Skip navigation

Manage categories

Close

Create and manage categories in Earth sciences news. Removing a category will not remove content.

Categories in Earth sciences news
Add a new category (0 remaining)

Manage Announcements

Close

Create and manage announcements in Earth sciences news. Try to limit the announcements to keep them useful.

Announcements in Earth sciences news
Subject Author Date Actions

Earth sciences news

Lyme Regis and Charmouth

Follow our posts for the latest news about the Earth Sciences Department, from the most recent publications, awards and conferences to updates from palaeontologists and mineralogists working in the field.

More about the Earth Sciences Department

Recent posts about the earth sciences

Refresh this widget
Apr 24, 2014 Teaching collections management and dodging spiders in Brazil

This March I taught a course on collections management at the University of Brasilia (UnB) in the capital of Brazil. The class included both undergraduate and postgraduate students studying Geology, Museology and Art, mainly at UnB. This is the third time that I have presented a similar course in Brazil with previous courses delivered at UnB and the Museu Goeldi in Belem.

 

After the course I asked the students 'what was the most important thing you learned?' To illustrate the course contents, a summary of their answers is included here. There is also a picture of some of the less friendly Brazilian inhabitants I encountered!

 

1-P1030480_blog.jpg

Me with some of the class in the display area of the Museum of Geosciences at the University of Brasilia.

 

The course draws on examples from my 20 years of experience in managing microfossil collections, but the principles covered are relevant to the management of a wide range of natural history collections. Previous classes have included entomologists, botanists and zoologists. This time many of the course participants were museology undergraduate students wanting to find out about managing scientific collections.

 

2.jpg

Just outside the Museum of Geosciences, University of Brasilia. This was my third visit to the university but it was the busiest and noisiest. It was Freshers Week so there were lots of noisy events including a student initiation just outside the window of the lecture theatre!

 

Rather than providing a dry summary of the course, I thought that I would precis/summarise some of the student feedback. I was also pleased to find that the students said I was understandable, delivered the course well and provided a good balance of lectures and practicals.

 

Some lessons learnt by the students:

  • Big and small museums face the same issues.
  • Curators must work hard to publicise and advocate their collections to maintain their relevance.
  • How to plan before acquiring objects for your collection.
  • Collections development and conservation plans are important.
  • Why it is important to try to register everything in your collection.
  • Thorough labelling and documentation is important because you don't know how a collection might be used in the future.
  • Data standards are important to help organise and manage a collection.
  • What the risks are for a collection and how they can be avoided.

3.jpg

The class discussing collections development ideas.


4.jpg

A trip to the UnB library to see the paper conservation unit.

 

5.jpg

A visit to the geology collections with Dr Maria-Julia Chelini. The students affectionately call this basement corridor The Dungeon!

 

As ever I was looked after amazingly well by my hosts, including Maria-Julia Chelini at the Museum of Geosciences and her husband Ricardo Pinto. While I was not lecturing I was a guest at the beautiful country house of my old friend Dermeval do Carmo. There were also some less than friendly inhabitants that helped to make it a very interesting visit:

 

6.jpg

My hosts called me to see this. I have tentatively identified it as a Brazilian wandering spider; aggressive and the world's most venomous spider according to Wikipedia. I am hoping someone will write and tell me I am wrong...

 

7.jpg

The amazing view from the country house of Dr Dermeval do Carmo who invited me to give the course and looked after me so well during my visit.

 

 

Finally I would like to quote directly from feedback of one of the students Anna Maria Amorim de Oliveira who neatly summarises the benefits of providing courses like this and makes reference to the fact that it wasn't just me talking all the time. We had some really great discussions too!

'For me the whole course was very relevant, because I think that any example of the Natural History Museum could be useful in another collection and it’s always amazing to have an opportunity to know more about other countries' experience, especially at one of the most important museums in the world. But in my opinion the first exercise about how to improve our museum was exciting, because it raised a very interesting discussion!'

