Rugose Coral Specimen

Lophophyllidium and Stereostylus are the two known genera of Rugose Corals in the Glenshaw Formation. Locally in the Brush Creek limestone, they are common to find. Unfortunately, they are hard to recover from the hard limestone and don’t come out in one piece. The Pine Creek limestone locality, however, isRead More →

Many rugose horn corals occur local to the Pennsylvanian rocks of Armstrong County, Pennsylvania. Stereostylus is a common solitary horn coral in Pennsylvania. The subclass Rugosa Milne Edwards & Haime 1850 went extinct at the end of the Permian during the most significant known mass extinction. The specimens below showRead More →