Gibeon Iron Meteorite. 132mm long and 2.8 kilos in weight and an iron-nickel alloy. From the famous Gibeon impact site in Namibia, West Africa.
Another view…A number of huge pieces from the same meteor are on show in Windhoek, capital of Namibia. Many thanks to C.D. for allowing me to photograph this piece.
Southbank Foreshore walk with John Wong + some hardy AGS members 2nd March 2017
Foreshore and St.Pauls + Millennium Bridge.
Not sure what we will find but one never knows……
Looks like flint, bricks, debris, chalk, limestone, granite, pebbles, sand….
This is the group that braved the cold and had a great day.
This is Diana’s best find. A piece of Acropora coral, very nice!
These are some of the other finds: animal teeth; animal bones; a marine shackle; c17th clay pipe bowl +stems (lots); chalk, boat nail, coal with fossilised wood; flint burrow cast; shells; pottery; glass; an acorn cupule or cap.
Clay pipe items found on the foreshore and how the pipes would have looked. Thank you to John Cook for the photo. This is just a small amount of the interesting artefacts and even fossils that were found. Flint from being used as ballast in the past, as well as an old building material. Chalk from the ‘barge beds’ that were laid down on the shore for the flat bottomed barges to settle on when the tide was out. Large amounts of animal bones from restaurants and suchlike alongside the river in the past. Countless pipe stems and bowls from smokers past. A small bowl from the days when tobacco was much more expensive, larger bowls from more recently. Countless pieces of pottery, plain, decorated, glazed. Numerous pieces of iron work and steel from old boats broken up on the Thames shore. Coal from the loading wharfs that were scattered along the Thames. Lots of sand that had been deposited onto the shore for the 1951 Festival of Britain. Oyster shells, remains from an old fashioned meal. Tons of brickwork and stones from the Blitz and old wharfs and buildings that have gone to the Thames…..and a suspected Septarian Nodule or Concretion.
More photographs of the remaining part of the day……
Two sandstone paving slabs on Blackfriars Bridge, showing Liesegang rings.
Waterloo or ‘Ladies’ Bridge. Large structural pillar built of Calcarenite current bedded Portland limestone with numerous oyster shell fragments and ….
…reef building algae Solenopora portlandica showing growth rings. Sometimes said to resemble cauliflower florets.
Flooring in the Southbank Centre. Carboniferous Derbydene crinoidal limestone. Too nice to walk on….
Styolites have dissolved away an area of the crinoid fossils.
Bronze statue of Mandela mounted on a medium grained Gabbro plinth, 2 billion years old known as ‘Belfast Black’ from Mpumalanga S.A.
-near Victoria Embankment Gardens.
All Saints Church Fulham. The original 96ft. tower built of Kentish Ragstone around 1440.
Age and pollution taking its toll on the Cretaceous limestone.
Fulham Palace with diaper brickwork.
John C. looking very comfortable in the ‘Bishops Tree’- Fulham Palace.
Sculptured and polished pavement rock at Millbank, SW1
Large carved Gypsum Alabaster figures – Jacob and the Angel. Tate Britain, Millbank. Jacob Epstein 1940-1.
Close-up: Angel supporting Jacob who has just collapsed…..
CRYSTAL PALACE DINOSAURS
Plesiosaurus + Ichthyosaurus – Jurassic
Teleosaurus – Triassic to Cretaceous
Teleosaurus + Plesiosaurus + intruders
Megalosaurus – Jurassic
Iguanodon, with nose spike – Cretaceous
Iguanodon close up
Section of ‘Geological Strata’ with simulated Carboniferous Limestone + Sandstone + Ironstone bands with faults and coal seam. Photos RF
AGS Field Trip led by John Wong to Bardon Hill Quarry, Leicestershire.
29th October 2016
This was the view down into the quarry. Fortunately a mini bus was available……..
Then the mist rolled in……but cleared almost immediately.
Dacite on the way down………
Andesite Breccia showing water-laid sedimentary structures. The steps or ‘Benches’ surrounding the quarry can clearly be seen.
