Changes

[[File:ST53Part01Pg13.jpg|thumb|300px|{{figure number|5}}]]

[[File:ST53Part01Pg13.jpg|thumb|300px|{{figure number|5}}]]

The seismic section [[:file:ST53Part01Pg13.jpg|Figure 5, left]] shows a narrowing upward fold limb, or growth triangle, where bed dips within the fold limb generally do not shallow upward, consistent with folding by kink-band migration. Dipmeter data in the wells corroborates the reflector dips. In the section in [[:file:ST53Part01Pg13.jpg|Figure 5, top right]], a fanning and upward shallowing of limb dips within growth strata are consistent with folding by progressive limb rotation. The core of the anticline is filled with salt, which presumably thickened during [[deformation]], leading to progressive rotation of the overlying fold limbs. The growth structure in the section in [[:file:ST53Part01Pg13.jpg|Figure 5, lower right]] contains both a growth triangle and a fanning of limb dips, suggesting folding by a combination of kink-band migration and limb rotation mechanisms. Kinematic theories that employ hybrid folding mechanisms include shear fault-bend folds,<ref name=Suppeetal_2004>Suppe, J., C. Connors, and Y. Zhang, 2004, [http://archives.datapages.com/data/specpubs/memoir82/CHAPTER16/CHAPTER16.HTM Shear fault-bend folding], ''in'' K. R. McClay, ed., Thrust tectonics and hydrocarbon systems: [http://archives.datapages.com/data/alt-browse/aapg-special-volumes/m82.htm AAPG Memoir 82], p. 303-323.</ref> certain classes of detachment folds,<ref name=Dahlstrom_1990 /><ref name=Hardyandpoblet_1994 /> and trishear fault-propagation folds.<ref name=Ersley_1991>Ersley, E. A., 1991, [http://geology.gsapubs.org/content/19/6/617.abstract Trishear fault-propagation folding]: Geology, v. 19, no. 6, p. 617-620.</ref><ref name=Hardyandford_1997>Hardy, S., and M. Ford, 1997, [http://onlinelibrary.wiley.com/doi/10.1029/97TC01171/full Numerical modeling of trishear fault-propagation folding and associated growth strata]: Tectonics, v. 16, no. 5, p. 841-854.</ref><ref name=Allmendinger_1998>Allmendinger, R. W., 1998, [http://onlinelibrary.wiley.com/doi/10.1029/98TC01907/full Inverse and forward numerical modeling of trishear fault-propagation folds]: Tectonics, v. 17, no. 4, p. 640-656.</ref>

The seismic section [[:file:ST53Part01Pg13.jpg|Figure 5, left]] shows a narrowing upward fold limb, or growth triangle, where bed dips within the fold limb generally do not shallow upward, consistent with folding by kink-band migration. [[Dipmeter]] data in the wells corroborates the reflector dips. In the section in [[:file:ST53Part01Pg13.jpg|Figure 5, top right]], a fanning and upward shallowing of limb dips within growth strata are consistent with folding by progressive limb rotation. The core of the anticline is filled with salt, which presumably thickened during [[deformation]], leading to progressive rotation of the overlying fold limbs. The growth structure in the section in [[:file:ST53Part01Pg13.jpg|Figure 5, lower right]] contains both a growth triangle and a fanning of limb dips, suggesting folding by a combination of kink-band migration and limb rotation mechanisms. Kinematic theories that employ hybrid folding mechanisms include shear fault-bend folds,<ref name=Suppeetal_2004>Suppe, J., C. Connors, and Y. Zhang, 2004, [http://archives.datapages.com/data/specpubs/memoir82/CHAPTER16/CHAPTER16.HTM Shear fault-bend folding], ''in'' K. R. McClay, ed., Thrust tectonics and hydrocarbon systems: [http://archives.datapages.com/data/alt-browse/aapg-special-volumes/m82.htm AAPG Memoir 82], p. 303-323.</ref> certain classes of detachment folds,<ref name=Dahlstrom_1990 /><ref name=Hardyandpoblet_1994 /> and trishear fault-propagation folds.<ref name=Ersley_1991>Ersley, E. A., 1991, [http://geology.gsapubs.org/content/19/6/617.abstract Trishear fault-propagation folding]: Geology, v. 19, no. 6, p. 617-620.</ref><ref name=Hardyandford_1997>Hardy, S., and M. Ford, 1997, [http://onlinelibrary.wiley.com/doi/10.1029/97TC01171/full Numerical modeling of trishear fault-propagation folding and associated growth strata]: Tectonics, v. 16, no. 5, p. 841-854.</ref><ref name=Allmendinger_1998>Allmendinger, R. W., 1998, [http://onlinelibrary.wiley.com/doi/10.1029/98TC01907/full Inverse and forward numerical modeling of trishear fault-propagation folds]: Tectonics, v. 17, no. 4, p. 640-656.</ref>

==Distinguishing drape from growth strata==

==Distinguishing drape from growth strata==