Fig. 10. Formation Microimager log showing typical grain size and bedding characteristics for the pumice-rich volcaniclastic rocks in Well R-19. Two representative depth intervals are shown (516.9–520.3 m, 1696–1707 ft and 534.8–538.0 m 1754.5–1765 ft). These strata are fine grained and thinly bedded compared with the overlying Puye Formation and underlying older fanglomerate unit. Subordinate gravel and cobble beds (e.g., 535.5- and 537.1-m, 1757- and 1762-ft depths) are interbedded with the sandstones of this unit. Green horizontal lines indicate bedding planes used to determine bedding orientations.