Geological Gleanings. 183 



No. 5. Of the Nebraska general section, with its usual characters 

 and fossils — -150 ft. 



No. 4. Presenting its usual characters and containing its charac- 

 teristic fossils, — 150 ft. 



No. 3. Usual fossils and composition, — 150 to 200 feet. 



No. 2. Usual lithological characters and fossils, with some new 

 forms, — 200 to 250 ft. 



No. 1. Upper part yellowish and reddish sandstone, sometimes in 

 heavy beds, passing down into alternations of yellowish, 

 m J g ra y ; bluish, and reddish laminated shale, with seams and 



layers of dark carbonaceous matter or impure lignite ; be- 

 neath which there is a heavy bed of compact yellowish and 

 reddish sandstone, with indistinct vegetable remains, and 

 much fossil wood, — above beds variable at different places, 

 —300 to 400 ft. 



Then come alternations of light gray argillaceous grit, 

 and rather soft sandstone, containing Ammonites Henryi, 

 n. s. p., and a small oyster; also in bluish gray compact 

 argillo-calcareous masses Unio nucalis n. s. p., and a small 

 Planorbis, with other small univalves like Paludina. 

 f A. — Layers of argillo-calcareous, somewhat gritty mass, contain- 

 j ing Belemnites densus, n. s. p., Ammonites cordiformis, n. s. p., 



Avicula (Monotis) tenuicostata, n. s. p., Area (Cucullcea) 

 inornata, n. s. p. ; passing down into a 6 or 8 foot bed light 

 gray, or yellowish sandstone, with ripple marks and trails 

 of marine wcrm3, — 50 to 80 ft. 



B. — Light red argillo-calcareous gritty bed, with greenish seams, 

 and nodules (sometimes wanting), — 30 to 40 ft. 



C. — Soft gray and dark brownish sandstone, passing down 1 ] into 

 about 8 feet of laminated shale of various colors, below 

 which there is a 6 foot bed of sandstone similar to that 

 -{ above, containing Avicula tenuicostata, and trails of marine 



worms. Then comes 30 to 40 feet of bluish, or ash-cclored 

 argillaceous shale, with great numbers of Lingula bieviros- 

 tra, n. s. p., and Serpula. Next we have a light-gray cal- 

 careous grit, containing columns of Pentacrinus asteriscus, 

 n. s. p., Avicula tenuicostata, Serpula, &c, the more com- 

 pact and calcareous portions often perforated by Pholas ? 

 The latter bed passes down into a light-yellowish gray 

 sandstone, splitting into thin layers, and containing im- 

 perfect casts of Mytilus (Modiola) Pecten, Trigonia, and 

 other bivalves, in considerable numbers. Whole 60 to 

 100 ft. 

 ' D. — Brick-red, incoherent, argillo-calcareous, very fine slightly 

 gritty material, containing great quantities of gypsum in 

 the form of seams, layers, and irregular beds, — 100 to 150 

 feet. 



E. — Bluish and reddish gray, very hard gritty limestone, in which 

 were found a smooth spirifer like S. lineatus, two or three 

 species small Pleurotomaria, two species Macrocheilus and 

 one or two species of Bellerophon. This bed is variable in 

 thickness, — 10 to 50 ft. 



F. — Brick-red material, very similar to the bed D, excepting that 

 it contains much less gypsum ; passing down into a very 

 hard compact concretionary sandstone, — 250 to 300 ft. 



G. — Hard, more or less gritty, yellowish and whitish limestone, 

 containing Productus, Spirifer, Euomphalus, &c. &c, pass- 

 ing down into a light yellow calcareous grit ; altogether 

 50 ft. 



