Changes

Balanced sections were first constructed for thrust belts, but Gibbs,<ref name=Gibbs_1983>Gibbs, A. D., 1983, Balanced cross section construction from seismic sections in areas of extensional tectonics: Journal of Structural Geology, v. 5, p. 153-160.</ref> Groshong,<ref name=Groshong_1989a /> and Rowan and Kligfield<ref name=Rowan_etal_1989>Rowan, M. G., and R. Kligfield, 1989, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0008/0950/0955.htm Cross section restoration and balancing as aid to seismic interpretation in extensional terranes]: AAPG Bulletin, v. 73, p. 955-966.</ref> have successfully applied the method to extensional and salt-related structures. Extensional section balancing is more difficult than compressional balancing because of the bed thickness changes that occur across faults. The balancing template has to show these thickness changes accurately. Generally, computer-aided methods are essential because they can sequentially backstrip the section to remove tectonic as well as compaction strains. Examples of these are described by Rowan and Kligfield,<ref name=Rowan_etal_1989 /> Worrall and Snelson,<ref name=Worrall_etal_1989>Worrall D. M., and S. Snelson, 1989, Evolution of the northern Gulf of Mexico with emphasis on Cenozoic growth faulting and the role of salt, in A. W. Bally and A. R. Palmer, The Geology of North America-An Overview: Geological Society of America, v. A, p. 97-138.</ref> and Shultz-Ela and Duncan.<ref>Schultz-Ela, D., and Duncan, K., 1990, Users manual and software for Restore, version 2.0: The Univ. of Texas Bureau of Economic Geology, 75 p.</ref>

Balanced sections were first constructed for thrust belts, but Gibbs,<ref name=Gibbs_1983>Gibbs, A. D., 1983, Balanced cross section construction from seismic sections in areas of extensional tectonics: Journal of Structural Geology, v. 5, p. 153-160.</ref> Groshong,<ref name=Groshong_1989a /> and Rowan and Kligfield<ref name=Rowan_etal_1989>Rowan, M. G., and R. Kligfield, 1989, [http://archives.datapages.com/data/bulletns/1988-89/data/pg/0073/0008/0950/0955.htm Cross section restoration and balancing as aid to seismic interpretation in extensional terranes]: AAPG Bulletin, v. 73, p. 955-966.</ref> have successfully applied the method to extensional and salt-related structures. Extensional section balancing is more difficult than compressional balancing because of the bed thickness changes that occur across faults. The balancing template has to show these thickness changes accurately. Generally, computer-aided methods are essential because they can sequentially backstrip the section to remove tectonic as well as compaction strains. Examples of these are described by Rowan and Kligfield,<ref name=Rowan_etal_1989 /> Worrall and Snelson,<ref name=Worrall_etal_1989>Worrall D. M., and S. Snelson, 1989, Evolution of the northern Gulf of Mexico with emphasis on Cenozoic growth faulting and the role of salt, in A. W. Bally and A. R. Palmer, The Geology of North America-An Overview: Geological Society of America, v. A, p. 97-138.</ref> and Shultz-Ela and Duncan.<ref>Schultz-Ela, D., and Duncan, K., 1990, Users manual and software for Restore, version 2.0: The Univ. of Texas Bureau of Economic Geology, 75 p.</ref>

[[File:Drive-mechanisms-and-recovery fig2.png|thumbnail|left|'''Figure 5.''' Example of a balanced section through a complex thrust ramp structure showing both the deformed and undeformed sections.<ref name=Mitra_1986>Mitra, S., 1986, Duplex structures and imbricate thrust systems-Geometry, structural position, and hydrocarbon potential: AAPG Bulletin, v. 70, p. 1087-1112.</ref>]]

[[File:Drive-mechanisms-and-recovery fig2.png|thumbnail|left|'''Figure 5.''' Example of a balanced section through a complex thrust ramp structure showing both the deformed and undeformed sections.<ref name=Mitra_1986>Mitra, S., 1986, [http://archives.datapages.com/data/bulletns/1986-87/data/pg/0070/0009/1050/1087.htm Duplex structures and imbricate thrust systems-Geometry, structural position, and hydrocarbon potential]: AAPG Bulletin, v. 70, p. 1087-1112.</ref>]]

==Map construction==

==Map construction==