@inbook{https://resolver.caltech.edu/CaltechAUTHORS:20130430-141133088, title = "Global Perspectives on Ordovician Geology", chapter = "Paleomagnetic results from the Cambrian-Ordovician boundary section at Black Mountain, Georgina Basin, western Queensland, Australia", year = "1992", url = "https://resolver.caltech.edu/CaltechAUTHORS:20130430-141133088", id = "record", isbn = "9789054100485" } @inbook{https://resolver.caltech.edu/CaltechAUTHORS:20160309-094733984, chapter = "A Case for Catastrophic True Polar Wander in the Cambrian", year = "1991", url = "https://resolver.caltech.edu/CaltechAUTHORS:20160309-094733984", id = "record" }