Figure F3. Volcanic ash from Unit I (interval 190-1175A-10H-5, 18-45 cm). The gray ash has a sharp base and diffuse top. Incorporated in the ash is greenish gray silty clay.

Figure F3. Volcanic ash from Unit I (interval 190-1175A-10H-5, 18-45 cm). The gray ash has a sharp base and diffuse top. Incorporated in the ash is greenish gray silty clay.