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BEAUTIFUL SHATTER CONES IN AMPHIBOLITE FROM THE SAARIJÄRVI IMPACT STRUCTURE LOCATED IN NORTHERN FINLAND. 

COORDINATES OF THE CRATER CENTER: 65.17 N / 28.23 E

THE DIAMETER OF THE SAARIJÄRVI STRUCTURE IS ABOUT 2.2 KM AND ITS INNER DEPRESSION IS FILLED BY A CIRCULAR LAKE.

AGE APPROX. 600 - 1980 MILLION YEARS.

SHATTER CONES ARE PRODUCED WHEN AN IMPACT SHOCK WAVE WITH pressures OF ABOUT 2 GPa  TO 30 GPa  PASSES THE TAGRGET ROCK DEEP BELOW THE POINT OF IMPACT.

SHATTER cones have proven to be a reliable field criterion for identifying and studying impact structures.

sHATTER CONES are generally accepted as unique indicators of shock pressures and meteorite impact.

BEAUTIFUL DISPLAY PIECES CLEARLY SHOWING THE TYPICAL HORSETAILING SURFACE STRUCTURE WELL DEMONSTRATING THE SHOCK WAVE'S INFLUENCE ON TERRESTRICAL ROCK OF THE TARGET AREA. 

MOST OF THE SAMPLES ARE SHOWING THE HORESE TAILLING SURFACE STRUCTURE ON MORE THAN ONE SIDE.




 
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