TY  - RPRT
TI  - Nature and regional significance of unconformities associated with the Middle Ordovician Hagan K-bentonite complex in the North American midcontinent
AU  - Dennis R. Kolata
AU  - W.D. Huff
AU  - Stig M. Bergstrom
PY  - 1998
DO  - 10.1130/0016-7606(1998)110<0723:narsou>2.3.co;2
UR  - https://pubs.usgs.gov/publication/70020784
ID  - 70020784
ER  -