Showing posts with label Archaeological. Show all posts
Showing posts with label Archaeological. Show all posts

Monday, 11 March 2013

Secrets of the Stonehenge Skeletons


Secrets of the Stonehenge Skeletons: Initial Critique

Interesting documentary last night shown on Channel 4: Secrets of the Stonehenge Skeletons.


1)  The Procession
In the graphics, the program described how up to 4000 people formed a procession up the along the Avenue to pay their respects to the dead.... and observe the winter solstice sunset through the aligned stones: This being one of the main conclusions of the documentary.

Extract from video feed of the programme

The problem with this idea is that the most recent English Heritage report has shown that it was unlikely to have been used for processions: The track-way would have been rutted at the elbow of the Avenue (see English Heritage report 31 entitled The Avenue And Stonehenge Bottom”).


2)  The Solstice gathering
The program described how people walked up to Stonehenge to see the winter Solstice: At Winter Solstice, the sun can be seen setting at and through the bottom of the Great Trilithon stones when seen from the direction of the Avenue. 


The problem with this idea is that the Avenue is on a slope: You can not see the bottom of the stones from most of the Avenue (see photos in this post). 

Yet the monument has been shown to have been specifically designed to be seen from the Avenue (see English Heritage report 32 entitled Stonehenge Laser Scan: Archaeological Analysis Report”). If the monument were built for the purpose described in the documentary, the builders appear to have chosen a particularly bad location. 


3) Metals
In the program, the reason for Stonehenge's decline was said to be due to the Beaker people, who apparently brought metals to England after Stonehenge was built: Stonehenge seemingly declined as a result. Copper: A beautiful shiny new material: Metal. Nobody before had seen this in Britain (quote from Documentary).

Extract from video feed of the programme

The problem with this is that his book (“Stonehenge: Exploring the Greatest Stone Age Mystery”) describes in a lot of detail how metals were likely to have been in use at Stonehenge when it was built: For example on page 125 he describes how copper used in ditch digging at Durrington Walls has been dated to 2480-2460Bc (and lists other evidence for copper use prior to 2500BC). The date given for the construction of Stonehenge is 2620-2480BC (see page 310). 

Both the program and the book appear to state that Durrington was built to construct Stonehenge. This evidence showed that animals were being slaughtered [at Durrington] to mark the mid winter Solstice at Stonehenge.... and this was happening at exactly the same time as the second phase of the building of the monument.... so Durrington was effectively a builder's camp servicing Stonehenge's construction

In other words, the sequence described appears to be wrong: If you are building a settlement to house workers, you build the settlement first, not the monument. If the settlement was built first, then Mike Parker Pearson's book suggests that metals were in use before Stonehenge was built. Yet at the same time, the documentary suggests that the discovery of metals was the reason that Stonehenge stopped being used.


4) Periglacial Stripes
The program described how two periglacial stripes were the reason that the location on Salisbury Plain was chosen for Stonehenge:

Extract from video feed of the programme

The problem with this is that periglacial stripes form as a result of slope weathering: There will be more than just two of them. The two that have been selected for the program make it appear as if they are special. 

Before the Avenue was built there would have been multiple stripes to choose from, probably radiating out from the hill summit in differing directions, and not just the two which are shown on the program (beneath the Avenue). The idea that these two stripes made the original location special appears hopeful rather then conclusive.


Overall 

In summary, some of the conclusions of the documentary appear to be discounted by the evidence of the team that contributed to it: This was a bit disappointing.


Additional note: (06-13)
The Periglacial Stripes: The criticism is more about the evidence presented rather than the possibility that this may have existed (as the reason to signify that the Stonehenge location was special). If better evidence exists, perhaps something not noted in either the program or the book by Mike Parker-Pearson, it would be great to see this and be able to strike it off the list.




Sunday, 14 October 2012

Stonehenge Laser Scan


In late 2012, English Heritage published an archaeological report (download here) which contains many newly discovered details together with artwork.

Extracted from page 29


Thursday, 5 July 2012

Timeline: Metals and the Tin Islands

When Stonehenge was being designed & constructed, some evidence suggests that both copper and tin were being extracted and were either being developed (or already in limited use as tools) within the British Isles. Tin degrades in cooler climates so the only archaeological evidence remaining is likely to be in tin mining.

A possible time-line, based on the evidence below, is shown on this graph:




Thursday, 1 March 2012

Stonehenge and the Tin Islands (Part 2)

Northern Earth's magazine kindly reviewed The Broken Stone and the secret of the Heavens' Henge for their spring 2012 issue this month. The problem of evidence for tin was mentioned and the review reminded me about something I have been meaning to add to the blog for a while.

Tin:


The problem of evidence:
Unalloyed tin suffers from "tin pest" at temperatures below 13 Celcius, resulting in a gradual transformation into dust (refer to: wikipedia, tin pest). Even had objects been made from Cornish tin, there would be no evidence of the original form unless they had been transported to a warmer climate or kept in a heated internal environment.

Saturday, 28 January 2012

Stonehenge and the Tin Islands: (No 1)

Legends of mining from the Tin Islands (Cassiterides) were old before the start of the first millennium. When Stonehenge was built, the evidence suggests that tin was also being mined in south western Britain.

The Evidence:
A large piece of timber, worked by hand tools, was found in 1839 during the mining of a deep bed of tin ore (cassiterite) in Cornwall. Too young to have been deposited by nature, carbon dating showed that it was as old as Stonehenge. Below is the full extract of Roger Penhallurick's description, produced for The Institute of Metals:

"The second specimen is far more intriguing. On 5 July 1839 Winn described wood recently obtained from the Wheal Virgin tin streamworks [1] then at Levalsa Moor and progressing upstream at a rate of about 1.8m a month (see Fig. 90). Much of the vegetable matter was sub-fossil, but specimens of nuts and wood that Dr Winn presented to Truro Museum have not survived. The barren sediments 9 m thick overlay a tin ground c.1.5 m thick. The sediments differed from those at Happy Union in that they lacked the marine deposits encountered further down the valley. A 'large' trunk of a semi-carbonised oak was 'imbedded in the upper portion of the tin ground in a horizontal position and on its upper surface about 11 feet from its extremity there was a large angular notch which must have been formed by a hatchet or some other sharp instrument'. A portion containing one side of the cut notch was presented to Truro Museum where it is still preserved.

"Sub-fossil wood resting on top of the tin ground ought to have a date of c. 10000 bp [2], or even earlier. Wood found within the tin ground cannot have arrived there at the same time as the cassiterite, and it can hardly be doubted that Winn's oak trunk had been put there by man. It has been dated at the University of California, Riverside (UCR 1828), to 4140 +/- 100 bp, giving a time range of 3015-2415 BC. This is uncomfortably early, even if the precise calendar date lies at the end of the range. It suggests that tin streaming in Cornwall began much earlier than hitherto suspected."

My notes:
[1] Streamworks: Underground mining of a buried layer of tin which is then sent to the surface to be washed by a stream
[2] 10,000 bp = At or before the last ice age

References:
Book 325 Published by The Institute of Metals
Extract from pages 182-184
ISBN 0904357813 / 9780904357813
Penhallurick, R. D.
Tin in antiquity: its mining and trade throughout the ancient world with particular reference to Cornwall

More information:
More information can be found in the appendixes to The Broken Stone and the secret of the Heavens' Henge.