• Transcribe
  • Translate

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 69

More information
  • digital collection
  • archival collection guide
  • transcription tips
 
Saving...
[[pagenumber]]68.[[/pagenumber]] angles of divergence of branches sixty to one hundred degrees. Colony composed of minutes round, tapering tubes which proceed from the axis obliquely upward and outward. Interspaces between rows of cells about the width of cells, cells arranged in helicoidal rows. In well preserved specimens the cells appear rhomboidal but in worm specimens this section is circular or oval. Diameter of cells about one eightieth of an inch. Diameter of fossil one tenth to one fifth of an inch. Geol. Pos. and Loc. -- Missouri Stage of Coal Measure in Iowa, Illinois, Missouri, Kansas, and Nebraska.
 
Scholarship at Iowa