Tag Archives: Lower Jurassic

Ironstone

Fan House, Grinkle Ironstone Mine and used for ventilation of the Grinkle Ironstone Mine which operated from 1865 to 1934. One of the few remains of the mine left, having been obliterated by the Cleveland Potash development. © Copyright Mick Garratt and licensed for reuse under this Creative Commons Licence


The history of local ironstone mining and the development of the Tees Valley are intimately linked.

The History of Ironworking in The Tees Valley
The earliest smelting of ironstone in the area is traceable to c.400BC, and the Iron Age, [...]

Alum

Loftus alum quarry (foreground) with Warsett Hill and Huntcliff in the distance.

The Alum Trade
The Alum Shale Member forms the upper part of the Whitby Mudstone Formation and was deposited in a reasonably well-oxygenated marine environment around 186 million years ago.The shales were extensively quarried between c.1604 and 1871 for the Alum trade which flourished here on the coast [...]

Jurassic

Cleveland Coast

Rocks of Jurassic age crop out exclusively south of the River Tees, with both Lower and Middle Jurassic successions well represented. The rocks indicate an episode of marine sedimentation, represented by the Lias Group, followed by alternating cycles of deltaic and marine sedimentation represented by the overlying Ravenscar Group.
Marker on the Cleveland Way east of [...]

Geological periods

The word Geology comes from the ancient Greek, Ge (γη) meaning Earth (not to be confused with Gaia (Γαια) the Greek Earth goddess) and Logos (λογος) meaning word or study of, amongst other things. So Geology literally means Study of the Earth.
The the addition of the letter ‘o’ to spell geo was simply to [...]

Slapewath

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 Main Seam Cleveland Ironstone Formation (bottom block) beside bridge footings below Fox & Hounds public house. A small waterfall immediately upstream may exist due to presence of the Pecten Seam. The area has [...]

By admin on September 24, 2003 | Leave a comment

Hummersea

The view east showing cliff and foreshore toward Loftus Alum Quarry from the top of Hummersea steps.

Superb sea cliffs and rocky foreshore (scar) with extensive Lias Group exposures. Much geomorphological and industrial archaeological interest. The Cleveland Way passes along the cliff top. The coastal scenery is impressive.

By cliff.rigg on July 1, 2003 | Leave a comment