Original age call: Caradocian-Ashgillian
Small coral-stromatopore bioherms in Den Formation (Gordon Group).
Tabulate (favositid, heliolitid, halysitid) corals, rugose (solitary and compound) and diverse stromatopores (10 species assigned to 2 morphotypes) are important.
Some bioherms dominated by stromatopores, others by corals (mostly tabulates).
Environment characterized as outer platform, but fitting to ramp as well.