Correlation between abnormal pore pressure and tectonic jointing in the Devonian Catskill Delta

James Terry Engelder, Gerhard Oertel

Research output: Contribution to journalArticle

36 Scopus citations

Abstract

Using the preferred orientation of chlorite, we measured vertical compaction in 53 samples from the Devonian Catskill Delta in central New York State. The marine part of this delta contains three levels based on different amounts of vertical compaction. These levels correspond roughly to (1) black shales at the base, (2) prodelta turbidites, and (3) a cap of shallow-water sediments including abundant storm-washed shell hashes deposited within the wave base. The cap is normally compacted, whereas the lower two levels are undercompacted. Tectonic (cross-fold) joints that propagated during the late Paleozoic Alleghanian orogeny are restricted to the deeper, undercompacted levels of the Catskill Delta, whereas unloading (cross-fold) joints pervade the cap. The correlation between undercompaction and the distribution of tectonic joints indicates that abnormal fluid pressure was a key mechanism during the propagation of these joints.

Original languageEnglish (US)
Pages (from-to)863-866
Number of pages4
JournalGeology
Volume13
Issue number12
DOIs
StatePublished - Jan 1 1985

All Science Journal Classification (ASJC) codes

  • Geology

Fingerprint Dive into the research topics of 'Correlation between abnormal pore pressure and tectonic jointing in the Devonian Catskill Delta'. Together they form a unique fingerprint.

  • Cite this