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| | isbn = 0891810609 | | | isbn = 0891810609 |
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| + | [[File:ST53_Part01_Pg03A.jpg|thumb|300px]] |
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| + | Folds are bends or flexures of layered rock that form in response to motion along [[fault]]s, [[diapirism]], [[compaction]], and regional subsidence or [[uplift]]. Folds are expressed in [[seismic reflection profile]]s as one or more regions of dipping reflections ([[dip]] domains) that correspond to inclined [[stratigraphic]] contacts. |
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| + | [[File:ST53_Part01_Pg03B.jpg|thumb|300px]] |
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| + | Dip domains are separated by [[axial]] surfaces; imaginary planes which, when viewed in two dimensions, form axial traces. [[Anticlinal]] axial surfaces occupy concave-downward [[fold hinge]]s; [[synclinal]] axial surfaces occupy concave-upward fold hinges. |