3D-ing

Aside

Here’s another reblogged post from Land of Iron volunteer Adrian Glasser. This one is about his photogrammetry turntable prototype – a turntable should make photogrammetry modelling a whole lot easier. The Land of Iron are using photogrammetry as much as possible in order to model the remains of local ironstone industry structures and associated features in 3D (see Land of Iron Sketchfab page).

2D image of (Land of Iron) rusty bolt - from Sketchfab.com

See Adrian’s recent blog post by clicking here.

Smelted chocolate

Aside

The Land of Iron has been working with Adrian Glasser, a local volunteer with a lot of technological expertise, on a number of experiments. One recent success has been reinventing the moulding of pig iron, this time in chocolate.

‘Pig iron’ was liquid iron ore run into series of moulds coming off a main running channel which resembled a sow suckling piglets – hence the name – and then cooled. This basic product from the initial iron smelting in a blast furnace could be quickly produced and then easily transported for further refining into wrought iron or steel.    

Production of Pig Iron. Copyright Kirkleatham Museum.

You can find out exactly how Adrian and Tom (Land of Iron Programme Manger) used one of the last surviving pig irons from the Grosmont Ironworks to come up with an edible Land of Iron treat. See Adrian’s recent blog post by clicking here.

Land of Iron logo

Woodland enterprise

Raincliffe Wood Community Enterprise was set up back in 2016 to take on the management of Raincliffe, Forge Valley and Row Brow Woods near Scarborough. Their mission is to build a strong community enterprise that secures a safe and sustainable future for the woods while enhancing wildlife and community benefits.

 

They’ve been working ever since to restore these ancient woodlands to predominantly broadleaf with all the biodiversity benefits that brings to this important area. Part of it is a National Nature Reserve and the area also includes the Raincliffe & Forge Valley Woods Site of Special Scientific Interest (SSSI) because of its sequence of woodland types rich with botany, birds and other animals. The historic environment is also full of features related to past industry and endeavour such as charcoal platforms and a forge. The Community/Social Enterprise aspect means income generated through woodland management today is used to help make the ongoing management sustainable and also to provide associated activities such as improving access, increasing community involvement and providing education.

 

Recently the National Park Authority have been working with Raincliffe Wood Community Enterprise (RWCE) and others to carry out works in the woods to get rid of litter, keep access open, and tackle rhododendron. Have a look at the RWCE’s recent Working Together blog post to find out more and to keep up to date about future plans.

Raincliffe Woods - https://www.raincliffewoods.co.uk/

Traversing the Esk

Christopher Watt – River Esk Project Officer

Hi there, I’m Chris and I’ve just recently joined the National Park Authority as a River Esk Project Officer, having moved down from Scotland, and seemingly brought the weather with me! My role will involve working with farmers and landowners to implement river restoration techniques that seek to improve the water quality of the River Esk catchment.

Over the last month I have started to piece together the Esk catchment, worked with volunteers in delivering practical tasks and began undertaking fish obstacle river surveys. It has certainly been a varied introduction to the role and area.

Autumn colours in Westeredale. Copyright NYMNPA.

Volunteers braved the drizzly elements back in October to repair a broken fence on the River Esk, near Castleton. Thankfully, the task allowed us to remain on dry land and avoid venturing into the river which was rather swollen after recent heavy rainfall. A bankside tree had fallen and crushed a section of the fence-line, slackening the wire and dislodging posts. The volunteers assisted with installing new posts, including a heavy duty straining post, re-attaching the wires and finally tightening them. The volunteers worked extremely hard and it was a pleasure to meet and work with them. The task was also completed in one afternoon and the sun even came out, which is a bonus!

This task was one of the many on-going works to restore and enhance the riparian habitats of the River Esk. Maintaining riverside fences assists in keeping cattle and sheep away from the bankside vegetation and so causing sediment loading through erosion. Bankside vegetation stabilises the soil and is an important habitat in its own right. The reduction of sediment loading should help improve conditions for conservation priority species such as Atlantic salmon (Salmo salar), Sea trout (Salmo trutta) and Freshwater pearl mussel (Margaritifera margaritifera) which favour clean, fast-flowing rivers and streams.

