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AL S RVEY PUBLI ATI NS <br /> oal Investi ations Ma are geolog C maps on t pographic o <br /> etric bases tvarious cales show ng bedrock or surfici <br /> strati ra and stru tura] relatio s in certain oal-resourc <br /> it and Gas Investigati ns Charts s ow strati gra hie informa <br /> r certain oil and gas fie ds and oth r areas havi g petroleu <br /> al. <br /> iseellaneo Field St dies Maps are multico or or black <br /> ite maps on topographic or planime 'c bases on uadrangle o <br /> areas at v ips show be rock geolog <br /> on to sped )osit proble s; post-197 <br /> prvnan y ac -an - bite maps o various su jects suc a <br /> mental stud es or wilde ess mineral investigatio S. <br /> ydrologic nvestigatio Atlases multicolo or black <br /> ite maps on topographic or planimet c bases pres nting a wid <br /> al scale is 1. 24,000,and regional stu ies are at 1; 0,000 scat <br /> ler. <br /> ermanent c tatogs, as w ❑ as some thers, givin comprehen <br /> zings of U.S Geological urvey publi ations are a ailable unde <br /> editions in sated belo from the U.S. Geolo ical Survey <br />