An Esmeraldina roweii multi-block of lovely trilobites from the Lower Lower Cambrian Poleta Formation of Esmeralda County, near Goldfield Nevada, plus a very interesting creature off to the lower left who looks to be an unidentified arthropod.
A very developed trilobite with long genal and axial spines, plus the ability to enroll. And all of this before the Olenellids existed. Collection of the deeply awesome George Walter Ast. Goldfield is located 247 miles southeast of Carson City, along U.S. Route 95.