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February 2010 – Evaporites
Iron carbonate (FeCO3), or siderite from the Greek sideros meaning iron, is a major source of ore for steel-making being usually low in sulphur and phosphorous, and high in manganese and/or magnesium. This mineral is...
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Category Archives: Jurassic

January 2010 – Siderite

Iron carbonate (FeCO3), or siderite from the Greek sideros meaning iron, is a major source of ore for steel-making being usually low in sulphur and phosphorous, and high in manganese and/or magnesium. This mineral is able to assume almost any colour but commonly brown, yellowish-brown, or grey specimens can be found. It occurs in Britain’s [...]
By admin on January 6, 2010 | Leave a comment

June – Alum Shale

Alum Shale occurs within the upper 35 metres or so of the Whitby Mudstone Formation. A suite of rocks that originated as soft sediment accumulating on the floor of an ancient sea (the Tethys) which occupied this area between c.188 million and c.182 million years ago during the late Lower Jurassic phase of Earth’s geological [...]
By admin on June 1, 2009 | Leave a comment

March – Ironstone

Iron makes up a full 35% of the whole Earth, though most is sequestered within the metallic core, with the crust containing around 6%. It is an important rock commercially, being smelted to make iron and steel. High grade deposits, often comprising more than 70% iron, were laid down in the Precambrian, around 2 billion [...]
By admin on March 8, 2009 | Leave a comment

November – Ammonite

Ammonites are coiled relatives of the octopus (Cephalopods) and became extinct at the end of the Cretaceous Period around 65 million years ago. Below is an image of a Harpoceras, which lived during the Jurassic Period. These fossils can be found in the Upper Liassic shale (Whitby Mudstone Formation) which crops-out widely across Cleveland and the [...]
By admin on November 1, 2008 | Leave a comment

Slapewath

Contents Site Description Site Map Site Assessment Surveyors Grid Reference NZ 643 158 BGS Sheet 34 OS Sheet 94 Forwarded as RIGS 30/09/2003 Site Description Site Status Description of Geodiversity Exposures of Cleveland ironstone formation revealed in various river-cliffs and a waterfall in a fluvial environment Literature References The Floating Egg – Roger Osbourne 1998 Site Map Site Assessment Access and Safety Comments Rating Safety of access Down track parallel to bridge 6 Safety of [...]
By admin on September 24, 2003 | Leave a comment

Woodhill Gill

Contents Site Description Site Map Site Assessment Surveyors Grid Reference NZ 655 132 BGS Sheet 34 OS Sheet 94 Forwarded as RIGS Site Description Site Status SNCI Description of Geodiversity Upland stream-side escarpment revealing deltaic sandstones specifically the Moor Grit member of the Scalby formation Literature References Site Map Site Assessment Access and Safety Comments Rating Safety of access Along designated footpath 10 Safety of exposure Steep slopes obscured by vegetation 5 Restricting conditions Vegetation growth in summer [...]
By admin on September 20, 2003 | Leave a comment

Cass Rock Quarry

Contents Site Description Site Map Summary Evaluation of Site’s Value and Importance Surveyors Grid Reference NZ 631 146 BGS Sheet 34 OS Sheet 94 Forwarded as RIGS Part of Guisborough Forest 30/09/2003 Site Description Site Status SNCI Brief Site Description Site 7 of 7. Disused alum quarry revealing exposures of Liassic Whitby mudstone and overlying Middle Jurassic Saltwick sandstone. Following abandonment after alum working, this quarry [...]
By admin on September 20, 2003 | Leave a comment

Cow Bar Nab

Contents Site Description Site Map Site Assessment Surveyors Grid Reference NZ 7784 192 BGS Sheet 34 OS Sheet 94 Forwarded as RIGS Part of Skinningrove to Staithes Coast 30/09/2003 Site Description Site Status Part of the Heritage Coast Description of Geodiversity Costal cliff nab exposure consisting of the Staithes sandstone formation which is the type locality. The foreshore to the west of the coastal defences consists [...]
By admin on September 8, 2003 | Leave a comment

Easington Beck

Contents Site Description Site Map Site Assessment Surveyors Grid Reference NZ 749 162 BGS Sheet 34 OS Sheet 94 Forwarded as RIGS 30/09/2003 Site Description Site Status SNCI Description of Geodiversity Upland river cutting through deltaic sandstone revealing river-cliffs and waterfalls. Exposures include Saltwick sandstone, Dogger and Whitby mudstone formations Literature References Site Map Site Assessment Access and Safety Comments Rating Safety of access From footbridge and along stream bank 8 Safety of exposure Slippery on [...]
By admin on September 4, 2003 | Leave a comment

Wiley Cat Beck

Contents Site Description Site Map Site Assessment Surveyors Grid Reference NZ 643 145 BGS Sheet 34 OS Sheet 94 Forwarded as RIGS 30/09/03 Site Description Site Status SNCI Description of Geodiversity Upland river gorge revealing exposures of Saltwick sandstone with a beck cutting steeply through the profile Literature References Site Map Site Assessment Access and Safety Comments Rating Safety of access Along designated footpath 8 Safety of exposure Steep-sided valley, overhangs in places 6 Restricting conditions High-flow episodes 9 Multiple exposure None   Note It [...]
By admin on August 28, 2003 | Leave a comment