Marshalltown Formation

The Marshalltown Formation is a Mesozoic geologic formation. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.

Dinosaurs known from the formation:


 * Hypsibema crassicauda
 * Hadrosaurus sp.
 * Nodosauridae indet.
 * Dryptosaurus sp.
 * Tyrannosauroidea indet.
 * Dromeosauridae indet.
 * Theropoda indet.