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TWENTY YEARS IN MINERALS:
NORTHERN ENGLAND

Foreword
West Cumbria
Lake District
Caldbeck Fells
North Pennines

David Green • Peter Briscoe

THE SHAP GRANITE QUARRY,
CUMBRIA

Max Wirth • David Green

Front Cover of UKJMM No. 22.  Superb twinned yellow fluorite crystal 15mm on edge from Hilton Mine, Scordale, Cumbria. Peter Briscoe collection. Photo: David Green.
60 pages, full colour.

TWENTY YEARS IN MINERALS:
THE CLASSIC AREAS OF NORTHERN ENGLAND

David I. Green
Peter J. Briscoe

Mineral collecting in Northern England has a long and distinguished history. The mining districts of Cumbria, Northumberland and Durham include a remarkably large number of localities that are famous for fine specimens. Minerals from these locations are found in most of the world’s great collections. Although many of these specimens are ‘old-timers’, procured for the cabinets of well-to-do Victorians in the heyday of mining, the last two decades has substantially added to the number of discoveries and to our understanding of the mineralogy of the area.

 

Fluorite from Florence Mine.
Campylite from Dry Gill Mine.
A colourless fluorite cube 12 mm on its longest edge with hematite phantoms in one half of the crystal from Florence Mine, Egremont. William Creighton collection. Superb yellow crystal of campylite, 15 mm across, from Dry Gill Mine. Peter Briscoe collection.
Cerussite from Redburn Mine.
Pyromorphite from Hard Rigg Edge.

Superb jackstraw cerussite aggregate 90 mm across with typical blue staining from Redburn Mine, Rookhope, Durham. Ian Bruce collection.

A spray of pyromorphite crystals 25 mm tall from the Knapside veins, Hard Rigg Edge, Alston, Cumbria. David McCallum collection.

Photos: David Green.

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THE SHAP GRANITE QUARRY,
CUMBRIA

Max M. Wirth
David I. Green

The Shap Granite Quarry, on the eastern flank of the English Lake District, is one of the best known geological localities in Britain. It provides superb exposures of the distinctive and decorative Shap Granite, which are of international significance to research on the origin of granitic bodies and the formation of large feldspar megacrysts. In addition to the rock forming and accessory minerals, which have been described in the geological literature, the Shap Granite hosts a variety of less well known species on mineralised joint planes and in miarolitic cavities. These include bismuth-bearing, rare earth, and supergene minerals which have not been previously documented. We describe these, and summarise the forty or so other mineral species previously recorded from the Shap Granite.

Anatase from Shap Granite Quarry.    Brookite from Shap Granite Quarry.

Bastanite from Shap Granite Quarry.   Bavenite from Shap Granite Quarry.

Top left: A black anatase crystal 0.8 mm long with well developed steep straited pyramid faces terminated by the pinacoid (001). Collected by Max Wirth
Top right: Brown translucent striated brookite crystal with slightly darker phantoms, 0.6 mm in total length, associated with silvery muscovite on pink feldspar. Collected by Max Wirth.
Bottom left: Red to white mottled slightly weathered thick prismatic crystal of bastnasite-(Ce), 0.7 mm in length, in a miarolitic cavity in granite. Collected by Max Wirth.
Bottom right: Transparent bavenite plates to 0.8 mm with pyrite. C. Mike Leppington collection.
Photos: David Green.

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