Category: Palaeolithic

So, Spring has sprung. We are 20 days into the meteorological Spring (started 1 March) and now starting the astronomical or solar Spring. The 20th of March is the Spring Equinox, or Vernal Equinox, half way between the Winter Solstice and the Summer Solstice. The sun has been rising further north each day since December 21^st, and it now rises due East, and sets due West, The day and night are roughly equal in length although by no means exactly.

The term vernal comes from the Latin for Spring, and today is the primavera, the first day of Spring. The Anglo-Saxons originally used the word lencthen (Lent) for Spring, but later adopted the idea of the springing of the year when the plants bud. In Middle English the word Spring was also used for sunrise, the waxing of the moon, the rising tides (spring tides) as well as sprouting of the beard and the first appearance of pubic hair!

Up to the 15^th Century the English also used the french term ‘prime-temps’ in the sense of ‘first times’. This follows the idea that the year is young, while Winter represents old age. As we shall see, on March 25^th, there was also a belief that the world was created in Spring at what became the Equinox (after God created it!), and Jesus was also conceived at this point of the annual cycle.

Zodiacally, if that is a word, Spring is Aries (brave and impulsive); Taurus (sensual and stubborn), and Gemini (dynamic and talented).

The modern druids have been out at their annual Spring Equinox festival at Tower Hill. I have a picture of this from many years ago when I last attended, but, Heike Herbert, who seems to be always travelling around the world, was in the UK for long enough to attend the Druid Festival and has kindly let me use photos for this post. When I last went to the ceremony I remember noting, with some distaste, that the druid costumes seemed to be made with nylon sheets, and their footware was mostly plimsolls. I see the nylon has at least been replaced with cotton, and the plimsolls with trainers. Not quite sure what that pair of black trainers are doing in the picture!

I say modern druids because there is no convincing evidence that the modern fellowships of Druids can trace their origins back to prehistory. Druidry was reinvented in the 18^th Century – for example the Ancient Order of Druids was formed in 1781. They were set up as societies in the tradition of the freemasons and with a belief in the fundamental importance of nature.

As to when the Equinox first had importance for human society, the answer is, probably, at least as long as we have been reasoning creatures. On January 24th I draw attention to a recent discover suggesting evidence for a Palaeolithic Calendar. This is what I wrote:

But recently, evidence of a Palaeolithic Calendar has been uncovered by an ‘amateur’ studying markings in cave paintings at Lascaux, Altamira and other caves. Furniture maker Ben Bacon has collaborated with Professors at UCL and Durham and interpreted markings which suggest the use of a lunar calendar to mark the time of the year when particular animals gave birth. A Y shaped mark is interpreted as meaning ‘giving birth’ and the number of dots or dashes drawn by or in the outline of the animal or fish has been shown to coincide with the time of the year that the wild creature gives birth. For further details follow this link: https://www.bbc.co.uk/news/

At Stonehenge, in the old Car Park they found three huge Pine postholes in a line, erected in the Mesolithic period. They align to the direction of the Mid Summer Sunrise and Mid Winter Sunset (NNE/SSW) IF and its a big if, you were sighting from Stonehenge itself which was built some 5000 years in the future. It is a bit of a stretch using two pieces of evidence so far apart in time but recent excavations have revealed that there are, on the Stonehenge site, natural periglacial striations in the soft chalk bedrock which themselves point to the Solstices. These not only predate Stonehenge but also the three post holes, and may well have been visible from the time they were created when the glaciers melted.

As I’m on a train to Amsterdam with no internet I’m using dates from my memory which are roughly right but not as accurate as they might be. Around 12,000 years ago the climate changed and the glaciers melted. This left a lot of water rushing around the landscape and at Stonehenge, it gouged out striations in the chalk. By chance, or as ordered by the Gods/Goddesses/Divine Nature, the striations pointed to the Solstice Axis, just at a place where the Gods/Goddesses/Divine Nature provided super-abundance in the guise of herds of Aurochs, which are huge wild cows. Richard Jacques excavations in the vicinity of Stonehenge have revealed that the aurochs came to the Stonehenge area for grazing and water. Each one had enough meat on them to feed 200 people. So, by 8,000 BC we have what might constitute proof of recognition of the significance of the major movements of the Sun.