In combination to riparian habitat enhancements, we have also been undertaking fish obstacle surveys stretching from Westerdale down  to Goathland. These involve inspecting an assortment of obstructions from weirs, fords and culverts and assessing how severe they impinge on fish migration. At each obstacle the length, width and height are recorded, along with a written assessment of the level of severity the obstacle poses to migrating fish populations.  

Esk Catchment weir after high rainfall event. Copyright NYMNPA.

Due to recent high rainfall, many of these obstacles have been partially or fully submerged, and although looking dramatic, have been just too dangerous to take measurements from. Electro-fishing will also accompany these surveys at a later date to inform us about fish species diversity and abundance at each obstacle. The purpose of these surveys is to update our records on obstructions across the catchment and prioritise where mitigation measures would best be targeted to benefit fish populations of the Esk. Migratory fish are a vital aspect of the biodiversity of the river.

Esk Catchment culvert and ford system. Copyright NYMNPA.

Planting for the future: Part Two

Alasdair Fagan – Woodland Creation Officer

In a previous blog I talked about the importance of collecting and growing on tree seed from the North York Moors and the benefits of a combined genetic approach to planting woodlands to provide them with the best chance of withstanding climate change impacts in the future.

It is now widely accepted that tree planting has a major part to play in helping to offset the emissions contributing to global warming. The UK is committed to reducing carbon emissions by 80% (compared to 1990 levels) by 2050. A recent study by The Crowther Lab of ETH Zurich suggests that a global effort to plant one trillion trees can have a huge potential to tackle climate change. 

The 25 year Environment Plan released in 2018 outlines governmental ambitions to plant 11 million trees in new woodlands by 2021 through national grant schemes such as Countryside Stewardship and the Woodland Carbon Fund administered and regulated by the Forestry Commission.

The sequestration of carbon is one huge benefit provided by trees, but planting trees can have numerous smaller scale advantages too including;

  • Significant benefits to biodiversity
  • Creation of a priority habitat
  • Reducing soil erosion
  • Reducing the flow of water downstream
  • Providing shelter to livestock and game

Which leads me onto Woodland Creation in the North York Moors …

Between 2000 and 2017, this National Park saw the planting of over 150 hectares of low density wood pasture/parkland and over 560 hectares of new native woodland; that equates to the planting of over 622,400 native trees!

Looking forward, we have ambitious targets to create 7,000 hectares of ‘environmentally positive’ new woodland over the next 100 years. This will mean we’d plant over 7 million trees! This will increase woodland cover from 23% to 25% of the National Park.

Skipster Hag - woodland creation project planted in 2012. Copyright NYMNPA.

But we’re not gung-ho about it. Every woodland creation proposal is carefully planned and there are many considerations to be examined and consultations to be carried out during the developmental stages of each individual project. Things to think about include:

  • Existing ecology and habitats
  • Existing archaeology and cultural heritage features and records
  • Current land sse
  • Soils
  • Woodland networks in the landscape
  • Public Access and Rights of Way
  • Landscaping impacts
  • Impacts on groundwater
  • Appropriate species
  • Provenance of seed/trees
  • Future impacts of Climate Change (ESC tool)
  • Tree pests and diseases (chalara, alder rust etc)
  • Land designations (e.g. SSSI, SAC, SPA)
  • Open Access Land
  • Parish Council
  • Inclusion on Public Register
  • Neighbouring landowners
  • Environmental Impact Assessment (if over 2 ha)
  • Services

Planting at Oakley Side, Danby - to extend existing native woodland. Copyright NYMNPA.

Rievaulx - planting to restore ancient wood pasture habitat. Copyright NYMNPA.

Shadow Woodland - woodland plants such as bluebells show us where woodlands used to exist. Copyright NYMNPA.

Each project has its own issues and individualities. Here are three examples of woodland creation projects over the last couple of years.

Cam House, Bilsdale

This woodland creation project in Bilsdale is a large planting scheme of over 15 hectares. There are 17,825 trees planted of 18 different species.

The site varies somewhat in terms of hydrology with some areas being particularly wet. These areas are planted with species that prefer wetter ground (willows and alder) but the majority of the site is planted as diverse oak and hazel woodland, with other species such as birch, holly, wild cherry and crab apple included to provide maximum climate change resilience and benefit for biodiversity.

