Sponge-Bivalve-Coral reef mound. Sponges dominated the reef mound followed by bivalves, corals and echinoid fragments. The skeletal content within the overall middle ramp environment is low. Micrite comprises 79% while sparry calcite comprises 2%. Radiolarians, and ammonoids dominate this environment. Thus, we categorize this section as the Radiolarian-Ammonoid Biofacies. The sponge reef mound is largely matrix supported with skeletal content.