Friday, September 11, 2015

Britain's Atlantis

 I personally think that continental shelf archeology world wide will completely rewrite history.  The problem is what will actually have survived.  

Most of the time the encroachment of the ocean was slow enough to grind up the foreshore pretty completely.  This leaves almost nothing behind.  Go for a walk on any beach to check this out.  fortunately there were at least one episode and plausibly two or three more in which the rise was sudden enough to put the old foreshore well below tidal action.

The north sea is actually an excellent prospect for reaches of undisturbed material.  This does mean careful mapping to eliminate clearly destroyed land.  I do not think that we will be so lucky as to discover that an overnight tectonic subsidence took place as happened close by the the mid Atlantic ridge.

What this all means is that technology is now both good enough and even cheap enough to plan extensive exploration.

Britain's Atlantis: Scientific study beneath North Sea could revolutionise how we see the past 

Archaeologists are searching for the lost tribes of prehistoric Britain – at the bottom of the North Sea.

In a unique and ground-breaking operation, scientists plan to search for evidence of Stone Age human activity on Britain’s very own ‘Atlantis’ – a vast prehistoric land, once located between England and southern Scandinavia, which was engulfed by rising sea levels some 7500 years ago.

The archaeologists hope to find evidence of flint tool manufacture, plant pollen and the DNA of plant and animal species used by the  long-lost land’s ancient inhabitants. Due to be launched later this month, the multi-million pound project is the largest of its kind ever attempted anywhere in the world and will lead to the development by British scientists of an entire range of new scientific techniques and capabilities.

Past survey work in the  southern part of the North Sea has identified some of the vanished territory’s original river valleys – and it is two of those now-long-drowned valleys that the scientists will target in their search.

They plan to recover ancient pollen, insects and plant and animal DNA and to use high definition survey techniques to accurately rediscover what the lost Stone Age landscape looked like, what vegetation flourished there and how humans impacted on and used the environment.

The project will reveal, for the very first time, the culture and lifestyle of the dozens of generations of prehistoric Brits who flourished there for 6000 years until it finally disappeared beneath the waves in the mid sixth millennium BC.

This real British Atlantis originally covered some 100,000 square miles of what is now the North Sea  (a long-lost territory around the size of modern Britain).  However, following the end of the  Ice Age, thousands of cubic miles of sub-Arctic ice started to melt and sea levels began to rise worldwide. The major period of ice melt and consequent sea level rise,  that specifically affected the southern part of the North Sea region, occurred between 8000 BC and 6000BC.

During that period of sea level rise, what were then coastal zones became increasingly vulnerable to catastrophic flooding. It is likely that massive storm surges – some up to 15 foot high - would have devastated large areas, probably  on average around four times a century. 

Due to the concentration of human hunter-gatherer activity in food-rich coastal and estuarine areas, such surges would have almost certainly drowned hundreds of people each time.

Gradually, most of the 100,000 square miles became permanently inundated – and by 6500 BC, the remnants of the dwindling North Sea territory had become a 140 mile long, approximately 100 mile wide island covering thousands of square miles (partly where the North Sea’s Dogger Bank is today). But, over the centuries, it gradually shrank and was finally overwhelmed by the  waves in around 5500 BC. It is conceivable that at least some of its last inhabitants would not have been able to escape.

Now, almost eight millennia after the death of Britain’s North Sea Atlantis, archaeologists are about to re-discover its secrets.

It’s hoped that their research will reveal where the inhabitants lived, what they ate and what their environment looked like.

The expedition also hopes to discover whether they were culturally more advanced than previously believed. Plant DNA, recently obtained from another ‘drowned’ landscape (the Solent, between the Isle of Wight and  mainland England) suggests that Stone Age people in that area  were eating (and therefore importing or possibly growing) wheat some 2000 years earlier than previously thought.

Now the scientists plan to systematically search for similar wheat or other domesticated species DNA  evidence in what was once dry land under the North Sea.

Within the next few weeks the scientists will start sinking bore holes into the  drowned Stone Age land surfaces in order to extract samples of ancient earth.

Hundreds of such samples will be taken to the laboratories  at the universities of Bradford, Warwick, Lampeter, St. Andrews and Birmingham where scientists will separate out seeds, pollen, potential DNA material and tiny fragments of broken flint (the tale-tale evidence of flint tool manufacture).
Using sonar and high definition seismic equipment, the archaeologists will also produce more refined 3D maps of the original landscape and its topography. It’s conceivable that they may even locate  man-made Stone Age structures, potentially the remains of any timbers used for ritual monuments or hunting drive-ways.

The research is likely to transform the academic world’s understanding of pre-agricultural British society. That is because the vast majority of pre-agricultural Britons almost certainly lived in now-long-drowned coastal environments – and very few such areas have ever been systematically investigated.

The project may also revolutionize the world’s understanding of the spread of agriculture. Until very recently all the available evidence suggested that once agricultural knowledge had reached an area, it quickly triggered rapid economic and social change. But the recent very early wheat DNA evidence from the Solent, if confirmed in the upcoming ‘North Sea Atlantis’ investigation, would totally contradict that understanding of the process. Instead, it may be that agricultural knowledge spread widely at least 2000 years earlier than previously thought but had no significant economic or social impact for scores of generations.

The research will also, for the first time, reveal how humans and other animal and plant species adapted to the sea level rise catastrophe which hit many areas of the world after a natural version of ‘global warming’ brought the last Ice Age to an end.

Bradford and Nottingham  universities are now developing new computer software that will enable them to  accurately model how plants, animals and ultimately humans recolonized much of Britain (including Britain’s North Sea Atlantis) after the extreme cold of the Ice Age – and how species then tried to adapt to  rising sea levels and periodic salt water infiltration and flooding that increasingly resulted from it.

The archaeologist leading the entire North Sea investigation, Professor Vince Gaffney of the University of Bradford,  believes that the project will transform the academic world’s understanding of how northern Europe was re-colonized by humanity when climatic conditions became warmer some 12,000 years ago.

“As conditions got warmer, there was a period of just a few thousand years when large areas of Europe’s continental shelf were recolonized by Stone Age humans," said Professor Gaffney.

“Warmer temperatures melted vast quantities of ice which caused very substantial sea level rise which in turn gradually drowned the most populated parts of the newly recolonized land.

“Because these areas of continental shelf became sea, they have been inaccessible to archaeologists until now.

“However, this project will access  new data at a scale never previously attempted.  Novel mapping, DNA extraction and computer modelling representing people, animals and even individual plants will  generate a 4 dimensional model of how Doggerland was colonised and eventually lost to the sea.

“A dramatic, and  previously lost, period of human prehistory will begin to emerge from the seismic traces, fragments of DNA and snippets of computer code that will form the primary data of this innovative archaeological project.”

The project, regarded by scientists across Europe as an important and unique operation, is being funded over the next five years to the tune of 2.5 million Euros  by the European Union's European Research Council.

No comments: