1. Dynamical formulation of Broecker's model for marine cycles of biologically incorporated elements

   • John R. Southam
   • William W. Hay

   OriginalPaper Pages: 511 - 527

2. Sequence in Australian coal seams

   • M. Smyth
   • A. C. Cook

   OriginalPaper Pages: 529 - 547

3. A mathematical model for orientation data from macroscopic cylindrical folds

   • D. Kelker
   • C. W. Langenberg

   OriginalPaper Pages: 549 - 559

4. Mineral variation in anorthositic, troctolitic, and adamellitic rocks of the Barth Island layered structure in the Nain anorthosite complex, Labrador

   • D. de Waard
   • K. Mulhern
   • D. F. Merriam

   OriginalPaper Pages: 561 - 574

5. A method for determining optimum sample size in species diversity studies

   • Pascal de Caprariis
   • Richard H. Lindemann
   • Catharine M. Collins

   OriginalPaper Pages: 575 - 581

6. Association announcements

   • F. P. Agterberg

   Announcement Pages: 583 - 587

7. Reviews

   • R. H. Wimble
   • J. E. Robinson
   • D. F. Merriam

   ReviewPaper Pages: 589 - 596