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Darren

* Our Dear friend Dean Lomax hits the headlines. *

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BBC News: Forgotten fossil found to be new species of ichthyosaur‏.

Our Dear friend Dean Lomax hits the headlines.

Palaeontologist Dean Lomax explains how what had been believed to be a plaster cast turned out to be a new species of ancient marine reptile. A fossil stored in a Doncaster museum for 30 years and thought to be a plaster copy has turned out to be a new species of ancient reptile. A young palaeontologist working with the University of Manchester found the fossil in 2008, in the collections of Doncaster Museum and Art Gallery. He realised it was the 189-million-year-old remains of an ichthyosaur – an extinct marine reptile. Further study confirmed it to be a previously unknown species. The finding has now been published in the Journal of Vertebrate Palaeontology.

 

Dean Lomax, the 25-year-old palaeontologist who studied the specimen, said it was so well preserved he could determine the contents of its stomach.

“We could see tiny hook-shaped features that were actually the hooks from the tentacles of squid,” he said. “So we know what its last meal was.”

Mr Lomax worked with Prof Judy Massare, from the State University of New York, comparing the specimen’s fossilised bones with those of almost 1,000 other ichthyosaurs in museums in the US and Europe. Mr Lomax explained that subtle anatomical features in its fin bones set the species apart from others.

Jurassic find

It is not uncommon to find ichthyosaur fossils in England. The sharp-toothed marine reptiles swam in large numbers in the seas around Britain when the dinosaurs roamed. This particular specimen was found in the rocks of Dorset’s Jurassic Coast in the early 1980s and brought to the museum, so it is not clear how it was eventually mistaken for a copied Silvia Danise from Plymouth University said its “rediscovery” was a “striking example of how important museum collections are for scientific research”.

“Collections are treasures that show their value each time we’re able to look at them with a different perspective, and by asking new scientific questions,” she told BBC News.

Dr Blanca Huertas, from the Natural History Museum in London, pointed out that there were still many species to discover in museum collections.

“Sometimes we discover things in the field,” she said, “but the collections are an incredible source of opportunities, since visiting them, people can study specimens and collections from hundreds of places across the entire planet and travel in time.”

Ichthyosaurs

Often misidentified as “swimming dinosaurs”, they first appeared in the early Triassic period (251 million to 199 million years ago) the name means fish-lizard, although the creature has been classified as a reptile since the mid-19th Century. Its length ranged from 1m to 14m – although the average length was 2m to 3m (the Doncaster fossil is 1.5m) the creature was noted for its sharp, robust teeth. Ichthyosaurs became extinct before the dinosaurs, dying out in the early part of the late Cretaceous period (145.5 million to 65.5 million years ago)

Source: Encyclopaedia of Palaeontology.

This new species has now been named Ichthyosaurus anningae – in honour of Mary Anning, the British fossil-hunter who discovered the first ichthyosaur on the Dorset coast in about 1811.

The hope now is that news about the significance of this ancient specimen might help track down the fossil hunter who found it.

Dr Stephen Brusatte, a palaeontologist from the University of Edinburgh added that there was “a whole lot more still to find out there”.

He told BBC News: “Palaeontology is a unique science because you don’t need an advanced degree or specialised training to find a fossil, just patience and a keen set of eyes.”

Mary Anning

The new species has been named after 19th Century palaeontologist Mary Anning.

 

Fantastic Fossils And Dastardly Dinosaurs

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Hi everyone,

At the Stamford library February the 19th 2015 2.00pm to 4.30pm was a very busy time for the members of the Stamford and District Geological Society. Being as it is half -term holidays for the children we found ourselves inundated with lots of families pouring through the doors of this historic building. To join us for an afternoon of prehistoric fun, quizzes and craft activities.

It was a wet and windy day with most of those looking a bit bedraggled. That certainly didn’t deter the children form dragging mums and dads along to show off their fossils that they had collected from all around the country.

Some of the fossils where brought along just to show other enthusiasts but also a lot of them where brought along for our team to give it our best shot to try and identify them or at least guide them in the right direction.

Due to popular demand the question asked many times from the parents was “where can we take our children to go fossiling “. So we struck upon an idea and are now going to organise this summer a family oriented field trip to a local nature reserve which has spoil piles of Oxford Clay full of Belemnites and Gryphaea.

My son Elliot was extremely helpful in helping to i.d. some of the Oxford Clay fauna that was bought in. He also took along with him two ammonites from his collection to show on the display table.

I took 50 membership leaflets to join the Stamford and District Geological Society they were all gone by the end of the day. So hopefully fingers crossed we may see some new members joining us this year.

Here are a few photos of the event.

display table 1

display table 2

free fossils 1

And a few photos of the many fossils brought in.

fossils bought in for i.d. 3

fossils bought in for i.d. 4

fossils bought in for i.d.6

It was just a few hours with fossils and a lot of smiling faces…..perfect.

