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Romans were early pioneers of recycling

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A study using gold impurities in silver coins and lead pollution in Greenland ice suggests that the Romans were early pioneers of recycling.

The process of extracting silver from ores and the refining at mints results in high volumes of lead pollution. During antiquity, this pollution entered the atmosphere, and drifed across the Atlantic leaving a “pollution fingerprint” in the Greenland ice.

The study, published in the journal Archaeological and Anthropological Sciences, highlights a significant reduction in lead pollution levels in the ice during the late Roman Republic, despite the continued production of coins.

The likely cause was a period of conflict during the first and second centuries BC, when Rome’s access to silver mines in Iberia and southern France was interrupted.

Deliberate debasement of the denarii (the predominant silver coin of the Romans) with copper is often considered to show interruptions in silver production. Yet, despite slight dips in the fineness of silver coins (especially around the times of the Social and Civil Wars in the first century BC), this does not provide enough of an explanation for the drops in lead pollution.

In elucidating this occurrence, Dr. Jonathan Wood and Dr. Matthew Ponting, researchers from the University of Liverpool, attribute it to the Romans’ practice of recycling silver, frequently acquired through post-conflict looting in Iberia and southern France for coin production.

According to the researchers: “At around 120 BC clusters of coins began appearing with very low levels of gold in them. The silver used for these coins also appears to have become part of the silver supply for coinage in the first half of the first century BC. Then, in 49 BC, a new infusion of silver with high levels of gold in it appears to enter circulation. Given that Julius Caesar returned to Rome from his battles with the Gauls in 49 BC, the researchers propose that this new silver in circulation was plundered by Caesar’s army.”

Dr Jonathan Wood said: “Debasing silver was one way to deal with fluctuations in the silver supply. Melting down existing silver, either yours or someone else’s, was another. For the Romans, recycling coins would have been considerably less expensive than extracting new silver – a benefit for their finances, as well as for the environment.”

University of Liverpool

https://doi.org/10.1007/s12520-023-01854-w

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Archaeology

Archaeologists excavate medieval timber hall

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Archaeologists from the University of York have returned to Skipsea in East Yorkshire, England, to excavate the remains of a medieval timber hall.

Recent excavations unearthed a timber hall measuring 5 metres wide by 16 metres long, which was surrounded by a large ditched enclosure.

The size and shape of the hall is marked by post holes, which the team plan to excavate further to provide new insights into the hall’s purpose and setting in the surrounding landscape.

The hall sits adjacent to a 13-meter-high mound, once presumed to be a motte and bailey castle. However, carbon dating has since revealed its age to be 1,500 years prior to the Norman Conquest era from during the Iron Age.

Dr Jim Leary, from the University of York’s Department of Archaeology, said: “The unearthing of timber buildings dating to the period between the collapse of the Roman Empire and the arrival of the Vikings, a time often referred to as the Dark Ages, is an incredibly rare and significant find.

“The discovery at Skipsea is particularly interesting because we know that the area was in the hands of the last Anglo-Saxon King of England, Harald Godwinson, and then later, after the Norman Conquest of 1066, it became the estate centre of the Lords of Holderness.”

Skipsea was once home to three freshwater lakes, Skipsea Bail Mere, Skipsea Low Mere, and Skipsea Withow Mere, linked to the River Hull through a network of tributaries. These lakes (long-vanished), began 10,000 years ago during the Mesolithic period, and continued into the medieval period.

The lakes were a constant draw to population groups throughout history, which has provided archaeologists with Mesolithic stone tools, animal remains, bone harpoons, and Bronze Age buildings and trackways.

Header Image Credit : University of York

Sources : University of York

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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Archaeology

Archaeologists find traces of Gloucester’s medieval castle

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Archaeologists from Cotswold Archaeology have uncovered traces of Gloucester’s medieval castle in Gloucester, England.

The castle was first constructed during the Norman period as a simple motte and bailey. Over the centuries, various additions and periods of reconstruction extended the footprint of the castle, which by the 13th century became a royal residence for nobility and English kings.

Between the 15th century and 17th century, the castle went into decline and much of the stonework from the fortifications were used to construct roads and buildings within the city centre, leaving only the keep which was used as a gaol (prison).

In time, the keep was considered to be unsuitable and its demolition began in 1787, leaving no visible remains of the castle.

Image Credit : Cotswold Archaeology

During development works in the south-west of Gloucester city centre, archaeologists from Cotswold Archaeology have uncovered traces of the castle beneath the basketball court of the former HMP Gloucester.

A number of trenches revealed medieval structural remains that archaeologists have interpreted as forming part of a masonry causeway or bridge structure. This provided access to the castle across its inner defensive ditch and continued north-east onto Castle Lane.

Excavations also found subsequent demolition and robbing of stonework, evidenced by the infilled castle ditch, and comprised cultivation soils of the Castle Gardens, which occupied this area from the later 18th century through to the mid-19th century.

In addition, a stretch of Post-medieval wall relating to the gardens was identified, which corresponds to a boundary shown on early and mid-19th century maps.

According to the archaeologists: “The results highlight that significant archaeology continues to survive at a relatively shallow depth, enabling us to trace historic land use and landscape change within this part of the city across many centuries.”

Header Image Credit : Cotswold Archaeology

Sources : Cotswold Archaeology

This content was originally published on www.heritagedaily.com – © 2023 – HeritageDaily

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