Pseudomorphs after pyroxene in greenstone

Click on image to enlarge.          Photo © Daniel R. Snyder

Above: Serpentine pseudomorphs after pyroxene. Greenstone, specimen No. 5. Pebble in glacial gravel, southeastern Michigan. Provenance likely northern Ontario. XPL. Imaged area 2.7mm by 4mm.
Below, as above. Imaged area 3.2mm by 3.5mm.

Click on image to enlarge.          Photo © Daniel R. Snyder

Below, as above. Imaged area 1.3mm by 2mm.