TY  - RPRT
TI  - An early middle ordovician age for collapse breccias in the east Tennessee zinc districts as indicated by compaction and porosity features
AU  - W. T. Hill
AU  - H. Wedow
PY  - 1971
DO  - 10.2113/gsecongeo.66.5.725
UR  - https://pubs.usgs.gov/publication/70207135
ID  - 70207135
ER  -