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.
If you’ve read Jenny and Ashley’s posts you’ll be familiar with our research group and what we got up to at the Diamond Light Source. I’m Natasha, a PhD student researching the use of micro-computed tomography to investigate meteorites and extraterrestrial material. But more about that in a later post! For now I thought I'd talk about the kind of thing we get up at outreach events outside of the Museum, where we get to talk to you about our amazing specimens.
As the weather has been so lovely recently, it put me in mind of the bank holiday weekend on 2-4 May, when around thirty Museum scientists and science educators decamped to the Lyme Regis Fossil Festival in Dorset. This annual festival is a fantastic event for enthusiasts, families, and anyone with any curiosity about the natural world (plus it’s a great excuse for a pasty and ice cream on the beach!)...
Two of us from the meteorites team took a variety of specimens, ranging from the iron meteorite Henbury, through the chondrite Parnallee, to a particular favourite of mine – the Martian meteorite, Nahkla. Penny (our resident impacts expert) also brought along some aerogel, similar to that used on the Stardust mission, and even a piece of a solar cell from the Hubble Space Telescope!
Penny Wozniakiewicz manning the the meteorites stand at Lyme Regis Fossil Festival.
The photograph below shows some more of the beautiful mineralogical specimens we took along. Each of these minerals and ores is crucial in the production of mobile phones! This was a great opportunity to show the economic importance of geology, but also to raise some awareness about the energy, effort and raw materials required to support our dependence on technology.
Some of these very important metals are not easily found on Earth, that’s why they are called ‘rare earth elements’. However, we know from studying meteorites that they are a lot more common in some asteroids.
This was my second time going to the festival, and I really enjoyed it. Lyme Regis offers the perfect chance to not only share access to our fantastic collection (and see the excitement on children’s faces when you let them hold a piece of the Moon!), but also to chat to a wide variety of people about the sort of work we do behind the scenes at the Museum. I think it’s definitely fair to say that a fun time was had by all!
What is the Lyme Regis Fossil Festival?
The festival incorporates a huge tent full of stalls from all sorts of museums, universities, craft stalls, and fossil dealers, with a series of talks, geological walks and family entertainment (including a fossil themed puppet show!).
Palaeontologists, botanists, entomologists, mineralogists, and meteoriticists from the Museum make their way down to the coast to share some of our treasures. One particularly popular table gave visitors the chance to sift for their own shark teeth.
The Lyme Regis Fossil Festival runs every year over the early May Bank Holiday. You can find more information about the 2014 festival, and stay up to date with news on the 2015 festival here.
Last, but not least, I spotted this awesome knitted ammonite in case any of you are looking for a new crafty project …
Read more from our scientists about the Lyme Regis Fossil Festival:
One of my curatorial predecessors Randolf Kirkpatrick (1863-1950) thought that larger benthic foraminifera (LBFs) were so important that he published a theory that they were vital to the formation of all rocks on earth. Our collection of LBFs has received relatively little attention over the 20 years I have been at the Museum, but recently it has been the most viewed part of the microfossil collection.
Some images of larger benthic foraminifera (LBF) taken by Antonino Briguglio, a recent SYNTHESYS-funded visitor to our collections. The images represent specimens roughly the size of a small fingerprint.
Traditionally LBFs have been difficult to study but new techniques, particularly CT scanning, are changing this perception. This post tells the story of Kirkpatrick and explains how the collection is currently being used for studies in stratigraphy, oil exploration, past climates and biodiversity hot spots.
Larger benthic foraminifera (LBF)
Larger benthic foraminifera are classified as microfossils because they were produced by a single celled organism, but they can reach a size of several centimetres. Their study is difficult because it usually relies on destructive techniques such as thin sectioning to make precise identifications. My first line manager at the Museum Richard Hodgkinson was an expert at producing these thin sections. He described the technique of cutting the specimens exactly through the centre as an art rather than science. Sadly there are very few people in the world skilled enough to make these sections, but thankfully the Museum collection is packed with LBF thin sections available for study.
Randolf Kirkpatrick's Nummulosphere
Randolf Kirkpatrick was Assistant Keeper of Lower Invertebrates in the Zoology Department of the British Museum (Natural History), and worked at the Museum from 1886 to his retirement in 1927. He published on sponges but is most famous for his series of four books entitled The Nummulosphere that he had to pay to publish himself because his ideas were so unusual. In the Introduction to part four he writes:
'Fourteen years have passed since the publication of Part III of the Nummulosphere studies, but the scientific world has entirely ignored the work to its own real and serious loss... I think it not amiss to call attention to the financial aspect. Since its beginning in 1908, this research has cost me much over £2000, all paid out of a modest salary and pension, and certainly by a cheerful giver.'
