Subhedral pyroxene in greenstone, No. 48 - full thin section

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

Subhedral pyroxene grains in greenstone. Specimen No. 48, cobble in glacial gravel, southeastern Michigan. Provenance likely northern Ontario. Macrophotograph in cross-polarized light. Imaged area 22mm by 38 mm.

Below: polished cross-section of cobble from which sample was cut. Optical scanner image. Long dimension 6.3cm.

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

Euhedral pyroxene in greenstone (full thin section)

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

Euhedral pyroxene crystals in greenstone. Specimen No. 54, cobble in glacial gravel, southeastern Michigan. Provenance likely northern Ontario. Macrophotograph in cross-polarized light. Imaged area 21mm by 39mm.