A planktonic foraminiferal fauna of probable late Aptian age is recorded in Cores 113-693A-47R and -48R, located on the Antarctic continental margin. Moderate to highly productive surface waters and upper bathyal paleodepths are inferred from benthic and planktonic foraminifers, and other biotic and mineral components in the >63 µm size fraction.

For the planktonic foraminifers, relative abundances are as follows: Abundant = >25%; Common = 16%-25%; Few = 6%-15%; Rare = 3%-5%; and Very rare = <2%.

Supplement to: Leckie, R Mark (1990): Middle Cretaceous planktonic foraminifers at the Antarctic margin: Hole 693A, ODP Leg 113. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 319-324