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<p>[QUOTE=&quot;mikediamond, post: 2123716, member: 1859&quot;]The subequal strength of the rings would remove that diagnostic from consideration.&nbsp; So in this case, you rely on two other diagnostics.&nbsp; One is the aforementioned sharp, slightly irregular internal margin.&nbsp; The second is the rough floor of the depression.&nbsp; If this was a weak strike, the floor of the ring would simply preserve the original surface texture of the planchet, which is relatively smooth, with perhaps a smattering of tumbling marks.[/QUOTE]</p><p><br /></p>

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