The 10 years I've been there, never heard the term slurry. I've worked with it, and it's always been called cosmicoat, asphault sealer. What I find puzzling, 1, they didn't have these type of streets in the 1880's. They had dirt, or gravel. 2, The park first opened as such, and later added wood chips to the pathways. I've never understood the passion for something stinky that sticks to your shoes when it's hot, and is BAD for the environment. Off that box...