Lancashire 73nw, 6". Lydgate, 1912/1925, black outline, red geology, In fair condition.
Lancashire 73nw, 6". Lydgate, 1912/1925, black outline, red geology, In fair condition.
About the England Six Inch County Series (later edition)
These early 20th century geological maps are at 1:10,560 scale, based on county layout. Each sheet covers 2 x 3 miles in considerable detail.