Figure F4. Close-up photograph of indurated skeletal grainstone at the top of Unit II capped by a reddened 2- to 4-mm-thick phosphatic crust (interval 194-1197B-2R-1, 0-20 cm). Large borings are present (arrows), infilled with phosphatic sand or foraminifer grainstone (L).

Figure F4. Close-up photograph of indurated skeletal grainstone at the top of Unit II capped by a reddened 2- to 4-mm-thick phosphatic crust (interval 194-1197B-2R-1, 0-20 cm). Large borings are present (arrows), infilled with phosphatic sand or foraminifer grainstone (L).