TY  - RPRT
TI  - Ferricrete, manganocrete, and bog iron occurrences with selected sedge bogs and active iron bogs and springs in the upper Animas River watershed, San Juan County, Colorado
AU  - Douglas B. Yager
AU  - Stan E. Church
AU  - Philip L. Verplanck
AU  - Laurie Wirt
PY  - 2003
DO  - 10.3133/mf2406
UR  - https://pubs.usgs.gov/publication/mf2406
ID  - mf2406
ER  -