On to cover: Global exploration potential, boosted by rising oil prices throughout the past year, kept geologists busy looking for the next big discovery -- wherever that may be. For example, consider our cover photo, taken in north Oman and featuring outcrops of the Cenomanian/Turonian carbonate petroleum system, which contain both the hydrocarbon reservoirs and source rocks in the entire gulf area and southern Mediterranean region. This region, which offers outcrop correlations to two nearby producing oil fields (Natih and Fahud), will be toured in an AAPG field trip, "The Natih Carbonate Petroleum System, North Oman," set March 31-April 3, held in conjunction with GEO/2000. Photo by Franz van Buchem. The inset photo shows a golden view of Istanbul, Turkey, site of the inaugural AAPG regional international conference July 9-12.