TY - RPRT TI - Documenting mudstone heterogeneity by use of principal component analysis of X-ray diffraction and portable X-ray fluorescence data: A case study in the Triassic Shublik Formation, Alaska North Slope AU - Adam Boehlke AU - Katherine J. Whidden AU - William Benzel PY - 2017 UR - https://pubs.usgs.gov/publication/70193221 ID - 70193221 ER -