M Schulman
5/27/2016 12:53:30 PM |
Great comments and thank you very much John for your expertise! Looking at the flow pattern in photo #2, to me it really seems to corroborate exactly what you are saying. It looks like the fusion crust is flowing away from the nose. |
John Divelbiss
5/27/2016 12:09:47 PM |
To understand the overall flight orientation of this specimen and many others like it from this Fall, the top surface of photo #1 is the bottom of the stone in flight. The leading nose cone is on the left side of photo, and the tail is on the right. The top of photo #4 is the top of the stone in flight. Stable ride at thousands of feet per second at a flat 18 degrees +/- angle... this reality of a chunk of stone forming a shape by high speed flight is hard to relate to in human terms. |
John Divelbiss
5/27/2016 9:00:21 AM |
Nice stone. Seeing Photo #2, it appears this is another Chelyabinsk "projectile", bullet-shape, or in this case more like a small cannon shell. The back end ridge/rim and the surrounding reddish "low pressure" crust are the oriented-stable flight identifiers. |
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