TY - RPRT TI - Geologic setting of the Glacier Peak and Mazama ash-bed markers in west-central Montana AU - Richard Walter Lemke AU - M. R. Mudge AU - R.E. Wilcox AU - H. A. Powers PY - 1975 DO - 10.3133/b1395h UR - https://pubs.usgs.gov/publication/b1395H ID - b1395H ER -