South Lancashire Coalfield: contour plan of the Trencherbonie Mine and Ashton Black Mine, by George Hickling. Two inches to one mile by Lancashire and Cheshire Coal Association 1924.

[section] showing faults and map folds South Lancashire Coalfield: contour plan of the Trencherbonie Mine and Ashton Black Mine, by George Hickling. Two inches to one mile by Lancashire and Cheshire Coal Association 1924.

Index of Colours (measured in feet) South Lancashire Coalfield: contour plan of the Trencherbonie Mine and Ashton Black Mine, by George Hickling. Two inches to one mile by Lancashire and Cheshire Coal Association 1924.

#coalfield #colours
#faults mixing #map folds

South Lancashire Coalfield: contour plan of the #Trencherbonie Mine and Ashton Black Mine by George Hickling. Two inches to one mile. October 1924. archive.org/details/WCWd...