Aspen has been included to further futureproof the woodland against potential issues such as climate change and disease, after consulting the ecological site classification software for the site. This is an online tool used to calculate what the suitability of particular tree species are to potential planting sites. The tool uses information such as soil wetness, soil PH, wind exposure and climate data to estimate how well trees will grow. It also usefully has a future projections function which is linked to the Met Office’s future climate data, which allows us to try to predict how a changing climate might alter the site and suitability for tree species – some will become less suited to the site and others will become more suitable, such as aspen.

Planting at Cam House, Bilsdale. Copyright NYMNPA.

 Ayton Banks

Ayton Banks is a site that is extensively covered in dense stands of bracken. The landowner’s primary objective for the planting is to sustainably control the bracken long term whilst creating a diverse woodland habitat. 8,610 trees were planted across 5.43 hectares using site appropriate native species such as oak, hazel, birch and rowan.

The wider Ayton Banks site is an historic Alum Works, now a Scheduled Monument. The proposals for woodland planting were carefully developed with the National Park Authority’s Historic Environment Team to ensure that none of the sensitive areas of the monument are influenced by the project.

Planting at Ayton Banks. Copyright NYMNPA.

 Howe End, Danby

This lowland planting project presented the perfect opportunity to work with volunteers and other groups due to its proximity to our National Park Centre at Danby, the ease of access and parking, and the cooperation of the landowner (who is a National Park Volunteer).

3,500 trees were planted over two months by a wide variety of volunteer groups as well as local primary school children, National Park staff and apprentices.

Planting at Howe End, Danby. Copyright NYMNPA.

If you have a potential Woodland Creation project in mind then please visit our website page for more information or contact me via the National Park Office 01439 772700 or by email.

Electrifying activities

Victoria Franklin – Conservation Trainee

Last week some National Park Volunteers (all fully trained) have finally been able to carry out the first electro fishing surveys this year along the River Esk. Delays had been caused by the weather.

The priority are sites up and downstream of the Sewage Treatment Works (STW) and one Combined Sewer Overflow (CSO) in the upper catchment. The first day of surveying was at Commondale.

The concept of electro fishing is to collect samples of fish living within the river, the higher the fish count the healthier the river should be. This will also show the type of fish living in our rivers, the cleanliness of the river and theoretically what the invertebrate population is like along that stretch of river.

The river levels had settled down by Thursday meaning the water was back to a slow flow and all the previous rain had made the water clear giving the perfect conditions for electro fishing.

We fished the river in two 50m sections, one upstream and one downstream of water treatment works. This was done using a zig zag motion to ensure that no area was left unfished. Each 50m section was fished three times to ensure a fair population of fish were caught.

Esk electro fishing October 2019. Copyright NYMNPA.

The equipment used to stun the fish is called an electro fisher and consists of a positive charge the anode at the front and a negative charge called the cathode which trails along the back. These are both attached to a battery which is worn by the person conducting the fishing, today it was Volunteer Paul. Both the anode and the cathode must be in the water to cause an electro charge which is what stuns the fish, but don’t worry rubber thigh waders were worn by everyone so the electro pulse did not affect us humans like it did the fish. The rest of us were in charge of catching the stunned fish in nets alongside the anode, which is harder than it looks as the fish soon spring back to life! They are then transferred into a bucket from the nets.

Esk electro fishing October 2019. Copyright NYMNPA.

We set the voltage output at 150- 200 volts which is enough to temporarily stun the fish making them easier to catch in the net. Once the section of river has been fished the data collection begins. The fish are identified – on this day we found 57 trout downstream and 104 upstream with the largest being 180mm and the smallest recorded at 52mm. The information collected will now be analysed before being sent onto Yorkshire Water, they will then compare this with the other locations which are due to be fished over the next few weeks, and that will all help inform management of their sites as necessary.

An amazing day was had by all the volunteers and staff that attended. More data collection will happen in the next few weeks on different sites along the Esk.

Esk electro fishing October 2019 - small trout. Copyright NYMNPA.

Goodbye to all that

Gallery

This gallery contains 13 photos.

