Some changes to make boundaries better. When an interval switches places in a scale its children prior to the switch get invalidated. Zechstein case. 
Some changes to make boundaries better. When an interval switches places in a scale its children prior to the switch get invalidated. Zechstein case. 

paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new,paleobiodb/pbdb-new