Hunter-Gatherers with newly arrived Early European Farmers. The Lepenski Vir site consists of one large settlement with around ten satellite villages. Numerous piscine sculptures and peculiar architectural remains have been found at the site. 
Archaeologist Dragoslav Srejović, who first explored the site, said that such large sculptures so early in human history, and the original architectural solutions, define Lepenski Vir as a specific and very early phase in the development of European prehistoric culture. The site was notable for its outstanding level of preservation and the overall exceptional quality of its artifacts. Because the settlement was permanent and planned, with an organized societal life, architect Hristivoje Pavlović labeled Lepenski Vir as "the first city in Europe".The Đerdap national park, which includes Lepenski Vir, was established in 1974. On 10 July 2020, the park's wider area was designated a UNESCO global geopark. Apart from the Iron Gates  gorge, the Đerdap UNESCO Global Geopark includes parts of the Miroč and Kučaj mountain massifs, with total area of 1,330 km2 (510 sq mi), and was the first such designation in Serbia.
Serbia Iron Gates Hunter-Gatherers trapezoidal Đerdap national park Dragoslav Srejović Miroč Early European Farmer radiocarbon Iron Gates UNESCO global geopark Hunter-Gatherers archaeological site architectural Iron Gates  Europe Kučaj Mesolithic Balkans mountain massif Early European Farmers Neolithic