Regards,

Darren.

The Tertiary igneous province of N.W. Scotland ( review )

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Thank you to those and DR Ian Sutton who ventured out again on another chilli night to participate in our final winter talk of the year.

Topics regarding Geology always leave me google eyed but the facts, with humour, coupled with the scenarios that Ian created made this evening thoroughly enjoyable.

It was a real treat as Ian took us though his slideshow to view phots of members past and present on one of his many geological trails.

To hear about Alan Dawn constructing a makeshift stretcher to collect ammonites and belemnites and to commandeer two members to carry it for him brought a smile to all those involved.

And would you have guessed (I certainly didn’t) that curling stones come from the “Ailsa Craig”.

Ailsa Craig

scottish curling team

I hope Ian can visit Tinwell Village hall again next year….those glacial and landslide photos would be great to see again.

Regards,

Darren.

The Stamford Stone Trail written by Alan Dawn

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This leaflet The Stamford Stone Trail has been bought to my attention by one of the Stamford and District Geological Society’s members. I thought you would like to see it , so have put it on the website here for you to read..

p.s. Thank you David.B

Regards,

Darren.

*It was another fine evening at the SDGS Tinwell Winter Talk*….with some mysterious stones to ponder over..!

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The Mysterious Stone :

rock found farmers field (3)

rock found farmers field (2)

rock found farmers field (1)

Firstly I’d Just like to say thank you to Dr Stephen Parry for talking to the SDGS. And to all those who attended our Winter Talk for December. It was another great turn out which was very pleasing to see considering the rather chilli winter evening conditions. For me personally id never realised the importance of this topic. And I would thoroughly recommend you access this link STRATEGIC STONE STUDY for more information.

The bite sized nibbles to eat upon arrival with tea and coffee to drink where welcome treats also.

And i would also like to thank Andrew who bought in what he thought might have been a Meteorite ( pictured above ) and was wandering if anyone present at the talk might have been able to shed some light on one of three of his mysterious stones. Which were found just outside Saffron Waldron in a farmer’s field?

Fortunately I have friend who is an avid collector of Meteorites with many years of experience. I took some photos of Andrews’s stone and sent them with as much information as Andrew could give me on his behalf and with consent. If you’d like to read below this is the response I received and have forwarded the information onto Andrew as requested.

“Two things are for sure. One… it doesn’t have any features (at all) that would indicate it to be meteoritic, and two… it didn’t originally come from anywhere near Essex.

it’s almost certainly part of the Essex post-glacial drift geology and I would suspect it came out of the boulder clay. That’s going to make it tough to identify from the appearance and described properties so far, since the drift geology has rocks that have come from as far away as Scotland and Scandanavia. There are also a great many rocks that have come from North Wales, since the Thames is believed to have been a huge river at one time that originally drained the Welsh Mountains before its headwaters were captured by the Severn River.

There are basalts, quartzites, and sarsens (a type of silicified sandstone) plus all kinds of other erratic’s – including a wide variety of igneous rocks. If the colour rendition in the pictures is accurate then it’s too dark to be a sarsen (they get to pale green but not beyond), and I would assume its rich in chlorite or olivine and of igneous origin. All of the likely candidates will be dense rocks. From the way it has broken it looks like it might be somewhat foliated and there doesn’t seem to be much difference in weathering colour between the broken and unbroken surfaces. On that basis, I would guess it to be a chlorite-rich schist of some kind. Chlorite is a relatively soft mineral, but the rock types it occurs in will not necessarily also be soft.

Although you describe it as weakly magnetised (as opposed to magnetic), that doesn’t narrow it down too much. That will likely be from a secondary mineral, and the only two common possibilities are pyrrhotite and some types of magnetite (the varieties known as lodestone). Either of those might be present in igneous rocks that have green mineralogy. Since pyrrhotite (the mineral itself) is generally only weakly magnetised, there would need to be a lot of it present in the matrix to influence the properties of the rock itself… so I would assume a small amount of secondary magnetite is present. “

Hope to see you at our next Winter Talk:

“BUILDING A HISTORY OF THE GLORY DAYS OF LONDON BRICK”

Regards,

Darren.

* Quarry Personal Protective Equipment regulations for Next Years Field Trips *

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When entering working quarries and due to new strict guide lines regarding PPE (Personal Protective Equipment). Field trip organisers will advise to all members attending the field trip beforehand on appropriate clothing and footwear for the locality, time of year and as recommended Orange Hi-Vis Vests.

Failure by participants to wear recommended clothing and equipment may lead to their exclusion from the meeting. The Stamford and District Geological Society does not automatically provide personal protective equipment.

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