Kim Devereux-West – Land of Iron Cultural Heritage Assistant It’s that time already; my two year contract with the Land of Iron is almost over! With only a few days left on the clock I wanted to take a moment to … Continue reading

How to be an archaeologist…

Sara Goodridge – Land of Iron Archaeological Finds Intern

This summer I have been granted the privilege of working with the Heritage Fund‘s Land of Iron Landscape Partnership as an Archaeological Finds Intern, through the Santander Internship Programme at Durham University. The internship has provided a unique opportunity to not only learn all about the inner workings of community archaeology but also to expand my knowledge of the beautiful North York Moors National Park and its industrial heritage.

When the email advertising the post of intern landed in my inbox, I was intrigued, I knew nothing about archaeology other than what I’d seen on the television and in text books but I knew I wanted to learn more. As a student of History rather than Archaeology my knowledge of what the internship would involve was very limited to say the least, despite this I decided to go for it – after all if you don’t try you don’t achieve. However, I felt my desire to learn may not be enough to secure me the position so I turned to the North York Moors National Park website for some much needed research. It is here that my journey began as a volunteer. Having followed the registration process I signed up for the day hoping for a crash course in how to be an archaeologist in time for my intern interview the following week.

I arrived eagerly at a car park in the middle of the moors ready to learn all about archaeological recording. As it turned out the welcome was incredibly friendly and I was expertly guided through a whistle stop tour of archaeological contexts and features. This very first day’s volunteering introduced me to the friendly approach taken by all involved in the Land of Iron Partnership and from that moment on I was hooked. The site of my first ever archaeological experience was at the former Rosedale Railway and inspired the Historian in me to find out more.

Rosedale saw rapid development in the later part of the 19th century due to ironstone mining. By 1861 the Rosedale Railway had been built, with the additional Rosedale East Railway branch completed in 1865, in order to export the iron ore north to Teesside and County Durham. An estimated 11 million tons of iron ore was removed from Rosedale. The opening of the Rosedale Railway way was documented in the Newcastle Journal on the 19 April 1862, and describes the importance of the railway coming to Rosedale;

“The opening of the North Eastern Company’s branch line to Rosedale, by the vice-chairman, George Leeman, Esq., and the directors, took place at Rosedale on Wednesday.  Early in the forenoon a large party arrived by special train from the northy, including the directors of the company and many of the iron masters, and other distinguished persons connected with the great iron trade of cleveland and the district…  After inspecting, with delight and astonishment, the Rosedale Mining Companiy’s magnificent quarries and mines of magnetic ore, the whole party retired to the Crown Inn, Rosedale Abbey, where an excellent dinner awaited them”.
(Extract transcribed by Linda Cummings)

Photo credit; Rosedale Mines and Railway (Hayes and Rutter, 1974)The experience of that volunteering confirmed my desire to learn more about archaeology and made me want to secure the position of intern even more. Luckily my interview for the position was a success! In the meantime I didn’t have to wait long to volunteer again as the Land of Iron community excavation at Combs Wood this summer provided me with the opportunity to not just learn about archaeology from the side of a trench but to actually get in and start digging myself. Over the two week period that the excavation ran I volunteered for a couple of days each week. In these days the knowledge I gained was immense I learned everything from the complexities of measured drawing to the correct use of a trowel. The approach on site, that no question was a silly question, meant that I spent my whole time learning.

Due to my experiences volunteering before my internship had even started I had learned valuable skills and felt ready to take on the finds processing role. Along with my fellow intern Louis we’ve now spent the last five weeks engaging with and learning from the finds that have been discovered across the numerous archaeological sites within the Land of Iron. Louis’s recent blog, The Everyday, the Intriguing and the Odd shows some of the more unique and interesting finds that have crossed our desk so far and is a must read for anyone who wants to find out more about some of these finds.

The industrial heritage of the North York Moors National Park has become a new found fascination for me, in particular the material culture of the Victorians has certainly sparked some interesting conversations between myself and Louis as well as with volunteers during our task days. So much so that I have decided to use the subject for my dissertation when I return to university for my third and final year at Durham in October. The knowledge I’ve gained so far during my time as an intern has been invaluable however it is only the beginning of my research.

Land of Iron logos

If, like me, you have a desire to learn more about the Land of Iron there is an upcoming Heritage Open Days on 15 September with a walk and talk through the incredible ironstone industry (Grosmont to Esk Valley). For more information and to book tickets visit the National Park website.

