A Geoscience Digital Image Library
A Geoscience Digital Image Library
| Title | Aragonite nodule from near Fischer, Arizona |
|---|---|
| Description | Aragonite, a polymorph of calcite, has many different appearances. Here we see a nodule with radiating structure and “popcorn” on the outside. At the Earth surface, aragonite is thermodynamically less stable its polymorph calcite. Yet, it often forms by disequilibrium processes. This sample is 10 cm across. |
| Location | USA ▹ Arizona. Near Fischer. |
| Photographer | Nessa Eull. 2001-06-13. |
| Collection | University of North Dakota Mineralogy Collection #665. |
| Key words | aragonite, Arizona |
| Tech details | 452 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens. |
| GeoDIL number | 731 |
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