Very high

Ediacaran shelly invertebrates, trace fossils, calcified algae, agglutinated tubes, early metazoans (possible sponges etc), organic-walled microfossils, vendotaenid “algal strings”, stromatolites and other biomat structures
Abundant Early Cambrian trace fossils (Fish River, Knersvlakte & Brandkop Subgroups)

Additional Comments

Key successions for body and trace fossils spanning the critical Precambrian (Ediacaran) / Cambrian boundary
Earliest known fossil shells in the world
Classic giant stromatolites,
World-class trace fossils

Vendobiontans expected (but not yet recorded)