Keyword: rhyolite
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Professor Peter Donnelly, of Oxford University, said the Welsh carry DNA which could be traced back to the last Ice Age, 10,000 years ago. The project surveyed 2,000 people in rural areas across Britain. Participants, as well as their parents and grandparents, had to be born in those areas to be included in the study. Prof Donnelly, a professor of statistical science at Oxford University and director of the Wellcome Trust centre for human genetics, said DNA samples were analysed at about 500,000 different points. After comparing statistics, a map was compiled which showed Wales and Cornwall stood out. Prof...
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The genetic makeup of Europe mysteriously transformed about 4,000-5,000 years ago, researchers have discovered. An Australian team found the unexplained change while analysing several skeletons unearthed in central Europe that were up to 7,500 years old. They say the rapid expansion of the Bell Beaker culture, which is believed to have been instrumental in building the monoliths at Stonehedge, could hold the key.
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An archaeologists analysis on how the construction of megalithic monuments in Atlantic Europe are not restricted to a single purpose, nor how they reflect one aspect of the community that built them... well-rounded evidence for practical and symbolic components of the early agricultural lifestyle within the Neolithic. Depictions in the architecture of these structures explore complex symbolism and the socio-ritual interactions where monuments offer places for gatherings... Megalithic monuments of Atlantic Europe have long attracted attention from those who are interested in the early past of mankind. The word megalith originates from the Greek, meaning ‘great stone’ and is used...
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<p>For centuries Stonehenge has mystified and enraptured archaeologists and visitors.</p>
<p>So maybe it is not surprising that another monumental wonder from prehistory has been overlooked for so long – even though it is just a mile away.</p>
<p>Experts have discovered an 'extraordinary' line of giant stones that dates back more than 4,500 years.</p>
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One of the mysteries of Stonehenge is how some of its stones were brought from Pembrokeshire in Wales to Wiltshire. Photograph: I Capture Photography/Alamy For almost a century archaeologists have been braving the wind and rain on an exposed Welsh hillside in an attempt to solve one of the key mysteries of Stonehenge. But new research about to be published suggests that over the decades they may have been chipping away at the wrong rocky outcrop on the Preseli Hills in Pembrokeshire. The work in the hills is a crucial element in the understanding of Stonehenge because it is generally...
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Experts say they have confirmed for the first time the precise origin of some of the rocks at Stonehenge. It has long been suspected that rhyolites from the northern Preseli Hills helped build the monument. But research by National Museum Wales and Leicester University has identified their source to within 70m (230ft) of Craig Rhos-y-felin, near Pont Saeson. The museum's Dr Richard Bevins said the find would help experts work out how the stones were moved to Wiltshire. For nine months Dr Bevins, keeper of geology at National Museum Wales, and Dr Rob Ixer of Leicester University collected and identified...
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Stonehenge was a site for sore eyes in 2300BC By Nic Fleming, Science Correspondent Last Updated: 2:48am GMT 27/11/2006 Stonehenge was the Lourdes of its day, to which diseased and injured ancient Britons flocked seeking cures for their ailments, according to a new theory. For most of the 20th century archaeologists have debated what motivated primitive humans to go to the immense effort of transporting giant stones 240 miles from south Wales to erect Britain's most significant prehistoric monument. Druids gather at Stonehenge for sunrise on the summer solstice. A new book suggests the gathering should take place in December...
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The tomb for the original builders of Stonehenge could have been unearthed by an excavation at a site in Wales.The Carn Menyn site in the Preseli Hills is where the bluestones used to construct the first stone phase of the henge were quarried in 2300BC. Organic material from the site will be radiocarbon dated, but it is thought any remains have already been removed. Archaeologists believe this could prove a conclusive link between the site and Stonehenge. The remains of a ceremonial monument were found with a bank that appears to have a pair of standing stones embedded in it....
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16 November 2006 Stonehenge ‘No Place for the Dead’, Says BU Expert Professor Timothy Darvill, Head of the Archaeology Group at Bournemouth University, has breathed new life into the controversy surrounding the origins of Stonehenge by publishing a theory which suggests that the ancient monument was a source and centre for healing and not a place for the dead as believed by many previous scholars. After publication of his new book on the subject - Stonehenge: The Biography of a Landscape (Tempus Publishing) - Professor Darvill also makes a case for revellers who travel to be near the ancient monument...
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Archaeologists figure out mystery of Stonehenge bluestones Jun 24 2005 Staff Reporter, Western Mail ARCHAEOLOGISTS have solved one of the greatest mysteries of Stonehenge - the exact spot from where its huge stones were quarried. A team has pinpointed the precise place in Wales from where the bluestones were removed in about 2500 BC. It found the small crag-edged enclosure at one of the highest points of the 1,008ft high Carn Menyn mountain in Pembrokeshire's Preseli Hills. The enclosure is just over one acre in size but, according to team leader Professor Tim Darvill, it provides a veritable "Aladdin's Cave"...
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A geology team has contradicted claims that bluestones were dug by Bronze Age man from a west Wales quarry and carried 240 miles to build Stonehenge. In a new twist, Open University geologists say the stones were in fact moved to Salisbury Plain by glaciers. Last year archaeologists said the stones came from the Preseli Hills. Recent research in the Oxford Journal of Archaeology suggests the stones were ripped from the ground and moved by glaciers during the Ice Age. Geologists from the Open University first claimed in 1991 that the bluestones at one of Britain's best-known historic landmarks had...
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The study, published in the current issue of the journal Antiquity, indicates that two quarries in the Preseli Hills of Pembrokeshire, in southwest Wales, are the source of Stonehenge’s bluestones. Carbon dating revealed such stones were dug out at least 500 years before Stonehenge was built — suggesting they were first used in a local monument that was later dismantled and dragged off to England. The very large standing stones at Stonehenge are sarsen, a local sandstone. The smaller ones, known as bluestones, consist of volcanic and igneous rocks, the most common of which are called dolerite and rhyolite. Geologists...
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Thunder eggs are spherical objects which form in some types of silica-rich volcanic rocks (e.g. rhyolites). As the volcanic lava cooled, trapped steam and other gases formed an expanding bubble. Silica and feldspar minerals often crystallise around the bubble or grow crystal fibres which radiate outwards from the its centre. These mineral-filled bubbles with a radiating structure are called spherulites. Internal gas pressure forces the spherulite apart to form a central hollow, later filled with more minerals. Adjacent wedge-shaped segments of the cracked and expanding spherule move outwards and away from each other, helping form the typical star-shaped interior. Silica...
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While sometimes I feature the work of professional photographers, I found these three at the linked site. Interested readers are invited to search and post their own favorites of these features, if so inclined. Lassen Peak Bumpass Hell Burney Falls -- a beautiful and unique waterfall I'd never heard of before
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A mixed (and beautiful) bag this week. If you go to the articles linked above the pictures, you can access a bigger (in the case of Katmai, much bigger) image. Bungle Bungle Range Katmai National Park and Preserve, Alaska For fun, two historical pictures of Novarupta and the Valley of Ten Thousand Smokes soon after the eruption: AND finally, go to this Space Daily article to see a large version of the view that the Mars Rover Spirit had yesterday: Robot from Earth Climbs Mountain on Mars
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