Clast-Inception of the Onaping Formation - Sandcherry member. These clasts represent fall-back eject
Clast-Inception of the Onaping Formation - Sandcherry member. These clasts represent fall-back ejecta breccia from a bolide collision with Earth 1.85 billion years ago that formed the Sudbury Basin/Structure. Some of the clasts have a dark glassy rim that formed as melt crystallized around the fragments. -- source link
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