32. Shaly chalk, like 34, with very thin lenses of skeletal limestone in lower 2.0 feet and two beds of chalk, the upper extensively burrowed, near top of unit; FOSSILS - Inoceramus pictus . . . . . . . . . . . . . . . . . 4.9 31. Bentonite, yellowish-gray weathering grayish yellow to dark yellowish orange. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 30. Shaly chalk, like 34, with scattered very thin lenses of skeletal lime- stone; bentonite is yellowish gray to dark yellowish orange; FOSSILS - Inoceramus pictus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.3 Total thickness of Hartland Shale Member 28.4 Lincoln Limestone Member 29. Shaly chalk and limestone; shale like 34, with numerous limestone laminae; limestone pale yellowish brown, hard, skeletal, with petroliferous odor, in part gently cross-laminated; layer of weathered marcasite nodules in lower half; FOSSILS - Inoceramus pictus, Squalicorax, Hedbergella . . . 2.0 28. Shaly chalk, olive-black weathering dark yellowish brown to grayish orange, tough, laminated, speckled, with scattered thin lenses of fine- grained skeletal limestone and a single bed of olive-gray chalk; six bentonite seams are mostly dark yellowish orange; FOSSILS - fragments of Inoceramus, fish bones . . . . . . . . . . . . . . . . . . . . . . 4.5 27. Shaly chalk, like 28, with scattered very thin lenses of hard, brittle, skeletal limestone and two dark-yellowish-orange bentonite seams; FOSSILS - Inoceramus pictus, fish bones, worm castings. . . . . . . . . . . . 5.0 26. Bentonite, dark-yellowish-orange. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 25. Shaly chalk, like 34, with very thin lenses of hard, brittle, skeletal limestone that has a petroliferous odor where fresh; FOSSILS - Inoceramus pictus, cirriped, fish bones. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 24. Bentonite, dark-yellowish-orange. . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.27 23. Shaly chalk, like 34; FOSSILS - Inoceramus pictus, fish remains . . . . . . . . . . 1.7 22. Bentonite, yellowish-gray weathering dark yellowish orange. . . . . . . . . . . . 0.15 21. Shaly chalk, weathered light gray to grayish orange, soft, laminated, speckled, with a few very thin lenses of hard skeletal limestone that has a petroliferous odor where fresh; FOSSILS - Inoceramus pictus, Stramentum sp., Ostrea sp., unidentified ammonite, fish remains. . . . 1.2 20. Chalky limestone, weathered light brown to grayish orange, weathering to very thin beds or laminae; FOSSILS - Inoceramus pictus, 2 uniden- tified ammonites (molds). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 19. Shaly chalk, middle part olive-black, remainder weathered dark yellow- ish brown to grayish orange, tough to soft, laminated, speckled; FOSSILS - Inoceramus pictus, fish remains . . . . . . . . . . . . . . . . . . . . . . 3.1 18. Chalky limestone, light-olive-gray weathering dark yellowish orange, with limonite stain through center of bed; FOSSILS - fish remains . . . . . . . . . . . . . . . . . . . . . . . . 0.5 17. Shaly chalk, weathered grayish orange, soft, laminated, speckled, with numerous very thin lenses of skeletal limestone and a nearly white, dark-yellowish-brown-weathering bentonite at top; FOSSILS - Inoceramus fragments and prisms, fish remains. . . . . . . . . . . . . . . . . . . . . . . 0.7 16. Skeletal limestone, pale-yellowish-brown to light-olive-gray weathering dark yellowish orange, hard, brittle, petroliferous odor, thinly lami- nated to gently cross-laminated, some quartz grains, weathered pyrite nodules near top; basal 0.25 foot conglomeratic, with quartz grains, bentonite pebbles, fish teeth and bones; FOSSILS - Inoceramus pictus, fish remains, Ostrea beloiti, Hamites? sp., unidentified ammonites, cirriped plates, coprolites . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.9 Total thickness of Lincoln Limestone Member 21.3 Total thickness of Greenhorn Limestone 90.8 52