Making Magic

A couple of years ago I attended a tufa crevice workshop at Robin's led by Harvey Wrightman. Fortunately for us he brought lots of tufa rock. "Tufa", you say, "What's that?" Okay, think of what accumulates when hot springs leach out limestone. We're talking in earth building times, not overnight. It's a very porous material that accumulates. Think Illion Gorge in New York or maybe Mackinac Island in Michigan, or other places in B.C. with funny limestone mounds. Essentially it is precipitated material, either biological or chemical, of Calcium Carbonate, CaCO3. Sure there can be other materials in it that cast a different color to it. And notice it's not just hot springs spouting. It also happens in freshwater streams. Don't you just love how the metabolism of algae, bacteria and mosses play the part in a biological formation? Once I found a handful in a fast moving stream in the Adirondacks. It was hard but crushable. And it's not something you can find on Google Shopping. So for Harvey to haul a truckload for us was in of itself, a wondrous thing. 

That workshop drew people from five states. Such was the rarity of the opportunity. We had a wonderful day for it, and all went home well satisfied with their prizes. So last year when I asked BNARGS, my local rock garden chapter: "What kind of programs do you want next year?" the response came - "Workshops in April." Thinking back to that previous wonderful day, I arranged for the return of Harvey and "The Tufa Crevice Workshop." Lucky for our chapter Dean, one of our NY members, was able to bring a truckload of Illion Gorge tufa. Wohoo Dean!
Dean's Tufa