Browsing Reports of Progress - Indiana Geol. Survey by Subject "Allegheny Series"

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  • Friedman, Samuel A. (Indiana Geological Survey, 1960-12)
    Data from coal-test boreholes and outcrops show that channel-fill sandstones occur at 32 localities in western Indiana in the Brazil, Staunton, Linton, Petersburg, and Dugger Formations of middle Pennsylvanian age. These ...
  • Guennel, Gottfried K. (Indiana Geological Survey, 1952)
    In this report the significance of spores in plant life cycles is discussed briefly. The term “miospore” is proposed for fossil spores and spore-like bodies under 200 micra in size. Sampling and coal preparation are outlined, ...

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