Geochemical variation in a copper-bearing redbed sequence of the Ravalli Group (Belt Supergroup), northwestern Montana and northern Idaho
By: by Jon J. Connor ; with analytical contributions from A.J. Bartel ... [et al.].
Contributors: Bartel, Ardith J.; Geological Survey (U.S.)
Series: Open-file report -- 91-0028 A, 91-0028 B.; U.S. Geological Survey open-file report -- 91-28-A,B.
Publisher: U.S. Geological Survey; Books and Open-File Reports Section [distributor]
Published: 1991
Place of publication: Denver, Colo
Language: eng
Format: Microform
Subjects: Geochemistry -- Montana -- Computer programs.; Geochemistry -- Idaho -- Computer programs.; Copper ores -- Idaho -- Computer disks.; Copper ores -- Montana -- Computer disks.
Other titles: Geochemical variation, Ravalli Group redbeds NW Montana & N Idaho.
Notes: Cover title.

Distributed to depository libraries in microfiche.

Shipping list no.: 92-0531-M.

Imprint and distribution information from transmittal sheet.

Title on disk label: Geochemical variation, Ravalli Group redbeds NW Montana & N Idaho.

Computer disk contains 22 files.

Information on diskette not included in microfiche reproduction.

Microfiche. [Denver, Colo. : U.S. Geological Survey, 1991?] 1 microfiche : negative. 
Table of contents: title: 91-0028A. Geological interpretation (paper copy); title: 91-0028B. Geochemical data files, ASCII, (1) 5 1/4" 360K floppy diskette.