A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Selma Chalk (Cretaceous), Oktibbeha Co., Mississippi, USA |
|---|---|
| Description | This soft, fine grained, earthy rock is composed almost entirely of calcite. It appears homogeneous in hand specimen. Most limestones form by precipitation and thus are considered chemical sedimentary rocks. This rock, however, contains clastic material: in thin section, foraminifera shells and fragments of larger fossils can be seen. The photo is about 10 cm across. |
| Chronostratigraphy | Cretaceous |
| Lithostratigraphy | Selma Chalk |
| Location | USA ▹ Mississippi ▹ Okibbeha County |
| Photographer | Darla Sondrol. 2000. |
| Collection | Ward’s Collection of Classic North American Rocks #63. |
| Key words | calcite, chalk, Mississippi |
| Tech details | 758 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 17 |
 | |