Significance
Very high
Mesosaurid reptiles, rare cephalochordates, variety of palaeoniscoid fish, small eocarid crustaceans, insects, low diversity of trace fossils (e.g. king crab trackways, possible shark coprolites), palynomorphs, petrified wood and other sparse vascular plant remains (Glossopteris leaves, lycopods etc)
Additional Comments
High carbon content of mudrocks is probably derived from phytoplankton blooms.
Anoxic quiet-water bottom conditions promoted frequent preservation of intact skeletons of animal life.
Distinctive Ecca Sea fauna also found in S. America – early historical evidence for Gondwana supercontinent.
Coeval with Ecca Coal Measures of Gauteng, KZN (Vryheid Fm).
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