A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Thin section of alkalic granite |
|---|---|
| Description | This is the cross polarized thin section of alkalic granite. It consists of K-feldspar which is the dark gray in the upper right corner. The quartz is the lighter gray crossing right through the middle of the photo. The amphiboles are the black (opaque) area. The pyroxene (aegirine) is the darker gray shown in the upper left corner. The brown area is the original mafic mineral. |
| Chronostratigraphy | Carboniferous (Probably Mississippian) |
| Geologic province | Quincy Granite |
| Location | USA ▹ Massachusetts ▹ Norfolk. Near Quincy. |
| Photographer | Darla Sondrol. 1899-12-30. |
| Collection | Ward’s Collection of Classic North American Rocks #4. |
| Key words | granite, intrusive, igneous, Massachusetts |
| Tech details | 1.35 MB. Thin section. Nikon FDX-35. |
| GeoDIL number | 1524 |
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