Figure F23. This piece of Unit 23 consists of a clastic domain that has been intruded by an apophysis of flow-banded lava. The coherent domain and the fragments in the clastic domain have the same composition, and we interpret this texture as a synvolcanic intrusion of molten lava into its own autoclastic breccia, and hence as a paleoseafloor horizon (Sample 193-1189B-14R-1, 65-75 cm).