Difference between revisions of "Fold"
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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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+ | 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. |
Revision as of 17:05, 21 July 2015
This page is under construction
Seismic Interpretation of Contractional Fault-Related Folds: An AAPG Seismic Atlas | |
Series | Studies in Geology |
---|---|
Part | Part 1 |
Chapter | Structural Interpretation Methods |
Author | John H. Shaw, Christopher D. Connors, and John Suppe |
Link | Web page |
PDF file (requires access) | |
Store | AAPG Store |
Folds are bends or flexures of layered rock that form in response to motion along faults, diapirism, compaction, and regional subsidence or uplift. Folds are expressed in seismic reflection profiles as one or more regions of dipping reflections (dip domains) that correspond to inclined stratigraphic contacts.
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 hinges; synclinal axial surfaces occupy concave-upward fold hinges.