A formation of greenish-gray sandstone near Catawissa Creek has been olive colored sandstone that is home to Spirifer fossils.
2.
Carboniferous Arkansas was home to " Pennsylvanian Arkansas was home to the blastoid " Pentremites ", the brachiopods " Composita " and " Spirifer ", and other invertebrates.
3.
In the field of paleontology, he performed pioneer " zoometric " research of a species of brachiopod known as " Spirifer verneuilli " ( " Etudes sur les variations du Spirifer Verneuilli " ).
4.
In the field of paleontology, he performed pioneer " zoometric " research of a species of brachiopod known as " Spirifer verneuilli " ( " Etudes sur les variations du Spirifer Verneuilli " ).