Geological Society of Norfolk
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geolsocnorfolk.bsky.social
Geological Society of Norfolk
@geolsocnorfolk.bsky.social
33 followers 33 following 27 posts
Understanding and discovering the geology of East Anglia and Norfolk in particular.
See http://www.norfolkgeology.co.uk/.
Posts Replies Media Videos
geolsocnorfolk.bsky.social
Find out more about Planet Earth.
Our Autumn/Winter lecture programme is ready:

* Thu 20th Nov. 'Descent into Snowball Earth: a unique record on the Garvellach islands, SW Scotland' by Elias Rugen (UCL).

Further details at www.norfolkgeology.co.uk/lectures.htm
An image of the Earth as it might have looked over 0.7 billion years ago when ice sheets are thought to have extended to equatorial areas. Image courtesy https://terraforming.fandom.com/wiki/Snowball_Earth.
October 27, 2025 at 2:29 PM
geolsocnorfolk.bsky.social
We have spectacular ploughsoil geology in East Anglia, great diversity of erratic stones in river deposits & glacial till.

* Carb & Trias plant, Jur reptile, Cret echinoid fossils. * Scots porphyry & Northum dolerite.
* Dartmoor breccia.

Fieldwalking here has a fascinating geological dimension.
The battered form of an Inoceramus fossil bivalve shell in flint, of Upper Cretaceous age. A ploughsoil find from Norfolk, UK.
September 6, 2025 at 9:20 AM
geolsocnorfolk.bsky.social
Rhinos are extraordinary Pleistocene survivors - natives of the Britain in both warm & cold phases. 🦏
Here's a recent find (molar, lower jaw) from Norfolk river gravels which GSN members are researching. Could be Coelodonta antiquitatis (cold) or Stephanorhinus hemitoechus (warm). 🌍🗻🪨
Side view of a rhinoceros molar tooth (lower jaw) in a good state of preservation. It is stained dark presumably by burial in organic-rich sediment. It shows three long roots and three projecting cusps bridged across the back. Occlusal view of a rhinoceros molar tooth in a good state of preservation. It is stained dark presumably by burial in organic-rich sediment. It shows three loops of enamel forming cusps.
September 5, 2025 at 7:41 PM
geolsocnorfolk.bsky.social
RIP Dr Sylvia Peglar - pioneering investigator of the fossil pollen stratified in Diss Mere, Norfolk - a backdrop to so much inspiring, recent palaeo-environmental work by @royalholloway.bsky.social @amywalsh.bsky.social
A summer view over Diss Mere, Norfolk UK. The lake has an unruffled surface and the view is framed by trees.
August 26, 2025 at 8:06 PM
geolsocnorfolk.bsky.social
'Rethinking the origins of plate tectonics' - Naomi Oreskes explores how our understanding of the planet has been shaped by money. An online lecture @ri-science.bsky.social on Monday 12th May - www.rigb.org/whats-on/ret...
A view of the rift zone of the mid-Atlantic ridge outcropping in Iceland. There is a rocky ravine in the foreground marking the rift and an attractive landscape of firths and islands in the background.
May 2, 2025 at 9:26 AM
geolsocnorfolk.bsky.social
'Macaque molar from the Red Crag Formation, Waldringfield, England' - investigating a late Miocene or Pliocene specimen in the @sedgwickmuseum.bsky.social collection.
Open Access at hal.science/hal-04460190.... #Suffolk #geology #palaeontology 🌏⚒️
An engraving of a macaque monkey (Barbary Ape, Macaca sylvanus) from 'Mammalia' by JG Wood (London, 1865). Photographs of different aspect of a molar tooth of Macaca sp. found c.1908 in the Red Crag Formation of Waldringfield, Suffolk, in the collection of the Sedgwick Museum of Earth Sciences, Cambridge.
April 22, 2025 at 5:59 PM
geolsocnorfolk.bsky.social
'Prehistoric Beasts: Land, Sea, Sky' exhibition at Bury St Edmunds, Suffolk, UK using real and cast specimens @sedgwickmuseum.bsky.social and artwork by Alex Pritchard.
Booking and further info at www.moyseshall.org/whats-on/det...
'Prehistoric Beasts' exhibition logo by Alex Pritchard showing a carnivorous dinosaur skull.
April 22, 2025 at 5:24 PM
geolsocnorfolk.bsky.social
'The Cretaceous world: plate tectonics, palaeogeography and palaeoclimate' - an excellent introduction to the #Cretaceous - a world 10°C warmer; sea levels 70 m higher - and its continental geographies. Download at www.lyellcollection.org/doi/pdf/10.1... thanks @geolsoc.bsky.social 🌏⚒️ #geology
