Cales Dale Cave (upper)
Entrances located inside boundary of National Nature Reserve and access subject to terms of formal agreement between DCA & Natural England. No prior permission required, but all visiting groups must be affiliated to the British Caving Association.
() , Quart. Jour. Geol. Soc. Vol.31., pp.238-240.,
(1913) , Geol. Mag. Vol.60, pp.259-262.,
(1956) , The Speleologist No.4., pp.174-175. ,
(2010) , Caves of the Peak District, p. 230, DCA