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#11
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On Sat, 15 May 2004 21:56:33 -0400, knob wrote:
I'm about 1.2 hours Southeast of you in the heart of the Northwest Ohio Black Swamp. Ancient lakebed, flat as you can get. I am on a rocky ridge though. I dug about 4 feet down, how deep do you dig? I only have to dig a couple of feet or less to hit clay in my garden, but since this is a subdivision, that depth is undoubtedly in the region that has been disturbed by the developer's original contouring. Michigan has been extensively modified by glaciers, so I have no idea if there are any primary deposits around... but I seriously doubt it. Your rocky ridge might be a source of granite from which primary clay could erode. The question is where it would go after erosion. Most of the time, it is swept along and tumbled by stream action, and ends up as secondary clay somewhere else. I suspect that you need some sort of "settling basin" right below the ridge in order to have the primary clay end up there. Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis www.daqarta.com |
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#13
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I found a marvellous site for researching raw clay. It gives all the
information you need. www.covenantacres.com. After reading it, my admiration for clay suppliers increased tenfold as the work involved was too much for me. "Uncle John" wrote in message ... want to learn more based on a memory from their crazy dad. Maybe not. I've got my eye on a pile of bricks for my kiln already. Go to the library and request Michael Cardews book "Pioneer Pottery". It should answer most of the questions for you. John W |
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