Description of Section Measured at STOP 3 CARLILE SHALE Fairport Chalk Member Feet 26. Marly chalk, weathered grayish orange to dark yellowish orange, silty, relatively soft, tough, weathers blocky to crumbly, speckled, silt in this bed and similar beds below is calcareous . . . . . . . . . 0.8 25. Shaly chalk, weathered dark yellowish orange to grayish orange, soft, laminated, speckled; FOSSILS - Inoceramus cuvieri, Stramentum n. sp., Proboscina n. sp. . . . . . . . . . . . . . . . . . . . . . . . 6.6 24. Marly chalk, weathered dark yellowish orange, silty, soft, blocky, speckled. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.15 23. Bentonite and gypsum; upper bentonite is 0.1 foot thick, light gray to light olive gray; lower bentonite is pale yellowish brown to dark yellowish orange; bentonites separated by 0.05 foot of prismatic gypsum and 0.1 foot of shaly chalk; dark-yellowish-orange granular gypsum lies at top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.4 22. Shaly chalk, olive-gray weathering light olive gray to medium light gray, soft, tough, laminated; bentonite is 0.07 foot thick, pale yellowish brown to dark yellowish orange; FOSSILS - Inoceramus cuvieri, Ostrea congesta, Proboscina n. sp., shark tooth. . . . . . . . . . . . . . . 2.9 21. Marly chalk, olive-gray weathering light olive gray, soft, tough, speckled, silty, weathers blocky to crumbly . . . . . . . . . . . . . . 0.5 20. Shaly chalk, light-olive-gray weathering light gray to yellowish gray, soft, tough, laminated, speckled. . . . . . . . . . . . . . . . . . . . 0.9 19. Marly chalk, light-olive-gray weathering yellowish gray, silty, very soft, very thinly bedded, breaks blocky, speckled . . . . . . . . . . . . . . . . 0.6 18. Shaly chalk, like 20; FOSSILS - Inoceramus cuvieri, Ostrea congesta, Ser- pula semicoalita, Proboscina n. Sp. . . . . . . . . . . . . . . . . . 4.3 17. Bentonite and gypsum, bentonite 0.02 foot thick, weathered moderate yellowish brown, overlain by 0.18-foot gypsum seam stained dark yellowish orange by iron oxide. . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 16. Shaly chalk, like 20; bentonite near base is 0.05 foot thick, dark yellowish orange. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0 15. Bentonite, light-olive-gray weathering dark yellowish orange to light brown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 14. Shaly chalk, like 20; FOSSILS - Inoceramus cuvieri, Ostrea congesta . . 2.8 13. Chalky limestone, weathered dark yellowish brown to pale yellowish brown, silty, softer than unit 11, tough, speckled; silt is calcareous . . . . 0.35 12. Shaly chalk, like 20; bentonite in upper half is 0.1 foot thick, dark yellowish orange; FOSSILS - Inoceramus cuvieri, Ostrea congesta, Serpula semicoalita . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.6 11. Chalky limestone, weathered dark yellowish brown to grayish orange, medium-hard, speckled; FOSSILS - Inoceramus cuvieri . . . . . . . . . 0.2 10. Shaly chalk, like 20; FOSSILS - Inoceramus cuvieri, Ostrea congesta, Serpula semicoalita . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 9. Chalky limestone, like 11; FOSSILS - Inoceramus cuvieri . . . . . . . 0.2 8. Shaly chalk, olive-gray weathering light gray, very tough, laminated, speckled, with very thin lenses of skeletal limestone near top; bentonite is 0.05 foot thick, weathered dark yellowish orange; FOSSILS - Inoceramus cuvieri, Ostrea congesta, Collignoniceras woollgari, Actinocamax manito- bensis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1 54