adj.not capable of being given a date

Dating the Undatable
Externally undatable rom (eurom)
Review: Dating the Undatable
Dating otherwise undatable rocks - I. Conodonts put teeth into Cordilleran geological mapping
Dating otherwise undatable rocks: radiolarians, the "quartz watches"of the Canadian Cordillera
Tony Hicks: New book shows how men are undatable -- it reads like my biography
Dating the undatable: novel techniques for 14C dating of sub-ice shelf Antarctic sediments near the Larsen C ice shelf
“Undatable, unattractive, redundant”? The Rapavi silcrete source, Saint-Pierre-Eynac (Haute-Loire, France): Challenges studying a ...
Prefaces &c. to the collected editions ; Published addenda ; Marginalia ; Manuscript addenda ; Undatable manuscripts
Dating the Undatable Chronology, Migration and Drought in Interlacustrine Africa. Edited By J. B. Webster. London: Longman; New York...