Stratigraphy, Petrology, Diagenesis, Paleontology, and Depositional Environments of the Harrisburg Member of the Kaibab Formation in Northern Arizona and Southern Utah

<p>The Kaibab Formation has two members, the Fossil Mountain Member below and the Harrisburg Member above. They were deposited in shallow-marine shelf to restricted coastal settings. Stratigraphically above are the Rock Canyon Conglomerate and the Moenkopi Formation; consisting of the Timpoweap and Lower Red members; which are the only members present in the study area. The Rock Canyon Conglomerate was deposited in depressions and as a regolith. The Timpoweap and Lower Red members were deposited in shallow marine to tidal environments.</p> <p>Nine stratigraphic units were identified in the Harrisburg Member. Units one, two, three, five, six, seven, and nine are cherty dolostones. Unit four is a siltstone and unit eight is interpreted to be dolostone. The Rock Canyon Conglomerate, Timpoweap member, and Lower Red member each are composed of one unit.</p> <p>Fossils present in units five and seven include: nautiloids, gastropods, sponges, bivalves, lophophorates, and trilobites. Fossils are preserved by rust-red silica. The interior of the fossils are composed of drusy silica or dolomudstone.</p> <p>Fourth order sequences are present. Sequence one consists of the Fossil Mountain Member; units one, two, and three representing a highstand to falling stage systems tract. The top of unit three was subaerially exposed during a lowstand systems tract creating sequence boundary one. Sequence two consists of units four through nine which represent a transgressive stems tract. The Permian-Triassic unconformity above the Harrisburg Member represents a forced regression and sequence boundary two.</p> <p>Sequence three consists of the Rock Canyon Conglomerate and the Moenkopi Formation. The Rock Canyon Conglomerate represents a lowstand systems tract, and the Moenkopi Formation represents a transgressive systems tract.</p>

Name thesis:degree_name

Master of Science - Geology

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Geology

Year dc:date.available

2020

Author dc:creator

• Case, Zachery T.

Contributors dc:contributor

• Dr. R. LaRell Nielson
• Dr. Michael Read
• Dr. Melinda Faulkner

• Kaibab Formation
• Harrisburg Member
• stratigraphy
• sequence stratigraphy
• petrology
• paleontology
• nautiloids
• Geology

Repository record dc:identifier

https://scholarworks.sfasu.edu/etds/380

OAI identifier oai:identifier

oai:scholarworks.sfasu.edu:etds-1384