• 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 54

More information
  • digital collection
  • archival collection guide
  • transcription tips
 
Saving...
[page]53.[/page] two of their diameters apart. In some instances, however, they are not at all separated. When separated they communicate with each other by means of horizontal tubes. When not separated mural pores answer the purpose. Diameter of corallites one sixteenth to one twelfth inch. Walls thick wrinkled. Interior of corallites divided by irregular tabular into vescicles of varying sizes. Geol. Pos. -- Upper Coal Measures. Localities. -- Montgomery County, Iowa, and in Nebraska and Illinois. Reference. -- Final Rept. U.S. Geol. Survey of Nebraska. [underlined][underlined]Chaetetidae[/underlined][/underlined] Massive corals composed of tubular or polygonal corals. Walls closely joined imperforate.
 
Scholarship at Iowa