Archives for posts with tag: tectonic plates

Speculating on a view of the world projected from the perspective of the rock. In the studio drilling more holes for optical lenses set out in a pattern based on the crystal structure of the naturally magnetic mineral magnetite which was determined in 1915 as one of the first crystal structures to be obtained using X-ray diffraction. Found in igneous rocks, sedimentary deposits and sand across the globe in many locations, magnetite is also found in the cells of organisms from bacteria to humans. Magnetite contains both ferrous (divalent) and ferric (trivalent) iron along with oxygen.

Testing projecting through the optical lenses I’m excited to see how the different lenses cause images to overlap and distort.

I received a Digital Microscope for my birthday and a selection of rocks and meteorites to look at. So far I have only used the lens with the least magnification capabilities yet this is revealing wonderful detail in the rocks which are further enhanced by using a polarising filter. I have chosen to look at rocks which originate near areas of tectonic activity or that may have magnetite in them.

Images on left have no filter, those on the right have a polarising filter.

This thin slice of Deep Ocean Pebble was collected in 1979 three miles deep in the Pacific Ocean Clarion Clipperton Fracture Zone. This zone is regularly considered for deep-sea mining due to the abundant presence of manganese nodules. In 2016, investigation of the seafloor in the zone was found to contain an abundance and diversity of life – more than half of the species collected were new to science.

This slice of Lewisian Gneiss is 3 billion years old. These ancient rocks from the Isle of Lewis were caught up in a mountain building cycle roughly 490–390 million years ago and were pushed above younger rocks formed during the late stages of this tectonic event.

This slice of Olivine Basalt comes from Þingvallavatn, a rift valley lake in southwestern Iceland. The area is covered by lava. The cracks and faults around the lake is where the Eurasian and North American tectonic plates meet. This may be the only place where one can stand with two feet on two different tectonic plates. The sample is a mid oceanic ridge basalt (MORB) fine grained but consisting of small olivine, clinopyroxene fragments in ground mass dominated by plagioclase laths, an opaque magnetite.

This slice of Vesicular Basalt Lava – a type of lava that solidifies into a rock with trapped gas bubbles leaving small holes as the lava cools, comes from the Mid Atlantic Ridge near the Azores Islands.

I also have a piece of Jepara taken from a pallasite, a class of stony–iron meteorite, discovered in Indonesia in 2008 during building excavations. The outside is heavily weathered but when cut and polished the inside reveals a translucent structure of densely packed olivine and magnetite. The sample has been coated with acrylic which has surface scratches so I think some of the detail has been compromised but it is still beautiful. No filters used here.

I am making use of public access to historical magnetograms recording of Earth’s magnetic declination to feed into new work inspired by palaeomagnetism. Magnetic studies of the ocean in the 1950’s had determined that the ocean floor was covered by bands of magnetic stripes that varied between normal polarity and reversed polarity. The Earth’s magnetic field has reversed polarity many times over the past hundreds of millions of years. These magnetic stripes were found to be symmetrical on the ocean floor about the mid-oceanic ridge. In 1963 British scientists, Fred Vine and D. H. Matthews proposed that the magnetic striping was caused by paleomagnetism, the storing of Earth’s ancient magnetic field in the sedimentary rocks that were forming as lava spewed up and spread across the ocean floor setting the history of pole reversals in stone.

I have embarked on some crystal growing experiments using a seed crystal in a saturated solution of mono-ammonium phosphate and aluminium potassium sulphate. I am hoping these might become objects to view through a lovely old wooden magnifying box I have. The last time I experimented with crystals was when I was amazed by the speed and glut of salt crystals overwhelming the test area. Before that made a time lapse video over 5 days of crystal growth for the installation Time Crystals in Reading Stones at St. Augustine’s Tower 2019. I will be learning more about this as workshops are developed for The Geological Unconscious public engagement programme which will run alongside the exhibition at Hypha HQ Euston this coming spring. Both Julie F Hill and Sophie Mei Birkin work with crystal structures and growth in their own practices and will be leading on the workshops we will run in partnership with a local primary school.

