In the 1820s a young geologist named Charles Lyell travelled around France studying the landscape and rock formations to try and work out the processes that created them.
In between these field-trips, he met the people who had been studying the geology of France and from these discussions and his observations he created The Principles of Geology, one of the first significant popular science books on the subject and a foundation for the methods of modern geology.
Lyell collected many samples from the rocks he studied, amassing thousands of fossils during his lifetime. The Museum has a collection of some 16,000 of them, around 90 per cent of which are shells, mostly gastropods (snails) and bivalves (clams), many collected during his travels in France.
The reason for this prodigious collection of fossil shells, or testacea as they were then known, was that Lyell believed them to be the most useful clue to understanding the Earth’s history.
The testacea are by far the most important of all classes of organic beings which have left their spoils in the subaqueous deposits : they are the medals which nature has chiefly selected to record the history of the former changes of the globe.
– Lyell’s Principles of Geology, Vol III, 1833.
Fossil shells can show how the animal that lived inside the shell behaved, and whether it lived on the land, in freshwater or in the sea. Species of shelled animals have a wide geographical range and individual species survive for a long time, so they can be compared across time and space.
This allowed Lyell and his colleagues to determine the relative ages of the rock layers that the fossil shells came from. He looked at the proportion of shells that belonged to living species and determined that the rock layers with the lowest proportion of living species were likely to be older than rocks with higher proportions of living species.
And so three main groups of rock layers were found: the Eocene, containing fewer than 4% living species; the Miocene, with fewer than 18% living species; and the Pliocene, with more than a third of living species.
Although what is now known as the Eocene (from 56 to 34 million years ago), Miocene (23 to 5.3 million years ago) and the Pliocene (from 5.3 to 2.6 million years ago) don’t denote exactly the same periods as Lyell described, we still use these terms for some of the youngest geological epochs today.
Britain’s Jurassic Coast is a famous location for fossil hunters. Dorset’s Lyme Regis in particular was a collecting ground for two very important Victorian palaeontologists – Elizabeth Philpot (1780-1857) and Mary Anning (1799-1847) – and the site yielded some of the earliest specimens of Ichthyosaurs and Plesiosaurs.
Last weekend Channel 4’s Walking Through Time series focused on the Jurassic Coast and featured two members of staff from the Museum, Eliza Howlett and Hilary Ketchum from our Earth Collections. To coincide with the programme, Eliza here delves into the Museum’s Philpot archive to paint a picture of the relationship between Elizabeth Philpot, Mary Anning, and Oxford University’s first Reader in Geology, William Buckland.
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Elizabeth Philpot moved to Lyme Regis around 1805 with two of her three sisters, Mary and Margaret, where they soon became involved in fossil collecting and where they remained for life. At this time Lyme-born Mary Anning was still a young girl, but so began an affectionate relationship with the Philpot sisters which transcended any barriers of age, social origins or educational background.
A letter from Elizabeth Philpot to Mary Buckland dated 9 December 1833.
As the Philpots’ fossil collection grew it became known in the geological community. One familiar visitor was William Buckland, whose earliest published reference to the ‘Miss Philpots’ is in his 1829 paper on the pterosaur found at Lyme by Mary Anning.
In one letter to Buckland’s wife, Mary, dated 9 December 1833, Elizabeth Philpot enclosed a sketch of an ichthyosaur head that she had painted using ink from a fossil squid of the same age as the ichthyosaur, 200 million years old; this is pictured at the top of the article. The letter also contained a colourful description of Mary Anning’s escapades:
Yesterday [Mary Anning] had one of her miraculous escapes in going to the beach before sun rise and was nearly killed in passing over the bridge by the wheel of a cart which threw her down and crushed her against the wall. Fortunately the cart was stopped in time to allow of her being extricated from her most perilous situation and happily she is not prevented from pursuing her daily employment.
Next, it sends a reminder to William Buckland, a man well-known for forgetting things:
May I beg you to remind Dr. Buckland that he has borrowed from me some Plesiosaurus vertebre. As it is some time since I will mention that it is a section of a vertebre, one with the process, ten others, and a chain set in a box.
These letters from Elizabeth Philpot are now held by the Museum, along with the Philpot collection of around 400 fossils. Mostly from Lyme Regis, this collection includes more than 40 type specimens, the reference specimen for a new species, which is a remarkable total for any collector. A brief list of people known to have examined the collection is practically a roll call of the key figures in 19th-century palaeontology: William Buckland, William Conybeare, John Lindley and William Hutton, Richard Owen, James Sowerby, and (from Switzerland) Louis Agassiz.
But the collection was also made available to the ordinary people of Lyme, and the handwritten labels by Elizabeth Philpot sometimes included detailed explanations of what these extinct animals would have looked like. Both the letters and the specimens remain deeply evocative today, conjuring up visions of what it must have been like to call on these three remarkable sisters.
Because of the risk of light damage the material is not normally on display, but it can be viewed by appointment. Email library@oum.ox.ac.uk or earth@oum.ox.ac.uk for more information.
As part of the Museum’s Visions of Nature year in 2016, we have had the pleasure of hosting three poets in residence: John Barnie, Steven Matthews, and Kelley Swain. During the year the poets worked alongside staff in the collections and out in the Museum itself to gain inspiration for their writing. A small anthology of the resulting poetry is published at the end of 2016.
In this video Steven Matthews reads his poem “Yet With Time’s Cycles Forests Swell”. The title is taken from a line in a poem called Emblems by one the founding members of the Pre-Raphaelites, Thomas Woolner.
