David K. Joyce Minerals

Rocks and Ores -Shatter Cones and Breccias

The Sudbury area is renowned for the prolific copper-nickel-PGE orebodies that have been mined for over a century. The mineralization at Sudbury is directly linked to geological events immediately after the impact of a large bolide meteorite. The impact caused a 250km radius crater that is the second largest known impact crater on earth. There is much evidence for this impact that happened 1.849 billion years ago, including the presence of shatter cones throughout the vicinity of the impact. Shatter cones reflect the stress/strain, on brittle rocks, under the impact of the meteorite. Here are examples of shatter cones in the Huronian-age quartzites from the Sudbury Region. Extra postage will be required for the larger cones.

Sudbury Breccia is a term coined for footwall breccia veins formed as the result of the impact opening veins in the footwall rocks beneath the crater. The veins are irregular and in general form a band of veins parallell to the Sudbury Igneous Complex. The veins are composed of fragmented and melted rocks. The breccia is coined pseudotachylite rock. These are breccias composed of glass matrix as veins filling voids around footwall rocks fragments. Of course, the glass has been metamorphosed and is now a fine grained rock having an average composition of the rocks they are occuring in. This rock type only formed in larger craters and is definite proof of the existance of a crater.

All prices in Canadian dollars. For payment in US$, deduct 20% or multiply by 0.8.

Click on any of the following thumbnails to view a larger image of the specimen.

Shatter ConeRocks and Ores -Shatter Cones and Breccias
  • Item #15910
  • Shatter Cone
  • 17.5x9.5x4.5 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Sudbury

  • Ontario, Canada
  • An excellent example of a shatter cone that resulted from the impact of the Sudbury meteor, 1.85 billion years ago. From the SE corner of the impact crater.
Shatter ConeRocks and Ores -Shatter Cones and Breccias
  • Item #15908
  • Shatter Cone
  • 8.7x6.2x2.8 cm
  • Largest Crystal Size: n/a
  • $50.00
  • Sudbury

  • Ontario, Canada
  • About 1.85 billion years ago, a meteir impacted on the present-day site of Sudbury, Ontario. "Fingerprints in the guise of "shattercones" are witness to that impact.
Shatter ConeRocks and Ores -Shatter Cones and Breccias
  • Item #15909
  • Shatter Cone
  • 12.3x8.1x3.3 cm
  • Largest Crystal Size: n/a
  • $75.00
  • Sudbury

  • Ontario, Canada
  • This excellent example of a shattercone is a testament to the strain and energy of the impact of a meteorite 1.849 billion years ago. Amazing!
Shatter ConeRocks and Ores -Shatter Cones and Breccias
  • Item #15911
  • Shatter Cone
  • 18.1x5.8x3.8 cm
  • Largest Crystal Size: n/a
  • $65.00
  • Sudbury

  • Ontario, Canada
  • This elongated shattercone shows well the strain inflicted on the rock surrounding the Sudbury meteorite impact 1.849 billion years ago.
Shatter ConeRocks and Ores -Shatter Cones and Breccias
  • Item #15912
  • Shatter Cone
  • 24.0x14.5x6.5 cm
  • Largest Crystal Size: n/a
  • $160.00
  • Sudbury

  • Ontario, Canada
  • A rather large, excellent example of a shatter cone!
Shatter ConesRocks and Ores -Shatter Cones and Breccias
  • Item #15913
  • Shatter Cones
  • 20.5x19.0x9.3 cm
  • Largest Crystal Size: n/a
  • $160.00
  • Sudbury

  • Ontario, Canada
  • An exemplary example of shatter cones, several overlapping stress forms on this piece. Really good!
Sudbury BrecciaRocks and Ores -Shatter Cones and Breccias
  • Item #15919
  • Sudbury Breccia
  • 11.1x6.0x1.7 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Levack Mine
  • Levack Township
    Ontario, Canada
  • Excellent example of the pseudotachylite, the Sudbury Breccia that resulted from the fallback of the Sudbury meteorite 1.85 billion years ago.
Sudbury BrecciaRocks and Ores -Shatter Cones and Breccias
  • Item #15920
  • Sudbury Breccia
  • 11.0x7.5x1.5 cm
  • Largest Crystal Size: n/a
  • $45.00
  • Levack Mine
  • Levack Township
    Ontario, Canada
  • A very good example of a pseudotachylite, the fallback breccia resulting from the impact of the Sudbury meteorite. 1.85 billion years old!