Haematite vein from Eas an Fholaich, near Loch Eilt, west of Fort William

BGS Imager ID: P527666

Part of a haematite vein from Eas an Fholaich, near Loch Eilt, west of Fort William, Invernessshire. British Geological Survey Petrology Collection sample number MC 7446. 

Haematite is an iron ore mineral composed of iron oxide. It belongs to the hexagonal crystal system and can occur as stubby black rhombohedral crystals or more commonly massive, granular masses, compact, or soft and earthy. It has a dark cherry streak. There is evidence that haematite in veins has been known in Scotland from a very early date. In the middle of the 18th century haematite was mined at Tomintoul, Pennel Burn in Ayrshire and at Garleton in East Lothian. Iron ores come in many forms from bog iron ores, sedimentary bedded ores, to ore deposits injected as metalliferous intrusions. Haematite is often in the latter category.

Posted by Bob McIntosh

Mining subsidence in Ferniehill, Edinburgh, 2000

BGS Image ID: P100363

Ferniehill, Gilmerton, Edinburgh. Limestone mine subsidence event, November 9th 2000 to March 2001; 'Tumbledown Terrace'. The subsidence has caused damage to buildings, roads etc. The Carboniferous Gilmerton Limestone was quarried and mined at Ferniehill from time immemorial until about 1829. Collapsing old limestone mineworkings were responsible for what became catastrophic damage to many properties.

Download a leaflet explaining the subsidence, by Mike Bowne

BGS image ID:  P100365

BGS image ID: P100398

Posted by Bob McIntosh

William Smith, Geological section from London to Snowdon, 1819

William Smith: Geological section from London to Snowdon showing the varieties of the strata and the correct altitudes of the hills. Published: London : J. Carey, 1819.

Extract from William Smith's Geological section from London to Snowdon showing the Stonebrash Hills, the Chalk Hills and the intervening Vale of Isis and Vale of Aylesbury.

Extract from William Smith's Geological section from London to Snowdon showing the mountains of North Wales.

The section came with an accompanying 'Legend'.

Posted by Bob McIntosh

Letter from Admiralty to Geological Museum, 1917

BGS Archive Ref: GSM/DR/St/A/20

 

This letter relates to materials suitable for making compasses for aeroplanes. Such compasses would have to be reliable,  able to survive the rigours of flight and not wear out. The letter is an example of the more unusual subjects that the Geological Survey was consulted about during the First World War.

Posters relating to the Survey's contribution to the war effort 1914-1918 can be viewed here

Andrew L Morrison

 

 

 

 

Malmesbury Abbey, Wiltshire, Middle Jurassic limestone

BGS Image ID:P212039

Malmesbury Abbey, Malmesbury, Wiltshire. Looking north-east. 

Malmesbury Abbey was constructed in the 12th century of pale yellow, oolitic limestone from the Middle Jurassic limestones of the Bath area (Box Ground Stone). Only part of the Abbey now remains intact. The pale yellow oolitic limestones used in the Abbey have proved to be reasonably durable probably because the building is in a rural setting away from the problems caused by the industrial pollution of the last few centuries. A monastery was established on the site in around 676 but this building dated from the 12th century when the building was consecrated in 1180. The south portch is the most natable feature that survives from that period. At one time the abbey had a spire taller than salisbury Cathedral but it fell down some time before the Reformation when Henry VIII dissolved the monastery in 1539. Dissolution of the monastries in the 16th century lead to the stripping, sale and removal of building materials from many monastic buildings such as Malmesbury Abbey.
Date taken: 1977

BGS Image ID: P212040

One of the characteristic features of Norman ecclesiastical architecture is the high quality of the building materials selected and the outstanding workmanship of their masons. The remains of Malmsbury Abbey, now the parish church still preserve examples of this fine craftsmanship in stone. Considered to be one of the most outstanding examples of Norman decorative stone carving in Britain, this doorway in the south porch of the Abbey is carved from oolitic limestone from the Middle Jurassic, Box Ground Quarries near Bath. The limestones generically known as Bath Stones are one of the principal sources of building limestone in the United Kingdom. They were worked from numerous mines in the vicinity of the Bath which now sits upon several kilometres of old stone mine galleries. The limestones are pale to dark yellow in colour and dominantly oolitic though some shelly ragstone beds were also worked.

Posted by Bob McIntosh

PLUMBUM Galaena. Sulphure of Lead; Galena. Plate no. 24. From: Sowerby, James. 1802-1817. British Mineralogy

BGS Image ID: P704650

PLUMBUM Galaena. Sulphure of Lead; Galena. Plate no. 24. From: Sowerby, James. 1802-1817. British Mineralogy: Or Coloured figures intended to elucidate the mineralogy of Great Britain. Plate from vol: 1. page no. 55. Modern name: Galena. Location: Collected found in Derbyshire.

