| Detailed outcrop studies show that the ichnology of five subenvironments within IFS are distinctive. |
| Stratigraphy, sedimentology and ichnology of the Cambrian-Ordovician Saint John Group, southern New Brunswick, Canada. |
| For several years after this he assisted his father in arranging the museum and compiling tables for the ichnology. |
| His research interests include ichnology and geology of the lower Paleozoic of north Wales, the Paleozoic of eastern Canada and Maine, and the Cenozoic of the Antilles. |
| Invertebrate ichnology of continental freshwater environments. |
| The stratigraphy, sedimentology, and ichnology of the Mabou Group and Cumberland Group, western Cape Breton Island, eastern Canada. |
