thumbnail

Stratigraphic framework of Lower and Upper Cretaceous rocks in central and eastern Montana

Data Series 57

By:

Links

Abstract

This study shows the lithology, thickness, distribution, and correlation of Lower and Upper Cretaceous rocks in central and eastern Montana. The described stratigraphic units range from the Aptian Kootenai Formation (oldest) to the Maastrichtian Hell Creek Formation (youngest). An included text report describes the units, and most formations or members are also represented by isopach maps. Structure contour maps of three horizons are also included. Correlations across the study area are shown on a series of cross sections. All text and illustrations are included as Adobe PDF files.

Study Area

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Stratigraphic framework of Lower and Upper Cretaceous rocks in central and eastern Montana
Series title:
Data Series
Series number:
57
ISBN:
0607940220
Edition:
Version 1.0.
Year Published:
2000
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
1 computer optical disc :col. ill., col. map ;4 3/4/in. in plastic box 13 x 15 x 1 cm.
Scale:
1