Colourful Cretaceous strata in Hunstanton Cliffs, Norfolk, UK: brown Carstone sandstone; Red Chalk; Grey Chalk, a sequence spanning 110 to 95 million years BP. A pale blue lagoon in a chalk quarry in Norfolk, UK, showing white blocks of chalk in the foreground. An artists' impression of a late Cretaceous seabed, as displayed at Saffron Walden Museum, Essex, UK. Sharks, ammonites, sponges, belemnites and echinoids can be seen; also burrows in the sediment.
April 16, 2025 at 10:04 AM
geolsocnorfolk.bsky.social
The Palaeontological Association is drafting up ideas for 'UK County Fossils'.
How about the Cromer Forest-bed mammoth Mammuthus trogontherii for Norfolk and the Coralline Crag bryozoan Meandropora aurantium for Suffolk?
Any better suggestions?
@thepalass.bsky.social l #fossils #Norfolk #Suffolk
The colourful logo of the 'UK County Fossils' initiative of the Palaeontological Association, 2025. An artist's impression of the 'West Runton Mammoth' Mammuthus trogontherii, whose skeleton was found at West Runton, Norfolk in 1990. A bun-shaped specimen of the bryozoan Meandropora aurantium from the Coralline Crag of Sutton, Suffolk.
April 8, 2025 at 8:42 PM
geolsocnorfolk.bsky.social
Our next lecture "Whatever happened to continental drift?" by Dr Roy Livermore (10th April, 19:30 at UEA, Norwich).
See www.norfolkgeology.co.uk/lectures.htm.
"We examine some of the exciting and often surprising developments that have revealed the three great heat engines that drive our planet".
Alfred Wegener's diagram showing supposed disposition of the continents in the early Pleistocene (from 'Die Entstehung der Kontinente und Ozeane', 1929, via Wikimedia Commons). It shows the continents roughly in their modern positions. Alfred Wegener's diagram showing supposed disposition of the continents in the Eocene (from 'Die Entstehung der Kontinente und Ozeane', 1929, via Wikimedia Commons). It shows how Africa and South America fitted together before the opening of the Atlantic Ocean. Alfred Wegener's diagram showing supposed disposition of the continents in the Late Carboniferous (from 'Die Entstehung der Kontinente und Ozeane', 1929, via Wikimedia Commons). They are all grouped together as Pangaea.
March 26, 2025 at 3:06 PM
geolsocnorfolk.bsky.social
'A unique, far-travelled graptolite-bearing erratic pebble from the Lowestoft Till (Quaternary: Anglian Stage) of North Lopham, Norfolk'-
www.lyellcollection.org/doi/full/10....
Such a rarity, it deserves a paper all to itself!
#Pleistocene #geology #Norfolk #UK #Germany
A rounded, black Silurian chert pebble showing a Monograptus priodon graptolite fossil. It has been sawn at one end to remove a thin section for analysis. Close-up view of a uniserial graptolite rhabdosome of Monograptus priodon. An arable field at North Lopham, Norfolk, UK, showing the findspot of the graptolitic pebble (circled in red).
March 23, 2025 at 8:55 PM
geolsocnorfolk.bsky.social
Jurassic septarian nodules often turn up as glacial erratics in East Anglian ploughsoil.
Sliced and marinated in UV light they turn into a colourful visual feast.
#Geology
Three slices of an Upper Jurassic septarian nodule under artificial light. A slice of Upper Jurassic septarian nodule under fluorescent light showing crystalline calcite as complexions of blue, green and yellow, and the mudstone as dark grey-brown. A slice of Upper Jurassic septarian nodule under fluorescent light showing an 'island' of pale brown material surrounded by a blue, green and yellow 'sea' of crystalline calcite. A close-up of a slice of Upper Jurassic septarian nodule under fluorescent light showing interesting crystal textures.
March 23, 2025 at 8:47 PM
geolsocnorfolk.bsky.social
'Scientific Dating of Pleistocene Sites: Guidelines for Best Practice' - historicengland.org.uk/images-books...
A new publication @HistoricEngland including details of Happisburgh, Lynford and Marine Area 240 off Great Yarmouth.
#Pleistocene #Norfolk #Palaeolithic #Geology #Archaeology
A scientist from the British Museum's AHOB project excavating three woolly mammoth tusks at Lynford Hall Pit, Norfolk, UK. Image courtesy Nigel Larkin.
March 23, 2025 at 8:34 PM
geolsocnorfolk.bsky.social
'Restoring Ghost Pingos' - a new advisory booklet published by the Norfolk Wildlife Trust & Norfolk Ponds Project about how to realise the biodiversity potential of backfilled periglacial ponds - www.norfolkwildlifetrust.org.uk/LostPonds
@carlsayer.bsky.social
The cover of 'Restoring Ghost Pingos' - a new advisory booklet published by the Norfolk Wildlife Trust, 2025.
March 23, 2025 at 8:26 PM