Archaeology
Nazca geoglyphs discovered used AI deep learning
Archaeologists from the Yamagata University have used AI deep learning to discover new geoglyphs in the northern part of the Nazca Pampa in the arid Peruvian coastal plain.
Geoglyphs in the Nazca Pampa were first identified during the 1920’s, with ongoing studies since the 1940’s revealing various figurative geoglyphs of zoomorphic designs, geometric shapes, and linear lines.
Geoglyphs can be categorised into three main types: figurative, geometric, and lineal. Archaeologists suggest that the lineal geoglyphs were created by the Nazca, a culture that developed during the Early Intermediate Period and is generally divided into the Proto Nazca (phase 1, 100 BC to AD 1), the Early Nazca (phases 2–4, AD 1 to 450), Middle Nazca (phase 5, AD 450 to 550) and the Late Nazca (phases 6–7, AD 550 to 750).
The relief type dates from the Late Formative period (400 to 200 BC), as the iconography of the geoglyphs are similar to that of Formative petroglyphs found on outcrops of rock. During this period, the region was inhabited by the Paracas Culture, an Andean people that emerged around 800 BC until 100 BC.
Since 2004, Yamagata University has been conducting geoglyph distribution surveys using satellite imagery, aerial photography, airborne scanning LiDAR, and drone photography to investigate the vast area of the Nazca Pampa covering more than 390 km2.
In 2016, the researchers used aerial photography with a ground resolution of 0.1 m per pixel to create a detailed survey of the region. Overtime, the team have identified various geoglyphs, however, the process is very time consuming, so they have adopted AI deep learning to analyse the photographs at a much faster rate.
The results of a study, published in the Journal of Archaeological Science, has revealed the discovery of four new Nazca geoglyphs using this new method by creating an approach to labelling training data that identifies a similar partial pattern between the known and new geoglyphs.
The four new geoglyphs depict a humanoid figure, a pair-of-legs, a fish, and a bird. The humanoid geoglyph is shown holding a club in his/her right hand and measures 5 metres in length. The fish geoglyph, shown with a wide-open mouth measures 19 metres, while the bird geoglyph measures 17 metres and the pair-of-legs 78 metres.
According to the study authors: “We have developed a DL pipeline that addresses the challenges that commonly arise in the task of archaeological image object detection. Our approach allows DL to learn representations of images with better generalisation and performance, enabling the discovery of targets that have been difficult to find in the past. Moreover, by accelerating the research process, our method contributes to archaeology by establishing a new paradigm that combines field surveys and AI, leading to more efficient and effective investigations.”
https://doi.org/10.1016/j.jas.2023.105777
Header Image Credit : Yamagata University
Archaeologists excavating at the ancient Tharsa necropolis have uncovered a Roman Era tomb guarded by two carved bull heads.
Tharsa is located near Kuyulu village in southeastern Turkey along the Adıyaman-Şanlıurfa Highway.
The site was situated on a major Roman highway from Doliche to Samosata, which today consists of a two settlement mounds and a large necropolis that dates from the 3rd century to the Byzantine period.
Excavations first commenced in 2021 which discovered a collection of Turuş Rock Tombs, a type of tomb construction carved directly into the bedrock.
In the latest season, archaeologists have excavated another Turuş Rock Tomb, however, this example was found to have two carved bull heads which is decorated with garlands and rosettes between the horns.
Bull heads, known as Bucranium, were a form of carved decoration commonly used in Classical architecture. In Ancient Rome, bucrania were often used on the friezes of temples in the Doric order of architecture, later influencing the architecture of buildings from the Renaissance, Baroque, and Neoclassical periods.
Architectural examples of bucrania are representations of the practice of displaying garlanded, sacrificial oxen, whose heads were displayed on the temple walls.
Like similar Turuş Rock Tombs, the bull heads are carved directly into the bedrock, guarding a dozen rock cut steps descending into the burial chamber which has three arched niches known as acrosolia.
Mustafa Çelik, Deputy Director of Adıyaman Museum, said, “Tharsa Ancient City consists of 3 main archaeological areas: Big Mound, Small Mound and Necropolis Area. We started excavations in the necropolis area in 2024. We added 2 more rock tombs to the rock tombs we had previously uncovered. One of them is the rock tomb we identified today.”
Header Image Credit : Adıyaman Museum
Sources : Adıyaman Museum
This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily
Archaeologists excavating at Colonial Williamsburg have discovered a barracks for soldiers of the Continental Army during the American War of Independence.
Colonial Williamsburg is a living-history museum that forms part of the historic district in the city of Williamsburg, Virginia.
Williamsburg was the capital of the Virginia colony from 1699 until 1779, founded by English settlers during the Second Anglo-Powhatan War (1622–1632).
Tensions with England mounted over fundamental civil and economic rights for the colonists, resulting in the American Revolution and the American War of Independence.
Image Credit : Colonial Williamsburg
Archaeologists excavating next to the museum’s visitor’s centre uncovered foundations of a barracks that could accommodate up to 2,000 soldiers from the Continental Army and up to 100 horses.
“We have horseshoes,” said Jack Gary, Colonial Williamsburg executive director of archaeology. “We also have this object here which is a snaffle bit, so it’s part of a horse bit that goes in the mouth to control the horse. And this object here is part of a curry comb for brushing down the horse’s coat.”
Excavations have so far unearthed only a small part of the complex, but experts suggest that it covered roughly three to four acres.
The barracks were known from Eighteenth-century maps and other historical documents, but until now, the exact location of where it existed within the colony interior was unknown.
According to the historical sources, the barracks were built between 1776 and 1777, and were later destroyed by fire in 1781 by soldiers of the British Army under the command of General Cornwallis.
Excavations also uncovered mid-1700 chimney bases, ceramics, gun flint, coins, musket balls, military buckles, and items of decorative jewellery worn by high-ranking officers as cufflinks.
An interesting discovery are examples of lead shot with indications of tooth-marks, suggesting that the soldiers chewed on the lead shot because it tasted sweet.
Header Image Credit : Colonial Williamsburg
Sources : Colonial Williamsburg
This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily
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