Tag Archives: Underwater Archaeology

Roman Coins and Mystery wrecks

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Nummus showing The Goddess Helena. Obverse. view of one of the Seaton Down coins. Courtesy of the Trustees of the British Museum.

It is not often you get to hear from one of the world’s leading authorities on Roman Coins. In the new episode of the Archaeology Hour, Vincent Drost, Roman coin expert at England’s British Museum, speaks to us about 22,000 coins found at Seaton Down in the recent past. The coins gives us insight into the Roman monetary system and its empire-wide mints. We also discuss why so many such coin hoards were buried and never recovered.

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One of the Seaton Down coins was the millionth object cataloged by the Portable Antiquities Scheme. Image: Courtesy of the Trustees of the British Museum

More images of the Seaton Down coins can be found at:

http://wp.me/P5zmjV-1i

Next Christine Madigan (voted best Brit accent) gives us an overview of the current exhibit at the British Museum on The Celts. Working with the national Museum of Scotland and sources on the Continent, they have brought together some of the most remarkable finds over the years – magnificent pieces of jewelry and armor decorative in the distinctive Celtish style.

The British Museum - great shot from ThinkingBob.co.uk
The British Museum – great shot from ThinkingBob.co.uk
Images from the Gundestup Cauldron showing Cernnunos: Images: ww.britishmuseum.org
Images from the Gundestup Cauldron showing Cernnunos: Images: ww.britishmuseum.org
Spectacular brooch, typical of Celt goldsmithing. Image: ww.britishmuseum.org
Spectacular brooch, typical of Celt goldsmithing. Image: ww.britishmuseum.org
The horned 'Wandsworth' helmet. Image:ww.britishmuseum.org
The horned ‘Waterloo’ helmet found in 1860. Image: http://www.britishmuseum.org
Celt shield found at Wandsworth in London. Image: British Museum
Celt shield found at Wandsworth in London. Image: British Museum.

Finally NOAA archaeologist Bruce Terrell discusses a mysterious wreck found in six thousand fathoms off the coast of North Carolina. Far out on the Blake Plateau the little craft may be a coasting schooner blown far off course – or perhaps a rare Bermuda Sloop. Coasting schooners are represented by the vessel found at Brown’s Ferry in the Black River near Georgetown SC.

Conserved remains of the Brown's Ferry Coasting Schooner. Photo: www.sciway.net
Conserved remains of the Brown’s Ferry Coasting Schooner. Photo: http://www.sciway.net

Excavated by Alan Albright and later worked on by the author, the wreck tells us much about how these craft were built and operated. Bermuda sloops, however, are poorly documented. The National Maritime Museum in UK has drawings made by the Admiralty (they were that impressed by the speed and handling of the sloops) but wreckage has never been found and verified.

Bermuda Sloop under sail from an old print. Image: Hosea.blogspot.com
Bermuda Sloop under sail from an old print. Image: Hosea.blogspot.com

There MAY be a wreck of one off Turks & Caicos and Nick Hutchings of Bermuda has been planning an expedition to it for some years now. The Bermuda Sloop Foundation has built a replica from modern materials based on a painting. The North Carolina ‘mystery’ wreck has yet to be examined by an archaeologist. Terrell tells us about the discovery and attempts to identify it.

You can hear the entire program at:

http://archaeologyhour.podomatic.com/entry/2015-10-15T11_34_00-07_00

 

 

 

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This Week: The Return to Antikythera

This weekend scientists, divers and support staff will begin to converge off the Greek Island of Antikythera to mount a technologically advanced excavation of an ancient wreck that in 1901 yielded an astonishing array of marble and bronze artworks along with coins and a navigational computer that continues to astound experts.

Demetrios Kondos disovers the Greek statues on the sea bed off Antikythera Credit: http://www.lookandlearn.com/blog/12271/greek-statues-rescued-from-the-aegean/
Demetrios Kondos disovers the Greek statues on the sea bed off Antikythera Credit: http://www.lookandlearn.com/blog/12271/greek-statues-rescued-from-the-aegean/

Sponge divers discovered the Antikythera wreck in 1900. In the following year they raised bronze and marble sculptures and parts of sculptures that amazed the art world and scientists then, and ever since.

Last year Greek and American archaeologists returned to the site to inspect and map it. They had the advantage of the latest available technology from Woods Hole Oceanographic Institute and other sources. What they found astonished them. In an exclusive interview with the Archaeology Hour, the project’s American leader, archaeologist Brendan Foley, spoke about what lay deep beneath them. “We were able to fully map the site and produced a three dimensional image of the sea bottom. We were shocked to discover the wreck was much larger than earlier work had indicated – 30 to 50 meters (90-100 ft) long! The hull timbers were 11 cm (approx. 41/2”) thick. This would make the wreck bigger than the pleasure barges Caligula built for his artificial lake and they were the largest Roman era ships known.”

Brendan Foley of Woods Hole is the American co-leader of the project
Brendan Foley of Woods Hole is the American co-leader of the project

“This raises the question of what else may be on the ship. At this point of course we simply do not know – but the speculation has been exciting indeed!”

