Thanks Mary. I understand. Tarmacadam (tarmac), a composite of stones and a tar-like substance invented in 1901-1902, was used extensively decades and decades ago, but I guess I'm just a nitpicker about not calling runways, taxiways, aprons and ramps "tarmac" when in fact very nearly, if not all, are now concrete. The last time I saw a tarmac runway, was one I was forced to use at an oil drilling operation in 1979 in the Libyan Sahara near Wadi KUfra.
