A decaying - but still mostly complete - drum house near Aberllefenni, #Wales used to move slate up & down inclines #geology #thestoryofslate

View of obvious benching & steeply dipping quarry faces in the modern #Penrhyn Slate Quarry, North #Wales #geology #thestoryofslate

A grainy view of temporary rail ties laid down over slate tips in the Portland & Monson Slate Quarry, #Monson, #Maine. #geology #thestoryofslate

Historical image of slate quarrying #Bangor, #Pennsylvania depicting numerous headframes and aerial carriages, with quarrymen for scale. #geology #thestoryofslate

A well-preserved blast shelter nestled in a side 'canyon' of the #Dinorwig Slate Quarry, #Wales. #geology #thestoryofslate

Hand-colored wood engraving by Elisee Reclus capturing slate extraction in #Angers, France c.1878-94. #geology #thestoryofslate

Subtle but detailed watercolor of Conglog Quarry the captures the toppling pillars of a former slate incline c.1994 #geology #thestoryofslate

Sketch map of the Pen-y-Bryn quarry south of #Caernarvon, #Wales located in the Nantlle Valley. And a collection of haunting images from the Museum Wales: museum.wales/collections/... #geology #thestoryofslate

A stylized version of vertical slate fencing and sheep pens delineated by slate rock walls seen on Watkins Path to summit of #Snowdon #geology #thestoryofslate

Typical ladder (86' long) used by quarrymen (in the DARK) in the #Llechwedd Quarries, Blaenau #Ffestiniog, #Wales c.1893. #geology #thestoryofslate

Ground slate points from the Pacific Northwest demonstrating lenticular & hexagonal cross-sections. #geology #thestoryofslate

Circular slate bar-top created for the Royal Singapore Yacht Club from slate quarried in the Lake District, UK. #geology #thestoryofslate

A great video juxtaposing historical and modern slate mining in the Corris region of #Wales. It also features one of my favorite slate-related buildings, the 'Slate House' - the former office of the historic Aberllefenni quarry #geology #thestoryofslate
link.www.storyofslate.com/gXtgSE

A notice from Lord #Penrhyn warning quarrymen not to support the North #Wales Quarrymen's Union - it didn't work... #geology #thestoryofslate

Slate treads advertised in the J.S. Moyer & Co. 'Slate Products Catalog #2' from Bethlehem, PA c.1880 #geology #thestoryofslate

Cutting and dressing slates in the #Ballachulish slate quarry, Scotland c.1927. Interesting juxtaposition of slate on the roof in the background, metal on the splitting shed (likely because they moved so frequently). #geology #thestoryofslate

A detailed etching by Joan Williams c.1973 depicting slate tips, inclines and a few remnant drumhouses in North #Wales. #geology #thestoryofslate

A nice lithograph by Bernard Cheese illustrating the extensive stonework common in #Welsh quarries c.1962. link.www.storyofslate.com/QOYqDj #geology #thestoryofslate

Fantastic detail in this 1920 OS map: inclines, railways & mill buildings surrounding Blaenau #Ffestiniog, #Wales. #geology #thestoryofslate

Generalized geology of the Ardenne-Eifel area & Ardennes slate belt - apparently the first place where the term Boudin was used. #geology #thestoryofslate