Drilling machine for explosive charges.
Giant geological bucket for samples…….figure in background for comparison.
Quartz vein in the form of a boudinage structure in andesitic volcanoclastic sediment.
Light grey, fine-grained, graded and laminated marine sediment.
In the upper background, Triassic Mercia Mudstone deposits fill a paleo-valley, which is a Triassic unconformity on Precambrian Bradgate Formation volcanoclastic rock.
A fantastic day at an end…….. Some samples from the quarry:
Pictures by RF
Thank you AGS member Penny Badham for sharing some of her collection below:
Serpentine Chameleon – carved by Emmy Frester c.1960.
Flint nodule-Collected 1971 in Potters Bar garden. 1065grms. Polished by Frank Stokes.
Nummulites from Oman. Collected from building aggregate – 2009.
Polished examples of: 666-Gneiss 876-Clastic Rock 1076-Rhyolite 403-Breccia 498-Schist 661-Serpentine 694-Phyllite 692-Porphoritic Rock 1661-Olivine Gabbro – by Frank Stokes.
Chess Set – Gypsum, Serpentine and Mudstone. Carved + polished by Frank Stokes.
Pictures by R.F.
Three fantastic AGS field trips pictured below, make sure you go on the next one!
Mike’s ‘Bucks Geology and Churches trip # 2’
Casts and moulds of bivalves in Portland Stone in Dinton Church, Bucks. (Mike Howgate)
Dragons and the Tympanum of Dinton Church. (Mike Howgate)
Watling Street Part 7 with John Wong
Red sand ‘road’ into Aspley Heath
Some of the 13 adventurer’s heading off to the woods….
Brown sand & Ironstone ‘Pavement’
‘Road’ cutting with exposures
John’s trowel with examples
Ironstone with fossilised wood.
Ironstone external mould of possible Pholadomya.
Danesborough iron age Hill Fort. Extensive remains of rampart and ditch defences. Wavendon Woods.
Beech and pine trees
St. Mary Magdalene, Little Brickhill Church. (John Wong)
Part of the Church wall. Ironstone+clay tiles+Totternhoe Stone. (John Wong)
Great Tew Quarry, Oxfordshire with John Wong and all. Picture taken by Paul, our guide & quarry manager.
Giant Ironstone blocks, 5 – 10 tons each for building work.
Waiting to be cut out.
Almost falling out of the hill side.
St. Michael & All Angels Church, Great Tew, Oxfordshire. Ironstone built, c1400 A.D.
Ammonites from the quarry.
Crystals of Gypsum from the clay.
Details of the Ammonites.
Ironstone pieces & Clay from the quarry.
Rhynchonellid Brachiopod found by John Wong
180my Ironstone Nautilus (11 kilos) with its smaller modern relation-Found by workmen in the Gt. Tew quarry.
Another view showing sutures.
Swallow Holes at Water End, Hertfordshire (an SSSI) – GA Field Trip July 2016 with Mike Howgate. (he with the stick…..)
Potterells Stream ‘overflow channel’……..
……………disappearing into the underlying chalk to eventually join the river Colne.
A ‘Swallow Hole’ of Mimmshall Brook near North Mimms, just one of several in the area. These drain underground and eventually join the River Lea.
Thank you Sue Jacobs for the info and photos and two more below…
Lowestoft Ness, the most Easterly point in Britain. The sea defence blocks include gneiss + larvikite from Norway.
Reigate Lower Greensand ‘Caves’ where the white sand was extracted for glass manufacture in 19th c. Man-made self supporting tunnels due to the unusual quartz grains locking together and being strong in compression. If you want to visit, see ‘Links’ for the website.
Other interesting geological bits below……………
Phenocrysts of Feldspar in Granite + two close-ups
Thank you to Julia & Doug Daniels for the photos of some of their minerals, below.
Small Smoky Quartz
Morion- type of smoky Quartz
Beautiful Carved Quartz Rose
Chalcedony – type of Quartz
Mike Howgate’s well attended field trip to Stonesfield, Oxfordshire, 2015.