Standing up for standing stones

Nick Mason – Archaeology Officer

In the last couple of Monuments for the Future inspired blogs, we’ve looked at the hillforts and barrows of the North York Moors. This time we’ll ponder another monument type which often springs to mind when we think of prehistoric archaeology visible in the landscape today: standing stones.

The North York Moors has an abundance of stones set upright in the ground for various reasons. Not all of these stones are prehistoric: indeed the Historic Environment Record records 161 individual stones across the park recorded as ‘standing stones’, of which 129 are of likely prehistoric origin. But there are a further 1459 monuments recorded as ‘boundary stones’ with a medieval or later explanation. The distinction between standing stone and boundary stone is not always completely clear, as we shall see below, but these figures do mean that erected stones of one sort or another account for approximately 8.5% of all recorded monuments in the North York Moors. Let’s not even think about the number of historic gateposts out there…

People started to erect standing stones across the country in the late Neolithic period (2500-3000 BC), and carried on doing so up to the end of the Bronze Age around 700 BC. Like much of prehistoric archaeology, it can be very hard to know what was going on and to impose definitions on these big lumps of rock. Sometimes multiple stones are used in conjunction to create circles (often referred to as henges) or other shapes, or long rows stretching hundreds of metres, and then others stand alone. But why were people doing this?

It’s a long running joke in archaeology that if we don’t understand the function of a feature then it must be part of a long forgotten ritual, but for many surviving prehistoric features it seems that that is the most likely explanation. Some stones are associated with other features, such as a large slab next to a bridleway over Danby Rigg which forms part of a cairn under which Victorian archaeologists found deposited urns. Others accompany barrows, pits or stone-lined chambers. The common theme so far is death and burial: were people using standing stones to mark the spots belonging to the dead? were they a commemoration, in the same way we use gravestones and memorials today? or perhaps the stone warned others not to get too close…

Danby Rigg standing stone and ring cairn. Copyright NYMNPA.

Whilst many stones may have been raised to honour the dead or perform ritual practices around, others may have had a more mundane but useful purpose. If you’ve been out and about on the moors you’ll know how disorientating they can be, especially in bad weather. The last thing you want to do is get lost and stumble into someone’s barrow, and so we think some stones might have been erected as way markers, as a familiar point in the landscape to meet at or to help get you home.

Over time, some stones gathered cup and ring marks, and people buried items around them. These stones might be crossing the gap between the sacred and the profane, a physical object people can relate to, but which represents far more than the sum of its parts.

I mentioned at the start that there is not a clear distinction between some standing stones and modern boundaries. Some continue to have a function today, having been re-used by people looking to make their mark. A great example is the Cammon Stone, which stands on the parish boundary between Bransdale and Farndale West. This was initially erected on the watershed by prehistoric inhabitants of the area, perhaps marking a territorial boundary or route. At some point in the post-medieval period letters were carved into it, proclaiming the land ownership to anyone who came past. Then in the 19th century someone wrote ‘Hallelujah’ on it, followed by the Ordnance Survey who inscribed a survey benchmark into the base! So over the years the Cammon Stone has served as a boundary symbol for different cultures, in multiple religious functions, and as part of the very modern practice of mapping.

Cammon Stone with inscriptions. Copyright NYMNPA.

 

Cammon Stone with further inscriptions. Copyright NYMNPA.Another stone which might represent different sacred uses is Low Cross, just north of Appleton-le-Moors. This curious piece of limestone, with a hole cut right through it, started life as a large prehistoric stone, but was transformed into a wayside cross by some enterprising mediaeval person. It probably served a very similar function in this role, reminding people of their religion and marking out a safe route. Since then it has fallen apart, a plaque seems to have come and gone, and it’s thought the hole might have been used to pay tolls, but it remains in place today as a lasting reminder of the people who once lived there. A 3D model of Low Cross today can be seen here – Low Cross standing stone by Nick Mason Archaeology on Sketchfab

All of this is why standing stones are so exciting to archaeologists – they stand in place today as physical emblems of the prehistoric, when so little else of those people remains. That’s why any examples which are in good condition are likely to be protected as Scheduled Monuments. All of those mentioned in the text here are Scheduled, and as solid as they may seem, sometimes they need some work to look after them. Unstable ground, visitor numbers, even cattle can cause a stone to become threatened. Work was recently carried out to reinstate one of the Newgate Foot stones which had fallen over. This project restored the collection of stones (which might be a small henge monument) closer to what they originally looked like. This is a more complex operation than it sounds, as the ground had to be carefully prepared and excavated to ensure that deposits which might give us valuable dating evidence were not being disturbed.

