showing interlayered coals and sandstones 6 3. Map showing national wildlife refuges in Alaska 10 4. Photograph of NPS geologist collecting mineralized rock samples in Kantishna area of Denali National Park and Preserve 11 5-7. Maps showing: 5. Locations of exploratory oil wells, oil and gas fields, and possible petroleumbearing onshore sedimentary basins 13 6. Areas of oil and gas lease sales 17 7. Offshore geologic province boundaries as defined by MMS and USGS for national assessment and location of joint MMS-State studies 21 Contents VII