Field Photos From the Sonoita Expedition 3/2001
| Urchin Spines Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Urchin Spines Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Crinoid Stem Cross Section with Urchin Spine Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Crinoid Stem Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Crinoid Section Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Crinoid Stem Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Crinoid Stem Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Phylum: Brachiopoda Class: Articulata Order: Strophomenidina Suborder: Productid Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |
| Phylum: Brachiopoda Class: Articulata Order: Strophomenidina Suborder: Productid Location: Near Sonoita Az. Age: Pennsylvanian Formation: Horquilla |  |