abstract
The Ahlmannryggen Group is the lower predominantly sedimentary part of the Ritscherflya Supergroup, a Precambrian platform deposit occurring in the Ahlmannryggen and Borgmassivet areas of western Dronning Maud Land, Antarctica. A new stratigraphic subdivision is proposed on the basis of 21 measured stratigraphic sections (at 20 localities in the Borgmassivet and one in the Ahlmannryggen) and on the application of the lithofacies concept.