The first comprehensive scientific analysis of imposing stone blocks in Stonehenge revealed the secret of great weather resistance
Scientists studied key samples from one of the sarseni, Stone 58, taken during conservation work in the 1950s.
That block has been held in the United States for decades and returned to Britain in 2018 for additional analysis.
Sarseni is built of so-called “silk” that was gradually formed within a few meters of the earth’s surface as a result of groundwater circulating through underground sediments.
Silkrit is hardened (crumb-resistant) soil that forms when molten silicon dioxide cements the surface of soil, sand, and gravel.
The research results showed that the core consists mainly of quartz grains the size of strongly cemented sand with cross-quartz crystals.
Extremely resistant, durable and long-lasting quartz does not decompose or corrode even when exposed to atmospheric conditions for thousands of years.
“This explains the resistance of rocks to atmospheric influences and why it is an ideal material for building monuments,” said geomorphologist David Nash of the University of Brighton, who led the research published in the journal PloS ONE.
The stone analyzed 58 is seven meters high, with two more meters buried in the ground, and the upper part weighs about 24 tons.
The main model is in the form of a stone stick 2.5 centimeters wide and about one meter long, beige which is lighter than the light gray outer part of the megalith.
The study method was performed using research methods, CT scan, X-ray, microscopic analysis and many technical analyzes of geochemistry.
“The sample used is currently the most analyzed rock after the Martian rocks,” Nash said.
Archaeologists believe that the perpendicular stones were erected around 2500 BC and 2000 BC although the stomi and perimeter grooves, which constitute the earliest stage of the monument, date back to around 3100 BC The stones weigh about 13 tons each and were transported for several kilometers.
The site and its surroundings are part of the UNESCO World Heritage List since 1986, and is under the protection of the Scheduled Ancient Monument.
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