My personal opinion is that a shattercone should contain dozens of well-defined linations that eminate from a single point, thus making a cone shape. The best examples from the U.S., come from Kentland (Indiana) and Sierra Madera (Texas) where they form in limestone rocks. Limestone is the best lithology for production of shatercones due to its small grain size, as compared to sandstones and crystalline rocks like granite where the grain size is larger.
Matt Morgan
Tom aka James Knudson wrote:
Hello List, I am contemplating adding a shatter cone to my collection, but, I know nothing about them! Can someone tell me what to look for when shopping for a shatter cone? I am only getting one, so I want it to be the right one! : ) Thanks, Tom peregrineflier <>< IMCA #6168
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