Bibframe Instance
TitleAmerica's petroleum industries pour out fuel and lubricants for the United Nations. Oil deposits below swamp lands in the southern U.S. state of Louisiana are detected by a device installed in boats manned by oil geologists. Small explosions are set off in rock formations underlying the swamp. The subterranean echo those blasts cause as their sound travels downward into the earth and rebounds from certain rock and earth stratas often betrays the presence of oil by the lapse of time between explosion and echo. In the U.S. oil is sought at the tops of mountains, under farmlands and deserts, on the seacoast and under the sea, as well as under swamplands. The efficiency of oil company geologists in detecting oil deposits under in out-of-the-way places has contributed to the vast resources of the American petroleum industry in meeting the demands of modern warfareNoteAdditional information from caption on print in lot: Approved by appropriate U.S. authority.Portrait of America series; no. 83.Title and other information from print in lot and lot catalog card.More information about the FSA/OWI Collection is available atCould not render: bf:electronicLocatorDimensions5 x 7 inches or smaller.Extent1 negativeProvision ActivityPublication: United States 1944 Publication: 1944? Acquisition SourceDLC Stock Number:LC-USW4-029563 (b&w film neg.) 