The way down! Into the abyss. A ‘slate’ mine shaft which the bravest descended.
Not a very inviting entrance at the bottom of the shaft. But fascinating.
The Boss was there!
Health and safety headwear
This is why the village is called ‘Stonesfield’
An exposure of the limestone.
The ‘Slate’ mine owner also provided refreshments……
Followed by a visit to Churchill, Oxfordshire
The Stonesfield photos supplied by Mike Howgate and Richard Furminger.
Some heavily disguised members of the AGS on a Field Trip to Dunstable in November 2014. They were looking for the source of the River Ver and only John Wong knew where it was…..
Was this it?
Thank you Sue Jacobs for the information and photographs.
Janice Nicholson sent me the three photographs below –
An interesting (oolitic) limestone tracery window in a Church in Essex with Anglo Saxon connections. Janice wondered what Winston Churchill was doing up there on the wall?
A very weather worn carved head of King ?
A sandstone Victorian viaduct in Scotland.
Seed Fern. Natural History Museum (behind glass).
From ‘Advanced Text-Book of Geology’ by David Page. 1876. W.Blackwood&Sons. Original price 9d.
2.5cm. Twinned Crystal of Fluorite. Hilton mine, Scordale, Cumbria.
Corals-Lithostrotion. Yorkdale series. Carboniferous. Nappa, Yorkshire.
A jumble of ‘Tuning Fork’ Graptolites. Didymograptus murchisoni. Ordovician. S.Wales.
Turtle Coprolites in Limonite. Oligocene 30-35my. Washington State, USA.
Calcified Promicroceras Ammonites. Black Ven Marl, Charmouth, Dorset. Lower Jurassic. Photographed with kind permission Mr.Paddy Howe of The Fossil Workshop, Lyme Regis.
Polished Clinochlore crystals. Ural Mountains, Russia.
Blue John semiprecious stone. Fluorite. Treat Cliff Cavern, Castletown, Derbyshire.
Belemnite – 18cm x 1.8cm. dia. Stewartby Brickworks, Bedfordshire. Photographed by kind permission of the finder, Olwen Jones.
Blue Cavansite Cystals with white Stilbite on a volcanic rock groundmass. Pune, India.
Hematite – Botryoidal (blobby) form. Morocco, North Africa.
Crustacean Burrow in Chalk – Hunstanton Norfolk.
Belemnite Battlefield – Lower Jurassic Malmstone, Edge Hill, Banbury, Warwickshire.
Crinoid Scyphocrinites elegans – calyx detail. Morocco.
Gran Canaria ‘Ice-cream’ Tuff Layers. The green colourisation caused by Chlorite and Hematite is responsible for the pink.
Ammonite Harpoceras sp. – Upper Lias, Dorset.
Small Essex Man. Flint Pseudo Fossil – Epping Forest.
Crystal Palace Dinosaur Park. Iguanodon with Nose Spike.
Stromatolite – Cyanobacteria Growth.
Dover Cliffs Erosion.
Fossil Coral Wall – Bristol.
Pink Aplite Vein in Granite – Jersey C.I.
Ripple marks in Sandstone.
Conglomerate – Jersey C.I.
Pumice – South Wales Coast. Origin?
Barite (Baryte) Crystals.
Cockscomb Baryte – Somerset
Quartz Crystals – Minas Gerais, Brazil.
Himalayas – Gigantic Tectonic Plate Movement.
Mr. William (Strata) Smith’s Museum, Scarborough.
Tigers Eye – type of Quartz. Polished to show off its remarkable optical quality called ‘Chatoyancy’.
Malachite – Copper Carbonate Hydroxide mineral. From D.R. Congo, Central Africa.
Diplomystus dentatus – Fossilised predatory fish. Green River Formation, USA. Eocene.
Pictures by R.F. unless otherwise credited.
Aerial photographs of Himalayas by kind permission L. Rybin.
Barringer Meteor Crater in Arizona – photographer unknown.