| Top to bottom photos--Fusulinids (an extinct single-celled animal that secreted roughly wheat grain to American football-shaped shells) in a polished cross-section of limestone; assigned to the genus Triticites from the upper Pennsylvanian Beil Limestone. Spiral specimen at lower right is a cross-section of a cephalopd. Bottom--Fusulinids assigned to the genera Triticites, preserved in their natural matrix, from the upper Pennsylvanian Beil Limestone. All specimens in both images from the Shawnee Group, Virgilian Stage--303 to 301 million years old. Specimens collected and photographed by an individual who goes by the cyber-name Missourian. I edited and processed the images through photoshop. |