Proceedings of the Indiana Academy of Science Volume 9-11

Proceedings of the Indiana Academy of Science Volume 9-11

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1900 edition. Excerpt: ...of species of Laniellibranchs. In the lower zone it has no such constant associates. Section along Clifty creek (? 1.12 B): Ft. h. 21--Limestone. Rafinesquina, Lamellibranchiata, Gastropoda, Crin oids 6 21--Limestone and coarse lumpy shale 7 4 20--Shale and limestone. Top, a heavy layer of limestone with conspicuous wave-like markings 21 4 19--Partly covered, but represented by heavy layers of limestone in the bank above IS 11 18--Limestone and shale 14 4 17--Limestone. Rafinesquina (aaa), Hebertella 5 Ft. In. 16--Shale, shaly limestone, some thick layers of limestone. Rafinesquina, Bryozoa, Trilobites, Zygo.pira (aaa) in some layers 40 15--Heavy layer of limestone 6 14--Shale and shaly limestone. Trilobites (al 9 5 13--Limestone. Rafinesquina, Amphus, Calymene, Platyslrophia 8 & 12--Mostly shale 4 10 11--Argillaceous compact layer. Trilobites, Gastropods & 10--Shaly limestone 2 9 9--Limestone and shale. Platyslrophia. Hebertella 3 8--Limestone. P. lynx and laticosta. Hebertella 3 6 7--Covered 10 0--Limestone, more shaly than 5. Hebertella (form with dorsal fold), P. lynx and laticosta 3 5--Same as 4 but P. laticosta more abundant 3 10 4--Thin shaly limestone. Hebertella 1 ( 2 3--Thin shaly limestone. Hebertella, P. laticosta, Monticulipora (aa). 1 2--Thin shaly limestone. P. lynx (aa), laticosta (a), Hebertella occi denlalis (c) Trilobites, Monticulipora 1 1--Covered to river level 45 Total section 198 This section shows some 30 feet more of the Platystrophia beds than the Madison section; otherwise it is the same in the main as the basal part of that section. P. lynx is here abundant in the lower layers and laticosta in the upper layers. From the detailed sections now described of the Ordovician rocks of Indiana it will at more

Product details

  • Paperback
  • 189 x 246 x 12mm | 408g
  • United States
  • English
  • black & white illustrations
  • 1236913256
  • 9781236913258