Preserved dinosaur tracks; this obs is for the small tracks. More details on Wikipedia.
The landscaper found it in the grass above high tide level which seemed strange.
Leopard Shark (Triakis semifasciata), Martin Luther King Shoreline Park, Oakland, California
Orange flowers, thin green leaves
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seems to be 2 calves in the series
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Update- Bill Keener IDed one of the adults as "Skillet" ... see last photo
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