This is confirmed by the alignment of many megalithic monuments dating from 3,600 BC onwards, including, of course, Stonehenge. Also all around the UK are long barrows and other burial mounds, many of which are indeed sighted/sited E-W to the Equinoxes. Many are fairly approximate, but at Loughcrew, County Meath in Ireland the Vernal Equinox shines right into the burial chamber, onto a stone marked by stone carvings. Similar alignments are recorded at Knowth and Dowth in the Boyne Valley.

The Equinox also has another role which is to be the anchor of the cardinal points – North, South, East, West, when there is a harmony, a balance in the world, and therefore a fortunate, a lucky time, a time to fall in love or undertake notable undertakings. Of course, as the Christian world awaits the commemoration of the death of the Messiah, marriage has to wait a little longer.

There are also two versions of the cardinal points too: there are the geographic and the magnetic cardinal points. The magnetic cardinal points wander – magnet North does not always point North, the earth has sometimes had magnet reversals when the north pole has pointed in different directions including south.

My first proper job after university was as an technician then research assistant at Oxford University studying this phenomena. I say ‘proper’ because when I left University, I became an itinerant archaeologist, digging in Switzerland, Northampton, East Anglia and Nottingham before I got the job at the Research Laboratory for Archaeology and the History of Art, Keble College Oxford. Working with Dr. Mike Barbetti who was an expert on the wanderings of the Magnetic Pole. His interest was firstly in the pure science of the subject, but he was keen to explore the applied uses of the science to Archaeology as well So, after being appointed as a Research Fellow at Oxford he set up an epic journey from his native Australia to Oxford that went via some of the iconic sites of Palaeolithic Archaeology, such as Olduvai Gorge, Tanzania, site of excavations by Mary and Louis Leakey.

In order to plot the movements of the magnetic north, scientists needed dated samples, and early human sites were some of the best dated sites. Also, archaeomagnetism, as the discipline became known, offered the possibility of dating sites. Also to determine whether deposits were fired or not. One of the sites Mike sampled was a candidate for the first evidence of fire in human existence.

As I said, Mike’s interest was discovering how the magnetic field of the earth changed over time, and, more importantly, what was the mechanism. He shipped back to Oxford samples of soil cast in plaster of paris. My job was to cut the samples up and to measure the strength and direction of the magnetic field in the samples. I cut them up with an electic saw in a shed in the backyard of the Laboratory, and then we used a mini-computer to measure the direction and intensity of the magnetic field in the samples. Soil contains particles of iron, and they align randomly so a sample of soil has a low magnetic intensity and a random direction of magnetic field. But once heated up, the iron particles align to the current direction of the magnetic pole and its intensity is proportional to the intensity of the Earth’s magnetic field and so provided a method of plotting the changes of the magnetic field. And from this data models could be constructed explaining how the iron in the earth’s core worked as a giant magnet.

We could tell if a sample of soil had been heated by fire and once we had built that reference curve for the movements of the direction of the magnetic poll and the changing intensity of the magnetic pole we might be able to develop another dating method to rival radio carbon, thermoluminescence and tree ring dating all of which were being developed at the Research Laboratory in Oxford.

Having got the results I then typed them up onto machine readable cards, took them to the Oxford University Computer Centre with a copy on cards of the programme written in Fortran, and gave them to the Computing Staff. They were run through the Centre’s mainframe computer which was probably an IBM or ICL computer, and 24 hours later I received a print out to proof read. When I located mistakes, I ran an editing run of punched cards essentially instructing the computer: ‘ on card two replace 2.5 with 2.6, and run the programme again’. I would pick up the results 24 hour hours later.

It seems extraordinaryily primative now but then it was an enormous saying of time. And that, patient reader, was my early contribution to Digital Heritage and pure science. We published at least three articles in the prestigious Science Journal Nature. And it is slightly annoying that my citations in the groves of academia are still dominated by articles I co-wrote in the late 1970s!

The work was important in the development of the study of the earth’s magentic field. However the use of archaeomagnetism in archaeology has never risen above strictly limited. Occassionally, in specific circumstances, it can be useful, but those circumstances tend to be times when no other methods came up with the goods and most often in attempting to date kilns.