Marshall County Sec. 16, T. 4 S., R. 7 E

One mile north of Bull Rapids, NE 1/4 secT. 16 Measured By M.K. Elias, 1932 Remarks II-6
	Unit No. Description Thickness   Threemile limestone member   45 Limestone with three broad bands of flint. Fenestella and other bryozoa, Phillipsia 5 ft. 44 Shale, calcareous, with crinoid joints 0.5 ft.   Speiser shale formation   43 Covered 8 ft. 42 Shale, green 1 ft. 41 Shale, purple 3 ft. 40 Shale, green 0.2 ft. 39 Shale, purple 1.5 ft. 38 Shale, green 0.2 ft. 37 Shale, red 1 ft. 36 Shale, green 0.5 ft. 35 Limestone, light-gray, crystalline 1 ft. 34 Shale, green 0.8 ft. 33 Shale, dark-purple 1.2 ft. 32 Mudstone, light-green, bedded 0.8 ft. 31 Shale, green 0.5 ft. 30 Shale, purple 1 ft. 29 Shale, green 0.5 ft.   Funston limestone member   28 Limestone, massive, breaks into large blocks, shows some stratification, contains poor and small fossils, among which are small plump gastropods (Funston limestone) 3.5 ft.   Blue Rapids shale member   27 Shale, gray 1.5 ft. 26 Shale, almost black, splittery 2 ft. 25 Shale, gray 1 ft. 24 Shale, very fossiliferous 1.5 ft. 23 Limestone, light-gray, fossiliferous 0.8 ft. 22 Shale, light-green 5 ft. 21 Shale, maroon 0.5 ft. 20 Shale, green 0.5 ft. 19 Shale, maroon 1.3 ft. 18 Shale, light-greenish-gray 0.7 ft. 17 Shale, bands of dark-purple and dark green 3 ft. 16 Mudstone, cavernous, green, with some blue-green glauconite in caverns 1 ft. 15 Shale, gray 1 ft. 14 Shale, gray, platy 2 ft.   Crouse limestone member   13 Mudstone, green, platy with vertical veinlets of crystalline calcite 1.5 ft. 12 Limestone, granular, fossiliferous, with thin veinlets of calcite 1 ft. 11 Shale, gray, fossiliferous at the base 3 ft. 10 Limestone, fossiliferous, common Pseudomonotis near the base 2.5 ft.   Easly Creek shale formation   9 Shale, green 5 ft. 8 Shale, red, with a few thin green bands 11 ft. 7 Gypsum leached out at the exposure, in the mine 7-8 ft.   Middleburg limestone member   6 Limestone with Pseudomonotis, Aviculopecten, Septopora, Allorisma, Juresania nebrascensis 3 ft. 5 Limestone, impure and platy near the top; same fauna as listed above in the upper half; Pseudomonotis and other pelecypods in the lower half 3 ft. 4 Shale, gray, solid 5 ft. 3 Shale, red 3 ft. 2 Shale, green 1 ft. 1 Shale, red 2.5 ft.
Original Document Download an archival scan (file is 4-5 megs in size). View PDF version The Archive file you download contains a TIFF image compressed into a ZIP archive. Your browser may be already set up to decompress these files. Commercial software to perform this is available from PKWARE, Inc., the company that invented the format. A web page from a group of people creating shareware or public domain software is available at Info-ZIP. The TIFFs are 150-dpi archival-quality color scans of the original forms and can be viewed by software like Corel PhotoPaint or Adobe PhotoShop. To read the PDF version, you will need the Acrobat PDF Reader, available free from Adobe.