page_title: Lawrence Alexander Hardie
section_title: Academic career
hierarchical_section_title: Lawrence Alexander Hardie / Academic career
caption_attribution_description: English: Lawrence A. Hardie driving Honda All Terrain Vehicle in Baja California, Mexico during a geology field trip in the early 1980s. Photo by his son R. C. Hardie.
context_page_description: Lawrence Alexander Hardie was an American geologist, sedimentologist, and geochemist. For nearly 50 years, he mentored students and pursued research as a Professor at Johns Hopkins University in Baltimore MD in the Department of Earth and Planetary Sciences. He authored or co-authored many scientific papers and several books.
  Hardie's research topics included evaporites, dolomitization, cyclical deposition of carbonate sediments, and plate tectonic driven changes in seawater chemistry. In the latter, he proposed that changes in the seafloor spreading rates at mid-ocean ridges have altered the composition of seawater throughout earth history, producing oscillations in the mineralogy of carbonate and evaporite precipitates. Specifically citing these scientific contributions, the Society for Sedimentary Geology awarded him the Francis J. Pettijohn Medal in 2003.
context_section_description: Hardie joined the faculty at JHU as an assistant professor in the Department of Earth and Planetary Sciences in 1965.  He later became a full professor, mentoring more than 30 graduate students. He also taught introductory geology to many undergraduate students, including his own children, introducing them to the intricacies of geological process through extensive field trips.   He also served as the department chair from 1992 to 1995, and again in 2004–2006.  He retired in 2007 to the status of professor emeritus.
  Hardie ran the JHU field camp (Camp Singewald) in western Maryland for many summers in the 1960s and 1970s.  He led regular field trips to the Florida Keys and Assateague Island, and also took students to the Bahamas and Baja California, Mexico.  His work also took him frequently to the Dolomites in Italy, and he partook in long hikes and climbs.  Some of his field work required travel by Zodiac inflatable boats, minibikes, and 3-wheeled all terrain vehicles.
caption: Lawrence A. Hardie driving Honda All Terrain Vehicle in Baja California, Mexico during a geology field trip in the early 1980s.  Photo by R. C. Hardie.
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