A saw cut reveals a fragmental breccia with numerous white feldspathic clasts and fine-grained lithic fragments
Lieberman 2008
CaCO3 (the other forms being the minerals calcite and vaterite)
Septarian concretions or septarian nodules
Layer upon layer of silica built up within the pocket
30858 - Nicely Preserved 1.45 Inch Harpes perradiatus Lower Devonian Trilobite Crustaceans A saw cut reveals aHarpes perradiatus, Richter and Richter 1943 Harpes Harpetidae PaleoDB taxon number: 313570 Alternative combination: Helioharpes perradiatus Belongs to Harpes according to M. C. Ebach and K. J. McNamara 2002 Sister taxa: Harpes acuminatus, Harpes dvorcensis, Harpes escoti, Harpes fornicatus, Harpes forojuliensis, Harpes gracilis, Harpes koeneni, Harpes latilimbatus, Harpes macrocephallus, Harpes macrocephalus, Harpes neogracilis, Harpes nymageenensis,