Posted by Bob McIntosh

Settle Lime, November 1960. The new Priest kilns.

BGS Image ID: P538126

Settle Lime, Nov 1960, north of Settle, Ingleborough, Horton and Threshfield. The new kilns. Priest kilns.

From the Hugh O'Neill collection.

Posted by Bob McIntosh

Crossing water, E.O. Teale Collection

BGS Image ID: P776556

Crossing a river by bridge,  Mbeya, Tanganyika Territory, 1928.

BGS Image ID: P776485

Crossing a river by raft

BGS Image ID: P776490

Crossing a river by precarious footbridge

BGS Image ID: P776527

Wading across a river

Photographs are from the E.O. Teale Collection. 

Also see :

Crossing a river - E.O. Teale Collection

River transport by traditional 'dugout' canoe. Gold Coast. 1919

Posted by Bob McIntosh

Land Rover photographs in the BGS archives

A set of photographs for Land Rover fans!

BGS Image ID: P539250

Track conversion close-up. 4 independent tracks, the front two being steered through the normal steering system. The cost of the kit was £650.

BGS ImageID:  P539249

Land Rover demonstation, Solihull. Bristol Type 192 Belvedere helicopter carrying a Land Rover.

BGS Image ID: P539252

Land Rover demonstation, Solihull. Large wheel conversion.

BGS Image ID: P539253

Land Rover demonstation, Solihull. Rail conversion. Road wheels have been replaced by Duthene-treated tyres, this gives very good traction. One vehicle pulled 52 tons of wagons.

BGS Image ID: P539860

Plant demonstration Soil Fertility Limited. Crop spraying Land Rover with hovercraft assist.

BGS Image ID: P539861

Plant demonstration Soil Fertility Limited. Crop spraying Land Rover with hovercraft assist.

Photographs from the Mr. Hugh O'Neill Collection. Most of the photographs in this collection are of quarries in the UK. Dates are c. 1961.

Posted by Bob McIntosh

Groundwater drilling in Scotland

BGS Image ID: P001426

Hardthorn Road site, Dumfries, Dumfries and Galloway Region. Water strike during drilling for groundwater at Hardthorn Road. 

The rotary drilling rig encountered only dry Permian breccia to 56 m. depth. At this level, a water-bearing fissure suddenly produced a surge of water at the surface. Other fissures were encountered at intervals to 130 m. depth. The final yield of water from the borehole was over 35 litres per second. The borehole is to be used by West of Scotland Water as part of the Dumfries public supply system. The Silurian hills can be seen in the background. These encircle the Permian aquifer in the floor of the basin.

BGS Image ID: P001434

 Adjacent to the A70 road near Tarbrax, Strathclyde Region. A V-notch tank in use during a pumping test on an exploratory groundwater borehole. 

The borehole was drilled by West of Scotland Water as an exercise to see whether groundwater could be used to supply the village of Tarbrax, and replace an unreliable surface stream source. The borehole, drilled into Upper Devonian sandstone and mudstone, yielded over 7 litres/second. The V-notch tank is used to measure the water flow, by comparing the height of water flowing over the V with flow rates in a reference table. The drill rig in the background was used to drill the borehole and install the electric pump to 50 m. depth.

BGS Image ID: P001440

Bridge Farm borehole, Machrie, Arran. An artesian, flowing, borehole drilled into the Permian sandstone aquifer at Machrie, Arran. A T.V. log of the borehole is being undertaken, using a BGS Land Rover.

The flow of water was measured at 10 litres/second, which makes it one of the highest naturally-flowing boreholes in Scotland. Most of the water is coming into the borehole at depths between 65 m. and 95 m. below ground level. The quality of the water is very high, and it is hoped that West of Scotland Water will use this source for most of the island's water supply before 2002.

BGS Image ID: P001441

Bridge Farm borehole, Machrie, Arran. Drilling a groundwater production borehole for West of Scotland Water at Machrie, Arran.

The drill rig is located close to the 'String' road from Brodick at a site chosen by the Hydrogeology Group of BGS. The rig is using an air flush hammer to drill through Permian sandstone. The compressor is seen at the left. Compressed air is sent down the drill rods to the hammer at the bottom of the borehole. The air operates the hammer and brings cuttings and water to the surface. The water flows away from the site to a stream. The 4-wheel drive tractor unit powers the rig and is highly maneuverable - useful for sites with problematical access.

Photographs by Derek Ball

Posted: Bob McIntosh