Exhibit 4.3 SUPPLEMENTAL INDENTURE SUPPLEMENTAL INDENTURE (this Supplemental Indenture) dated as of February 25, 1998, between the undersigned Subsidiary Guarantors(individually, the "Subsidiary Guarantor"), a subsidiary of Belco Oil & Gas Corp. (or...Supplemental Indenture • March 26th, 1998 • Belco Oil & Gas Corp • Crude petroleum & natural gas • New York
EXHIBIT 10.16 SECOND AMENDMENT AND CONSENT, dated as of February 25, 1998 (this "Amendment"), to the CREDIT AGREEMENT, dated as of September 23, 1997, as amended by the First Amendment and Waiver thereto, dated as of November 25, 1997 (as the same may...Credit Agreement • March 26th, 1998 • Belco Oil & Gas Corp • Crude petroleum & natural gas • New York
RECITALSSecond Supplemental Indenture • March 26th, 1998 • Belco Oil & Gas Corp • Crude petroleum & natural gas • New York
Exhibit 4.8 THIRD SUPPLEMENTAL INDENTURE This Third Supplemental Indenture (the "Third Supplemental Indenture"), dated as of February 25, 1998, is made and entered into by and between Belco Oil & Gas Corp., a Nevada corporation ("Belco"), the...Third Supplemental Indenture • March 26th, 1998 • Belco Oil & Gas Corp • Crude petroleum & natural gas • New York
