• 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 174

More information
  • digital collection
  • archival collection guide
  • transcription tips
 
Saving...
[page]173[/page] peat was the thickest, say at the section and figure 1; hence the form of the bed of coal would be meniscus shaped, as shown diagramatically in figure 2. [image: drawing of side of flat and convex coal seam] [caption]Figure 2.[/caption] The coal beds are thickest at the middle, follow the irregularities of the floor upon which they were formed and gradually thin out toward the sides. Two or more beds may join as shown in figure 3. [image: drawing of an up and down coal seam which is thinner in some of the up locations: label A] [caption]Figure 3.[/caption] Such a case as this, however, is merely a case of an uneven floor: the place marked A being a shallow place in the marsh.
 
Scholarship at Iowa