A crystal is like a class of children arranged for drill, but standing at ease, so that while the class as a whole has regularity both in time and space, each individual child is a little fidgety. Dame Kathleen Lonsdale, 1948

Had some studio fun testing the possibilities of magnetic putty for future video ideas. Mesmerising the way it very slowly swallows the magnet.

I began the magical process of making copper ink. Soaking pieces of copper in vinegar and salt, stirring daily and watching the liquid turn a milky turquoise blue. Looking forward to using this to patinate copper but also to paint with on paper.

Experimenting winding a copper wire around an iron nail and connecting the wire to a battery cell. A magnetic field is generated around the nail which stays for a little while after the nail is removed from the coil. I used a 9v battery and large nail– it wasn’t a very strong magnet – a welding stick was better and seemed to retain the magnetic field for longer but in both cases the battery got very hot. I had hoped to maybe develop this idea to magnetise a sculpture threaded with iron. Needs more investigation.

I have been exploring the updated Digital Materials Library at the Institute of Making which led me to the Mindsets website which has some cool magnetic materials for sale. Future experiments upcoming.

Exploring paper weaving patterns with a view to reinventing past works while thinking about ideas of cosmic planes in The Rosicrucian Cosmo-Conception, a 1909 text by Max Heindel. This text, setting out a theory of seven Worlds and seven Cosmic Planes, supposes an intermingling of spirit with matter where the intersection of the material and metaphysical world are not one above another in space, but inter-penetrate each with the other.

Astonishing that the preserved remains of the ancient kauri trees of New Zealand, alive over 42,000 years ago, can reveal the time of the last significant magnetic pole excursion within their rings. During what is known as ‘The Laschamps Excursion’, the north and south magnetic poles swapped places for about 500-800 years before swapping back again. During a magnetic pole reversal the magnetic field weakens so many more cosmic particles reach the surface of Earth. This means much more Carbon-14 is produced in the atmosphere and absorbed by plants.

Changes in radiocarbon levels were recorded from four ancient kauri logs found buried in peat swamps which seals them in a chemically balanced environment. Through high precision carbon dating processes at the University of Waikato in New Zealand the scientists discovered the most dramatic time was the lead-up to the reversal, when the poles were migrating across the Earth and our magnetic field practically disappeared, leaving life here very vulnerable to cosmic radiation. It appears, this weakening 42,000 years ago, in combination with a period of low solar magnetic activity – captured in evidence from ice cores, caused damage to the ozone layer and disrupted atmospheric conditions impacting the global climate so that devastating environmental changes took place. The research team links this climate change to extinction events which occurred at the same time, Neanderthals vanishing from Europe, and a proliferation of cave paintings appearing in Europe and Asia as humans find shelter from the turbulent weather and increased electrical storms. They have dubbed this period of excursion ‘The Adams Event’ in honour of Douglas Adams who wrote in The Hitchhikers Guide to the Galaxy that ‘42’ was the answer to life, the universe, and everything

Studio Visits

Julie F Hill and I have been visiting the other artists participating in the upcoming exhibition The Geological Unconscious at Hypha HQ Euston. We are so happy to be working with Charlie Franklin who considers control, physical experience and memory within the natural landscape, Deborah Tchoudjinoff who considers what the form is through the process of material and visual experimentations, Rona Lee who centres on the politics and aesthetics of Geo-materiality along with the human /more than-human entanglements of contemporary life and Sophie Mei Birkin who investigates the generative potential in the transformation of matter through a variety of material processes such as growing salt crystals and exploring amorphous and decomposing substances.

I have also been lucky to have Charly Blackburn and Victoria Rance visit my studio to chat about our respective work and shared interests. Charly is beginning a period of research into rare earth materials and extractive processes and we share a fascination with things magnetic. Victoria came to chat about our shared interest in the sun but is also interested in magnetic fields and the potential they offer for brain to brain communication.

Gallery Visits

Haegue Yang Leap Year at Hayward Gallery. With colourful works festooned by garlands of bells and strewn with fairy lights this was a perfect show for the festive period. Folklore, surrealism and ritual, collage and costumes combine with the modern domestic/utilitarian in hybrid works that have a playful carnival air.

