Bulletin 429 Plate III, original caption: Anse La Butte Oil Field, looking northwest. The swamp underneath which the solid rock-salt dome is located may be seen at the extreme left; the low "butte" lies immediately beyond, hidden by foliage; the curved outline of the depression, the cove, the " anse " and the slight elevation, the " butte," gave the field its name. Most of the successful wells are located centrally in the group of derricks shown. An "air plant," the Lafayette and Baton Rouge branch of the Southern Pacific Railroad, and loading racks can be seen at the right.