The Louisiana Gulf Coast District consists of the 38 southern parishes and 16 offshore continental shelf areas. Oil and gas are produced from Cretaceous to Pleistocene strata. There were 2,421 development and exploratory wells drilled in 1963, 8.2 percent more than in 1962. Of the 749 exploratory wells, 15.6 percent were successful. The 43 new-field discoveries (26 onshore and 17 offshore) are located on a map and their structures are briefly described. The most important of the 143 new pools and extensions include Little Pecan Lake and Kings Bayou, Cameron Parish, and Block 14 field, Vermilion area. Geophysical activity showed a decrease onshore but increased offshore. Both oil and gas production increased, maintaining Louisiana in second place in the nation's annual production.