Apr 15, 2014 The Jurassic Coast: fossils, history, value, and management
The Palaeontographical Society – 8th Annual Address   Dr Richard Edmonds (Jurassic Coast Heritage Centre) - "The Jurassic Coast: fossils, history, value, and management".   Wednesday 16th April – 4 pm (following immediately from
Mar 6, 2014 What our microfossil collection tells us about the earliest humans in Britain

On 13 Feb a new temporary exhibition opened here at the Museum entitled Britain: one million years of the human story. It includes some images of microfossils from our collection in the display.

Pollen_Montage2_blog.jpg

Scanning electron microscope (SEM) images of pollen grains from our collection that appear in the exhibition.

 

These and other microfossil collections housed behind the scenes help with dating the finds, reconstructing the environment, landscape and climate of these first human settlements in Britain and provide the climatic context for the recent discovery of the earliest human footprints in Britain on a Norfolk beach.

 

The AHOB Project and micropalaeontology

 

The exhibition highlights the work of the Ancient Human Occupation of Britain (AHOB) Project and its predecessor projects. The current project, funded by Calleva, is investigating the timing and nature of human occupation of the British Isles, the technology they used, their behaviour, the environment they lived in and the fauna sharing the landscape. The microfaunas and floras mentioned here were recovered by project researcher Mark Lewis and project associate member John Whittaker.

 

Mark is a palynologist and has used the distribution of pollen grains in the sediments surrounding the human finds to interpret ancient climates and landscapes. Pollen grains that range in size from 10-100 microns can be found in sediments millions of years after the plants that produced them have died and decayed.

 

The Museum collections

 

Mark regularly uses our collection of modern pollen and spores to interpret the pollen floras that he recovers as part of the AHOB Project. We recently transferred this collection from the Botany Department and the images in the exhibition were taken from the collection of SEM prints and negatives that accompanies that collection.

 

P1010652_closeup_drawer_pollen_smudge_blog.jpg

Part of our modern pollen collection. Slides are housed in special plastic sleeves and arranged by plant family name.

 

John Whittaker spent his entire career as a researcher here at the Museum and is a now a Scientific Associate in the Earth Sciences Department as well as being an Associate Member of the AHOB Project. In a previous blog post I highlighted his microfossil finds from three key early human sites at Boxgrove about 500,000 years old, Pakefield about 700,000 years old and Happisburgh (prounced Haze-boro) about 900,000 years old. Many of John Whittaker's microfossil slides are deposited here at the Museum.

 

Ancient landscapes

 

The pollen grain illustrations from the exhibition were chosen because of their use and importance in reconstructing ancient environments, particularly the vegetation dominating the landscapes in which the ancient humans lived. The scanning electron microscope images shown above from left to right are:

 

1. Dandelion-type e.g. Taraxacum - this herb indicates dry grassland or disturbed open ground

2. Dwarf willow, Salix herbacea - characteristic of rocky, open ground as found during cold periods

3. Montpellier maple, Acer monspessulanum - currently native to the Mediterranean and central Europe, this tree was present in Britain only during the last (Ipswichian) interglacial about 125,000 years ago

4. Bogbean, Menyanthes trifoliata - shallow water inhabitant of bogs and fens during both temperate and cold periods

5. Common valerian, Valeriana officinalis - herb indicating either dry or damp grassland as well as rough ground

 

Environments of deposition of sediments


Ostracods and Foraminifera collected by John Whittaker from Boxgrove indicate a marine raised beach and a later terrestrial deposit with freshwater ponds below chalk cliffs.

 

Boxgrove_freshwater.jpg

The saltmarsh foraminiferal species Jadammina macrescens has been recovered from Happisburgh and is consistent with interpretations that the site is situated near the mouth of the ancient large river, possibly the River Thames.

 

070314-2.jpgThe foraminiferal species Jadammina macrescens is common in saltmarsh environments.

