|Image Name||Width x Height||Size|
|SIA1357.jpg||640 x 391||48K|
|SIA1357.jpg||1200 x 733||156K|
|SIA1357.jpg||3504 x 2140||1M|
This almost pure copper sheet formed between layers of shale. Water ripples preserved in the shale are imprinted in the copper. The dark regions are bits of shale still attached to the copper.