Authors:

Natural gamma-ray logging is the most versatile downhole geophysical method available for use in glacial and related terrain. Log profiles illustrate lithologic variation. They illustrate vertical sequences of glacigenic deposition as well as regionally recognizable till-statigraphic units. Expanded log profiles run at very slow speeds can illustrate cyclic variations in thick loess and in soil and soil-landscape relations. Recognition of depositional-sequence packages can provide an ultimate basis for a natural “genetic stratigraphic classification, a classification emphasizing whole events at all scales. Such log-based packages can provide the framework and the predictive models necessary for both regional and site-specific applications. These models can provide an objective understanding of variation that is critical to both engineering and hydrogeologic concerns.



Bleuer, N. K., 2004, Slow-logging subtle sequences–the gamma-ray log character of glacigenic and other unconsolidated sedimentary systems: Indiana Geological Survey Special Report 65, 39 p., 27 figs., 2 tables, 2 app.


You may also like:

Keywords: gamma logging, downhole geophysical, stratigraphy, unconsolidated, glacial

Can't find what you're looking for? Feel free to contact us directly:

Indiana Geological and Water Survey
420 N. Walnut St.
Bloomington, IN 47404
812-855-7636 (phone)
812-855-2862 (fax)
IGWSinfo@indiana.edu

IGS Return Policy

  • Original sales receipt required.
  • Returns accepted within 30 days of purchase date.
  • Refund will be issued by the same method of payment as purchased.
  • Products must be returned in the same new condition as purchased.
  • Refunds on custom orders and digital products are NOT allowed.
  • Customers are responsible for paying shipping costs to return products.

Updated 8/19/2020