In 1900 the Greek sponge divers were working in hardhat rigs that allowed them only minutes of bottom time in which to rig marble horses and bronze statues for recovery. One died of the bends (nitrogen gas bubbles in the blood) and two were paralyzed.

 

The assembled crew in 1900 including the greek singer divers. Credit WHOI
The assembled crew in 1900 including the greek singer divers. Credit WHOI

The next few weeks over the wreck safety for the archaeologists will be a major factor. The dive teams will consist of a ‘technical diver’ well versed in the new diving technologies to be used, and an archaeologist. Both will be diving on closed circuit mixed gas systems that will allow them to spend as long as 90 minutes on the bottom.

“There will still be a need for an hour or so of decompression to prevent bends, “said Foley, “so each dive will take almost three hours. With this amount of time we expect to complete a great deal of excavation.”

In 1953 explorer Jacques Cousteau located the wreck with the help of MIT technology

A diver uses an air lift during the 1970 Cousteau dive on the Antikythera reck. Credit: http://antikythera.whoi.edu/history/1976-cousteau/
A diver uses an air lift during the 1970 Cousteau dive on the Antikythera reck. Credit: http://antikythera.whoi.edu/history/1976-cousteau/


Wizard’ Doc Edgerton. Cousteau returned in 1976 to excavate with an airlift and recovered some small bronzes.

“The depth would make an air lift difficult to handle – and we want to handle the excavation and possible finds as delicately as possible,” said Foley. “So, instead, we will used a water dredge – similar to an air lift except that we will hold it above the excavation layer and fan sand into it with our hands. This will allow for delicate retrieval of finds and help a great deal with visibility.”

Delicacy and caution will be essential considering the nature of what the sands of Antikythera may reveal. One object from the 1900 dive that has garnered more attention than any other is the ‘Antikythera mechanism,” a fused clump of finely crafted gears that is thought to be a highly sophisticated navigational computer.

The fabled Antikythera mechanism found during the 1900 dives. Credit: WHOI
The fabled Antikythera mechanism found during the 1900 dives. Credit: WHOI

According to Foley, “In its original state the metal components of the mechanism were thin sections of copper alloy. After thousands of years on the sea bottom they would now have the consistency of Fimo craft clay – very fragile indeed.”

It is not surprising that the wreck would have such a sophisticated device aboard. The massive craft appears to have been loaded with amazing art treasures from Greece. Coins found on the ship by Cousteau date it to 70-67 B.C. They were produced by the Roman mint at Pergamum.

Coins from the Antikythera wreck. Credit: http://www.namuseum.gr/object-month/2012/oct/oct12-en.html
Coins from the Antikythera wreck. Credit: http://www.namuseum.gr/object-month/2012/oct/oct12-en.html

This was in the same general timeframe that Roman General Lucius Cornelius Sulla Felix mounted an expedition into Greece and Asia Minor in 87 BC. This was close to a decade before the sinking of the Antikythera wreck, according to the coin dating. It was long thought that the ship might have been bringing treasures back to Rome for Sulla.

Roman General Sulla looted Greece and Asia Minor - but the wreck post dates his campaign by some ten years Credit: Wikipedia.
Roman General Sulla looted Greece and Asia Minor – but the wreck post dates his campaign by some ten years Credit: Wikipedia.

Foley’s working hypothesis is that the ship may have been a large grain carrier. “The marble and bronze artworks would have been difficult to stabilize inside the hull and would have made it difficult to trim the vessel. It makes sense that a grain carrier might have been used and that grain sacks could have been used to pack around the statuary.”

"The Philosopher" one of the bronze heads recovered in 1900. Image courtesy of the National Archaeological Museum, Athens (K. Xenikakis). Copyright Hellenic Ministry of Culture and Sports/Archaeological Receipts Fund.
“The Philosopher” one of the bronze heads recovered in 1900. Image courtesy of the National Archaeological Museum, Athens (K. Xenikakis). Copyright Hellenic Ministry of Culture and Sports/Archaeological Receipts Fund.

Last year divers found a seven foot long bronze spear not associated with any of the recovered bronzes. This leads Foley to believe that other major bronzes may still be found. Earlier recoveries also included separated heads, arms and feet that may also be from buried bronzes.

Diver with the tip of the bronze spear recovered last year. Part of the new statue? Credit: WHOI
Diver with the tip of the bronze spear recovered last year. Part of the new statue? Credit: WHOI

Certainly the ship was important, but there is still doubt as to who ordered it to be packed with such fabulous treasures. “We know some of Sulla’s ship’s sank north of Antikythera – but we do not think this is one of his ships at this time, “ said Foley.

Foley will be very much hands on during the project. He will be one of the divers. His dive buddy is Gemma Smith, one of the technical divers. For Smith the dive will be especially satisfying, she is in the midst of a long career as a technical or scientific diver – despite being told early in her career that she would never qualify in this demanding field.

Technical Diver Gemma Smith will be Foley's dive buddy. Credit: Gemma Smith
Technical Diver Gemma Smith will be Foley’s dive buddy. Credit: Gemma Smith

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Hear the Brendan Foley interview on the next edition of The Archaeology Hour at :

http://archaeologyhour.podomatic.com