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Coal Measures and Coal Mining in Iowa, including paleontology and a discussion on the coal formation; also the methods of mining by Russell T. Hartman, 1898

Coal Measures and Coal Mining in Iowa by Russell T. Hartman, 1898, Page 16

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15. outline, smooth Spire deviating but slightly if at all, from the same plane. Geological position and locality, Saint Louis Limestone, Spergen Hill, Indiana Reference. - Geology and Natural History of Indiana, 1882, page 321. COELENTERATA ANTHOZOA or ACTINOZOA Tetracorolla Cyathophyllidae Lithostation mamillare Plate I figures 1, 2, 3. Astrea mamilaris, Castelnan, Ten rains Sil. de l'Amerique du Nord 1843. Aximera canadensis, same as above. Acrocyathus floriforme, D'Orbigny, Podrome de Paleontologie, 1850
 
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