The Ingersoll shale contains a rare occurrence of Rhizocorallium in Cretaceous estuarine muds.
Ingersoll specimens are most allied with Rhizocorallium commune var. irregulare.
Ingersoll Rhizocorallium were emplaced in a firmground produced by bay-shoreline ravinement.
Ingersoll Rhizocorallium were produced by either crustaceans or worms.
Trace makers likely were suspension feeders that took advantage of bay-head wave or tidal currents.