Thoughtful works beautifully presented Each Place Its Own Mind at Edel Assanti with Mirtha Dermisache | Noémie Goudal | Sky Hopinka | Anna Hulačová | Marguerite Humeau | Bronwyn Katz | Kat Lyons | Yukultji Napangati | Emmanuel Van der Auwera. An ongoing collective reimagining of our relationship with the living world, rooted in revelations from indigenous knowledge, ecological research, literature, science, and artistic experimentation. Each Place Its Own Mind  borrows its title from ecologist David Abram’s 1996 book The Spell of the Sensuous, which traces the ways the human mind came to renounce its “sensory bearings” in the natural world, visualising a myriad of “lost” faculties that link the “inner, psychological world and the perceptual terrain that surrounds us.”

Damian Taylor Things Past at Thames-side Studios Gallery. These paintings hover on the edge of discovery where content and surface are ambiguous but reward study with tantalizing recognizable glimpses.

Events

A little out of my depth at the A&G Highlights Meeting at The Geological Society where some talks were quite specialised, involving graphs and terminology beyond my understanding. I do enjoy hearing clever people talk though, even if I can’t grasp exactly what they are explaining. A fascinating presentation by writer Nilanjan Choudhury on ‘The Square Root of a Sonnet’, his play which explores the fraught personal relationship between the brilliant Indian-American astrophysicist Subrahmanyan Chandrasekhar and his mentor, Sir Arthur Eddington of Cambridge University who publicly humiliated him at a Royal Astronomical Society meeting 90 years ago to the day. Guardian Article here

Dr Jessica Irving (Bristol University) gave The Harold Jeffreys Lecture on ‘Hearing planetary hearts: seismology of the cores of Earth and Mars’. An engaging speaker, she led us through the milestones of the last 130 years of theories on what is at the centre of the Earth and the discoveries made using seismology.

Dr Chris Lovell (University of Portsmouth) spoke on his research into ‘Accelerated modelling of the entire observable Universe’. I recognised the dark matter simulations and was fascinated by the different views of a galaxy depending on the band of the light spectrum used to observe it.

I joined a sobering Royal Astronomical Society webinar We Need to Talk About Space Junk presented by Professor Mike Lockwood. Our use of space is increasingly limited and threatened by space junk. The concern is that we are heading towards a runaway effect called the Kessler syndrome, in which the debris from one collision causes many others, to the point where space becomes unusable.

I went to see the fast paced RSC production of Kyoto at Soho Place. Welcome to the Kyoto Conference Centre, 11 December 1997. The nations of the world are in deadlock and 11 hours have passed since the UN’s landmark climate conference should have ended. Time is running out and agreement feels a world away. The greatest obstacle: American oil lobbyist and master strategist, Don Pearlman… Set nearly 20 years ago its depressing how little progress was made and we are currently sliding backwards. Would never have guessed it at the time but now am nostalgic for the politics and positivity of the 90’s.

Time to email your MP to join The All-Party Parliamentary Group for Dark Skies. The group’s primary focus is to preserve the night sky within the UK and promote the adoption of dark sky friendly lighting and planning policies. Surprisingly the committee is made up mostly of tories – come on the rest of you!

Go to this link where it is quick and easy to message your MP to act on this important issue.

Watching Chris Packham’s The Wonder of Animals – Foxes A red fox catches its prey using more than pinpoint hearing and an accurate pounce: it also involves alignment to the slope of Earth’s magnetic fields. I contacted Peter Hore FRS, Professor of Chemistry and Magnetoreception expert at Oxford University who was so helpful to me before in explaining how birds ‘see’ the magnetic field to see if he had come across any new research on this. He has pointed me in the direction of other research conducted by the group looking at fox behaviour so this is something I will pursue further.

Listening to What? Seriously?? with special guest Helen Sharman, the first British astronaut, about how humans learned to survive in space. Quite a few animals were sent to space before humans including two Russian Steppe tortoises (Testudo horsfieldi), who did a circuit of he moon and returned to Earth – alive but starved. The tortoises were chosen as they have a unique ability in the animal world to resist radiation and their blood may be useful in the treatment of radiation sickness. In recent research a string of amino acids have been extracted from the blood of these tortoises and if you inject those amino acids into other animals they become radiation resistant too.