A similar operation was carried out on Wade’s Stone near Lythe, a monument with giant-related folklore ascribed to it.

If you’d like to see some archaeology and take in a breath of fresh air there are many popular walks around the North York Moors which pass close to prehistoric monuments as they run along the higher ground. As ever, you can always find out more about the fascinating past of the North York Moors using our interactive Historic Environment Record map, so why not find your closest monument and pay a visit. The Monuments for the Future project is always on the look-out for monuments at risk, so don’t hesitate to get in touch if you think a standing stone needs some attention. You can always volunteer with the National Park if you’d like to help with conserving our monuments.

Seeds for the future

Alasdair Fagan – Woodland Creation Officer

In a previous blog, on the Year of Green Action, we mentioned the planting of 3,500 trees near Danby by National Park staff and volunteers. Our volunteers form an integral part of the work we are able to do, this is particularly the case with woodland work.

Last year saw the origins of the Acorn Volunteer Group. The task for this Group is to collect tree seed from the ancient woodlands and trees of the North York Moors to then be propagated and grown on at local tree nurseries with the ultimate aim of the trees being used in future woodland creation schemes throughout the area.

We focused in the first year on acorns as the National Park Authority has a bit of a history of acorn collecting and so we already knew some good spots to try. We managed to collect over 25,000 acorns. Going forward we are looking to diversify the tree species we collect to include species such as rowan, elder and wild cherry.

One of the North York Moors' oldest Ancient Oak Trees. Copyright NYMNPA.

So why is collecting tree seeds important?

There are ongoing discussions in the world of woodland and forestry about what is the best approach for new woodland planting – whether it should be young trees grown from seed which has been collected from the local area (‘local provenance’) or trees grown from seed sourced elsewhere in the country e.g. further south.

Local provenance seed has benefits such as being from trees which we know grow well on a kind of site or in a particular area , but seed from a more southerly zone has the potential to be better suited in the future because of an increasingly warming climate.

The predictions for climate change vary in severity based on the potential for carbon dioxide and other greenhouse gas emissions, but what is certain is that our summers will be warmer and drier (this is especially true in the east of the Britain) and our winters will be wetter. This means that the climatic conditions of the places where we are planting trees today to create woodlands could be significantly different in 100 years time. 100 years is not a long time within the lifetime of a woodland. Woodland managers need to consider the effects of their work over these long timescales. Planning now to survive the effects of climate change is essential to give our woodlands the greatest chance of reaching maturity.

Skipster Hagg. When the right site is chosen to plant woodland the rate at which the young saplings grow can be surprising. Copyright NYMNPA.

Ayton Banks. Stitchwort and bluebells growing on a site with newly planted trees. These woodland indicator plants grow on woodland soils and show where woodlands once existed. Copyright NYMNPA.Currently the advice for woodland managers is that the best approach depends on the characteristics of the site proposed. On sites where the woodland soils have remained relatively undisturbed, with intact woodland plant communities – such as bluebells and wood sorrel – planting local provenance trees is still the best choice, particularly if it is adjacent to an existing ancient woodland. However if the site is less sensitive then it makes sense to try and improve the woodland’s chance to withstand the effects of climate change and the resulting pests and disease as much as is possible; making the woodland more ‘resilient’.

This type of resilience is increased by having a higher number of tree species as more diversity means that any one pest or disease is unlikely to have a catastrophic effect on the entire wood. If you also incorporate into this diverse mix of tree species a mix of genetic stock, such as you would get from planting a mixture of trees sourced both locally and from further afield, then this is certain to improve a woodland’s chances of adaptation and survival in the future.

Setting up a seed collecting project is a way to make sure we have some locally sourced trees to plant, including some of the genetics of our oldest living trees. The project is also a great way to include volunteers and give them the opportunity to visit some of the ancient trees and woodlands hidden away in secluded parts of the North York Moors.

One of the many handfuls of acorns that made up the 25,000 that were collected in 2018. Photo credit – Tessa Bunney.

If you think you might like to sign up as an Acorn Volunteer with the National Park Authority then please contact me by email or ring me on 01439 772700.