A basal age ( from a bentonite horizon ) of the Stretton Group is given as 555.9Ma + /-3.5Ma.
2.
Ice cores taken from Kilimanjaro's Northern Ice Field ( NIF ) indicates that the glaciers there have a " basal age " of about 11, 700 years, although an analysis of ice taken in 2011 from exposed vertical cliffs in the NIF supports an age extending only to 800 years BP.
मोबाइल