Kirkpatrick developed a theory that at one stage Earth was covered with water and LBFs of the genus Nummulites accumulated into a layer he called 'The Nummulosphere'. He went on to suggest that all rocks we see now were subsequently derived from this nummulosphaeric layer and he figured examples in his books of supposed nummulitic textures he had seen in granites and even meteorites.
I think that Kirkpatrick would be very interested to hear that scientists are looking for evidence of life on Mars and that meteorites may hold the key to this. Obviously the evidence of life, if it arrives, is almost certainly not going to be a LBF. However, I think that if he were alive today, Kirkpatrick would be very interested to hear of the renewed interest in our LBF collection and that his earlier publications on sponges have also received renewed interest. These publications had been largely ignored because of his later publications of the Nummulosphere theory.
Image of palm-sized model of a nummulite made in plaster of Paris based on an original illustration by Zittel (1876), showing strands of protoplasm colonising its complex shell.
Find out more about Kirkpatrick from the Museum Archives or read the article entitled 'Crazy Old Randolf Kirkpatrick' by Steven Jay Gould in his book The Panda's Thumb: More Reflections in Natural History. Read on to find out about some of the projects that the collection has been used for.
Evaluating past climates and extinctions
Naturalis Biodiversity Center researcher Laura Cotton studied for her PhD in the UK and has been a regular visitor to our LBF collections. She borrowed some rock sample material from Melinau Gorge in Sarawak, Malaysia that was worked on by one of the leading LBF workers of the time, former Natural History Museum Palaeontology Department Associate Keeper Geoff Adams (1926-1995). It would have been almost impossible to arrange for this material to be recollected.
In a study published earlier this year, Laura carried out destructive techniques on these samples to release whole rock isotope data that has provided information about the position of an isotope excursion that relates to a period of global cooling and climate disruption. Laura showed that an extinction of LBFs previously described by Geoff Adams occurred prior to this isotope excursion, a situation she had previously described in Tanzania. This suggests that this Eocene-Oligocene extinction of LBFs is a global phenomenon, closely linked to changes in climate around 34 million years ago.
Boxes at our Wandsworth stores containing samples from which much of our larger benthic foraminifera (LBF) collection was obtained. Please note that the temporary box labels in this 2007 picture have now been replaced!
Most of our micropalaeontology rock sample collections are housed at our Wandsworth outstation and this project is a very good example of how duplicate samples are valuable resources for later studies using new techniques.
Studying hotspots of biodiversity in SE Asia
Naturalis researcher Willem Renema has been studying LBFs from SE Asia as part of a large multidisciplinary group including my colleague Ken Johnson (corals). The 'coral triangle' situated in SE Asia contains the highest diversity of marine life on Earth today. Back in time, water flowed from the tropical west Pacific into the Indian Ocean (Indonesian Throughflow) but this closed during Oligocene - Miocene times roughly 25 million years ago.
This interval in geological time is characterised by an apparent increase in reef-building and the diversification other faunas including the LBFs and molluscs, leading to the formation of the present day 'coral triangle'. The project aims to investigate how changes in the environment led to the high diversity of species present today.
Some slides from the Geoff Adams Collection from SE Asia scanned by Malaysian intern student Zoann Low.
Our LBF collections are very strong from this area of the world following the work of Geoff Adams. Two curatorial interns Faisal Akram and Zoann Low from Universiti Teknologie PETRONAS in Malaysia have helped greatly to enhance this area of the collection by providing images and additional data relating to Geoff Adams' collection and allowing us to prepare data to be released on the Museum data portal and for this 'coral triangle' project.
Supporting Middle East stratigraphy
One of our most important collections, the former Iraq Petroleum Collection contains many LBFs that help to define the stratigraphy of oil bearing rocks of the Middle East. Some significant early oil micropalaeontologists such as Eames and Smout of BP also contributed to the collection.
Recent donation from Oman of some Permian larger benthic foraminifera (LBF) of the genus Parafusulina.
A major publication on the collection by Museum Associate John Whittaker and others is being updated by John and a team of scientists including our own Steve Stukins and Tom Hill. We look forward to seeing this published in a major book in the next couple of years.
Atlas of larger benthic foraminifera
LBF worker Antonino Briguglio was successful with an application to SYNTHESYS, a European fund that facilitates visits to museum collections for European researchers. He visited us in March at the same time as Russian LBF worker Elena Zakrevskaya as part of work to compile an Atlas of LBFs. Antonino's work has included CT scanning LBF specimens and a video showing the architecture of the internal chambers of Operculina ammonoides:
CT scanning has opened up a whole new method for studying LBFs and made it much easier to create virtual sections through specimens without the need for expert and time consuming thin sectioning. We hope that our collection can be an excellent source for those wishing to CT scan LBFs and recently we were in negotiations with long term Museum visitor Zukun Shi who is studying fusuline specimens like the ones illustrated on my hand above.
This collection may never be as important as Kirkpatrick thought it was. However, it is a really excellent example of one that has become more relevant recently as new techniques are applied to its study.