ðə sˈaʊθ mˈeɪtlənd kˈoʊlfiːldz wʌzðə mˈoʊst ɛkstˈɛnsɪv kˈoʊlfiːld ɪn nˈuː sˈaʊθ wˈeɪlz ʌntˈɪl ðə ɡɹˈeɪt kˈoʊl mˈaɪnɪŋ slˈʌmp ʌvðə nˈaɪntiːnhˈʌndɹɪd sˈɪksti z.
The South Maitland coalfields was the most extensive coalfield in New South Wales until the great coal mining slump of the 1960s.