As part of the Museum’s Visions of Nature year in 2016, we have had the pleasure of hosting three poets in residence: John Barnie, Steven Matthews, and Kelley Swain. During the year the poets worked alongside staff in the collections and out in the Museum itself to gain inspiration for their writing. A small anthology of the resulting poetry is published at the end of 2016.
In this video Kelley Swain reads two of her poems To The Palaeontologists and Rorqual. Kelley is a poet, writer and editor.
You can meet Kelley at the Museum for National Poetry Day on Thursday 6 October 2016.
As part of the Museum’s Visions of Nature year in 2016, we have had the pleasure of hosting three poets in residence: John Barnie, Steven Matthews, and Kelley Swain. During the year the poets worked alongside staff in the collections and out in the Museum itself to gain inspiration for their writing. A small anthology of the resulting poetry is published at the end of 2016.
In this video John Barnie reads his poem The Grand Concourse, inspired by the Museum’s main space. Listen out for other references to the Museum in the poem. John is a poet and essayist from Abergavenny, Monmouthshire.
You can meet John on National Poetry Day on Thursday 6 October 2016, when he will be at the our special event during the morning.
This is the second in a short series of articles to accompany the Stone Age Primates temporary display at the Museum, created with the Primate Archaeology group at Oxford University. Here, Dr Tomos Proffitt, Postdoctoral Research Assistant in Primate Archaeology, shows how the use of stone tools by modern primates might connect with our earliest human ancestors.
Over the past five years I have been fortunate enough to work with and study some of the earliest known stone tools, uncovered from archaeological sites at Olduvai Gorge, one of the most famous Palaeolithic archaeological sites on our planet. Olduvai Gorge seemingly appears out of nowhere as you drive down the dirt tracks of the north western slope of the Ngorogoro caldera and national park in Northern Tanzania.
The view from the top of Naibor Soit overlooking Olduvai Gorge. Photo Credit: Tomos Proffitt
It is here that the famous Louis and Mary Leakey uncovered evidence which proved that our evolutionary origins extended not thousands, but millions of years into the past, and over the years the site has provided a wealth of animal and early human, or hominin, fossils as well as tens of thousands of examples of the stone tools they made.
Two million years ago if you were sitting where I was in Olduvai, the most noticeable feature would have been a great lake surrounded by vast floodplains, occupied by a range of herbivorous and carnivorous animals taking advantage of the abundant grass, shrubs and fresh water constantly feeding the lake. It is in this setting that you would have found small groups of our hominin ancestors (Homo habilis) standing upright and walking across the floodplains in search of food.
Lake Ndutu located at the south western end of Olduvai Gorge. Early hominins would have occupied a similar lake environment. Photo Credit: Tomos Proffitt.
As a large part of my research involved closely studying and analysing the stone tools used by the hominins who once lived in this landscape my thoughts turned to how these individuals would have used tools for the different tasks they faced.
Once this hominin group had found a partially eaten carcass, possibly that of a Deinotherium (an extinct ancestor of the modern day elephant), they would have set about trying to make the most of this valuable resource.
By using quartz flakes with extremely sharp cutting edges, made by striking a quartz block with a round hammerstone cobble, they would have been able to cut the small scraps of meat that were still attached to areas of the carcass untouched by other predators, such as lions, hyenas, wild dogs and vultures. The hominins, would, however, also have been very interested in the leg bones because they contained an incredibly nutritious food source than not many other animals could easily get to – the bone marrow.
Examples of quartz anvils used by early hominins at Olduvai Gorge. Photo Credited to Mora and de la Torre, 2005.
After butchering the animal they would have carried the meat and bones back to another group, some of whom had been collecting various nuts and roots and were now busy preparing them to be eaten. They would be cracking open the nuts and pulverising the roots on a large flat quartzite anvil using rounded hammerstones. The group that had just arrived would have used the same tools to carefully open the elephant leg bones to access the marrow inside. A whole range of dynamic food gathering, eating, sharing, learning, teaching, tool making, communicating behaviour was taking place at this location.
Fast forward 2 million years: since that original meal, the site has been repeatedly buried in sand and sediment and eroded by flowing water and the only thing that remains from this location of vibrant activity and of the lives of these hominins are a few fossilised bones and a small collection of fragmented and broken stones. This is the type of material we were excavating in 2015.
Archaeologists use a range of methods to try and understand how stone tools were used and some of the most powerful insights can be gained through observing how stone tools are used today.
Chimpanzees using both a hammerstone and anvil to crack open nuts. Photo Credit: Haslam et al, 2009.
Transport yourself now to a small forest clearing in western Africa, where a group of our closest living relatives, chimpanzees, are quietly sitting underneath a number of nut- and fruit-bearing trees. This group is taking advantage of these important food sources, and is doing so by using stone anvils and stone hammers not too dissimilar from the group of hominins at Olduvai Gorge, two million years earlier.
A hammerstone used by a capuchin, on display in the Museum
But it is possible to directly observe the chimpanzee behaviour, recording how the tools are being made and used, what waste is being produced, the learning processes going on between infant and adult, and the range of social interactions that are happening. This modern primate behaviour represents a valuable window into the types of activities that some of our earliest hominin ancestors may have also undertaken.
The Stone Age Primates exhibit at the Museum showcases these types of stone tools and how they are used by modern primates. By closely studying how our closest living primate ancestors, including chimpanzees, capuchins and macaques, make, use and discard stone tools it is becoming increasingly possible to better understand the dynamic range of early human behaviours behind similar types of hammers and anvils found at Olduvai Gorge and other East African archaeological sites.
More Than A Dodo 