While most people know Horace H. Hayden
as the founder of the first dental school in America, he’s got another claim to fame!
Dr. Hayden was one of the founders of the Maryland Academy of Sciences and served as its president in 1825. In 1820, as a pioneer geologist and botanist, he published the first general work on geology to be printed in the United States.
He discovered the mineral called Haydenite, obviously named after him. It’s only been found in one place: the Jones Falls Valley which bisects Baltimore City. There have always been quarries along the Jones Falls, including one at Bare Hills. The specific quarry where Haydenite was found is at the intersection of the Jones Falls and Stoney Run, somewhere around North Avenue and Maryland Avenue.