Listening to The Year in Science 2024 podcast – One of the UK’s first military communication satellites’ Skynet 1a launched in 1969 was abandoned a few years later above Africa. Orbital dynamics should have dragged it out somewhere above India but it has been found wandering above the Americas in a busy area of live satellites and no-one knows why. Space consultants think it must have been commanded to move in the 1970’s but can find no record of this and although research has been undertaken it is still a mystery how this satellite moved. BBC article

There is no mention of a cosmic ray interaction forcing the command, but that would be my theory!

Editing footage for the video Belly of a Rock which will be shown on an old monitor encased in a sculptural hybrid form relating to both mollusc and rock. The giant sea slug of the mollusc family, can derive directional cues from the magnetic field of the earth which is then modified in response to the lunar cycle. It orients its body between north and east prior to a full moon. In the slug’s nervous system, four particular neurons are stimulated by changes in the applied magnetic field, and two are inhibited by such changes suggesting that the animal uses its magnetic sense continuously to help it travel in a straight line.

The Earth can be divided into the inner core, the outer core, the mantle, and the thin crust. The outer core is about 1,367 miles thick and mostly composed of liquid iron and nickel. It is very malleable and in a state of violent convection. The churning liquid metal of the outer core creates and sustains Earth’s magnetic field. At the boundary between the inner and outer core temperatures can reach 6,000° C which is as hot as the surface of the sun. The inner core is a dense ball of mostly iron, but with a temperature above the melting point of iron, it is not liquid or even molten. Intense pressure from the rest of the planet and its atmosphere prevents the iron inner core from melting as the iron atoms are unable to move into a liquid state. It could be described as a plasma behaving as a solid. The inner core rotates eastward, like the surface of the planet, but it’s a little faster, making an extra rotation about every 1,000 years.  Geoscientists think that the iron crystals in the inner core align north-south, along with Earth’s axis of rotation and magnetic field and are arranged in a hexagonal close-packed pattern. The orientation of the crystal structure means that seismic waves travel faster when going north-south than when going east-west. Seismic waves travel four seconds faster pole-to-pole than through the Equator. 

The Earth is still cooling and as it does so, bits of the liquid outer core solidify or crystallize causing the solid inner core to grow by about a millimetre every year. The growth is not uniform, it is influenced by activity in the mantle and is more concentrated around regions where tectonic plates are slipping from the lithosphere into the mantle, drawing heat from the core and cooling the surrounding area. The crystallization process is very slow, and further slowed by the constant radioactive decay of Earth’s interior. Scientists estimate it would take about 91 billion years for the core to completely solidify but the sun will burn out in just 5 billion years. 

I have nervously passed the cosmic ray detectors over to programmer Jamie. It was hard to let them out of my sight after so much work to get them built but he can’t test the code he has written without them. The Breath of Stars directly interacts with cosmic rays in real time to trigger a digital reaction via a mini computer attached to a block of plastic scintillator and a sensitive photomultiplier. As each particle strikes the plastic scintillator its energy is recorded and a starburst image video relative to the energy released is projected, with the largest images representing the particles with the highest energy.

I am constructing an Obelisk sculpture in response to the concrete obelisk erected in 1955 at Hartland Magnetic Observatory, near the site’s northern boundary as a permanent azimuth mark. It is viewed via a theodolite through a window in the north wall of the Absolute Hut, its azimuth being 11º27’54” E of N and marks the point from which the magnetic north pole is tracked as it drifts westwards. Layers of torn recycled paper are stacked like sedimentary rock that holds clues to the Earth’s magnetic field reversals in its strata.

Copper contours of magnetic field lines have been lacquered to preserve the heat patina from plasma gun cutting. These shapes will be pinned to the north facing mossy wall of the Absolute Hut installation, a reimagining of the Absolute Hut at Hartland Magnetic Observatory. I will also employ a north facing window from which to observe the azimuth mark of the Obelisk sculpture.

A second research visit to RSPB Snettisham, this time to see the pink footed geese (which over winter on the mudflats here) leave their roost at dawn to fly to the fields to feed.

The walk from the car park to the viewing area is over 2km and takes about half an hour to walk. Setting out before first light the weather felt promising but just as I erected the camera tripod the rain came down hard and didn’t stop for the rest of the morning.