 

The microfossils were able to show that the Slindon Sands were deposited in a wholly marine high-energy environment, whereas the Slindon Silts were deposited in a shallow intertidal environment at the margin of a regressive sea. This sort of information is vital when interpreting the archaeological finds from the site.

 

Ancient climates

 

River sediments containing flint artefacts have been found on the coast of East Anglia at Pakefield. The oldest artefacts came from the upper levels of estuarine silts where both marine and brackish ostracods and foraminifera have been recovered.

 

070314-1.JPGReconstruction of a scene at Happisburgh about 900,000 years ago by John Sibbick. (copyright AHOB/John Sibbick)

 

Other evidence from mammal, beetle and plant remains suggests a setting on the floodplain of a slow flowing river where marshy areas were common. The river sediments were deposited during a previously unrecognised warm stage (interglacial) and the presence of several warmth loving plants and animals suggests that the climate was similar to that in present day southern Europe.

 

Ammonia_batavus_Palaeoclimate_blog.jpg

 

Pollen and mammal fossils recovered from Happisburgh suggest that the climate was similar to that of southern Sweden and Norway of today with extensive conifer forest and grasslands. The floodplains were roamed by herds of mammoth and horses. Foraminifera such as the species Ammonia batavus are characteristic of warmer climates.

 

Evidence of reworking of some sediments

 

The interglacial sediments at Pakefield are overlain by a thick sequence of glacial deposits which include till and outwash sands and gravels. These contain reworked (Cretaceous and Neogene) microfossils transported from the North Sea Basin by glaciers. This is important information as fossils found in these redeposited sediments could be give false indications as to the climatic setting and dating of any finds.

 

Dating deposits

 

The dating of the deposit at Happisburgh is provided by a combination of mammoth, horse, beetle and vole finds as well as the Middle Pleistocene ostracod Scordiscia marinae. Work by John Whittaker and the AHOB team at a number of other Pleistocene sites across the SE of Britain has increased the potential of ostracods as tools for dating these sediments.

 

Scordiscia_marinae.jpg

The extinct freshwater ostracod Scordiscia marinae has been found at both Pakefield and Boxgrove and is

characteristic of the Middle Pleistocene period. An example of a microfossil that is useful for dating sediments.

 

Earliest footprints

 

A flint handaxe recovered from sediments recently exposed on the foreshore at Happisburgh provides part of the evidence for the earliest human occupation of Britain. Several other Palaeolithic sites have since been discovered there including sets of early human footprints on the foreshore that made the national news at the time of the opening of the exhibition.


Bytham_Thames.jpg

A Palaeogeographic map of Britain the in Early Pleistocene showing the land bridge between Europe and the position of the Thames and Bytham rivers. (Courtesy of Simon Parfitt and the AHOB Project)

 

Pinus-Picea HSB_blog.jpgPine (Pinus) and spruce (Picea) pollen recovered by Mark Lewis from the sediments that preserved the Happisburgh footprints.

 

Pollen analysis of the sediments adjoining the footprints revealed the local vegetation consisted of an open coniferous forest of pine (Pinus), spruce (Picea), with some birch (Betula). There were some wetter areas where Alder (Alnus) was growing; patches of heath and grassland were also present. These all indicate a cooler climate typical of the beginning or the end of an interglacial recognised at other Happisburgh sites.

 

Come and see the exhibition

 

I would recommend that you come and see the exhibition Britain: one million years of the human story if you can, before it closes at the end of September. If you can't then there are a wealth of interesting items on the Museum website including a video showing the recently discovered footprints.

 

Quite rightly the artefacts and larger fossil materials collected from these early human sites in Britain dominate the exhibition along with the amazing life-sized models like 'Ned the Neanderthal'. Hopefully this post has shown that there are many other undisplayed collections held behind the scenes here at the Museum that are just as important in telling us how, when and where the earliest humans lived in Britain.

Earth sciences blogs

Museum Science on Twitter

Actions

Notifications