EntityQ3568756· pop 6· linked from 21 articlesWilliam H. KeatingSign in to saveAmerican geologist (1799–1840)ConnectionsFranceCountrySwitzerlandCountryLondonCityEnglandEntityIrelandEntityInternational Standard Book NumberEntityGreat LakesEntityminingEntityWilmingtonEntityUniversity of PennsylvaniaEntityWest IndiesEntitygeologistEntityInternational Plant Names IndexEntitylist of botanists by author abbreviationEntityYounger DryasEntityAmerican Philosophical SocietyEntityauthor citation in botany and mycologyEntityLake AgassizEntitybotanical nameEntityStephen Harriman LongEntityCategories1799 births1840 deaths19th-century American geologists19th-century American non-fiction writersAmerican people of Irish descentBotanists with author abbreviationsMembers of the American Philosophical SocietyScientists from Wilmington, DelawareUniversity of Pennsylvania alumniUniversity of Pennsylvania facultyYounger Dryas