Made a second attempt the next morning leaving a little earlier and although it remained dry there was heavy fog over the sea. Not great for filming with my very basic kit but very atmospheric to experience as the geese emerged from the sea mists.

The noise they make is incredible, a constant chattering building to a crescendo of honking calls as they rise from the water and swarm across the sky in their hundreds. They come in waves but look like particles. At one point what sounded like a few gunshots fired out across the bay in the distant darkness. This sudden disturbance set off a slow deep rumble which drew closer accompanied by a low dark cloud growing heavily stronger building and rising as a huge tidal wave of geese rose simultaneously into the sky in panicked disarray. Extraordinary to witness.

Birds are able to “see” Earth’s magnetic field lines and use that information for navigation. Their compass ability comes from a quantum effect in radical pairs, formed photochemically in the eyes. This light sensitive magnetic compass used by birds is affected by the polarisation direction of light. Exposure to blue light excites an electron, which causes the formation of a radical-pair whose electrons are quantum entangled, enabling the precision needed for magnetoreception.

In chemistry a radical is an unpaired electron which is can be highly chemically reactive. In the radical pair mechanism a pair of electrons with opposite spins have a chemical bond. Light can cause the electrons to change spin direction which can break the bond giving the electron a chance to react with other molecules. In magnetoreception two cryptochrome molecules, found in the rod cells in the eyes of birds, each with unpaired electrons, exist in states either with their spin axes in the same direction, or in opposite directions, oscillating rapidly between the two states. That oscillation is extremely sensitive and can detect the weak magnetic field of the Earth. Birds then move their heads to read the spin of the molecules and therefore detect the orientation of the magnetic field.

While in North Norfolk staying in a beach chalet away from light pollution I was able to make a couple of short time lapse videos centering on Polaris.

Birds can detect the slow arc of the sun and the rotation of the constellations across the sky which is imperceptible to humans and allows migrating birds to orient themselves using celestial navigation as well as magnetoreception.

Birds are also able to detect rapid movement such as individual flashes or flickering of a fluorescent light which humans see as a continuous light. Hawks which pursue other birds through dense forests at high speeds, follow the movement of their prey while avoiding branches and other obstacles. To humans travelling at this speed, the fleeing prey, branches and obstacles would just be a blur.

Gallery Visit

Thames-side Gallery ‘The Accurate Perception Available When Our Eye Becomes Single’ is an immersive multi-screen installation evoking the emotional specifics of place (Orford Ness on the Suffolk coast) while exploring the elasticity of time and history. It is an audio-visual collaboration between Richard Ducker (video) and Ian Thompson (sound) with no linear narrative; sound and image are not synchronised, so each viewing is a unique experience. Sarah Sparkes also makes an enigmatic performative appearance both in the video and live in the gallery.

The crashing sea on shingle, open spaces and brutalist bunker architecture of Orford Ness are echoed in the gallery with audio pitched to envelop and resonate but not overwhelm. Nicely done.

Listening

I really enjoy the Inside Science podcasts with Gaia Vince and this one interviewing cosmologist and theoretical physicist Laura Mersini-Houghton about finding evidence that supports her multiverse theory was particularly fascinating.

Multiverses, melting glaciers and what you can tell from the noise of someone peeing

According to Laura the single universe theory is mathematically impossible.

Reading

Merlin Sheldrake’s Entangled Life. A remarkable reveal of an other world, so different yet so entwined with our own. Beautifully clear analogies help to bridge an understanding between human and fungi.

The ability to detect and respond to chemicals is a primordial sensory ability.

In humans when a molecule lands on our olfactory epithelium and binds to a receptor it causes nerves to fire triggering thoughts and emotional responses.

A mycelial network is one large chemically sensitive membrane: a molecule can bind to a receptor anywhere on its surface and trigger a signalling cascade that alters fungal behaviour.

Fungal lives are lived in a flood of sensory information.

They have light receptors, are sensitive to touch and it also looks like fungi may form fantastically complex networks of electrically excitable cells – a potential ‘fungal computer’ using electrical signalling as a basis for rapid communication and decision making which could learn and remember.