About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Stratigraphic Analysis of the Navajo Sandstone
William E. Freeman (2), Glenn S. Visher
ABSTRACT
The Navajo Sandstone (Upper Triassic(?)-Lower Jurassic) has beeninterpreted as desert-eolian in origin principally based upon "eolian type" cross-bedding; well-rounded, well-sorted, and frosted grains; and lack of fossil evidence. Reevaluation of these criteria reveals that they are ambiguous, non-diagnostic, and insufficient tosubstantiate an eolian interpretation.
It was found that comparisons of log-probability curve shapes of samples from Navajo and modern tidal-current environments show they were deposited by similar processes. The Navajo possesses sedimentary structures, such as current lineation, bioturbation, andlarge-scale contorted bedding characteristic of subaqueous conditions of deposition. Pelletal glauconite occurs in a correlate of the Navajo, the Nugget Formation of the Wind River basin, indicative of a marine environment. Vertical sequence and facies patterns of the Glen Canyon Group and Carmel Formation suggest a transgression of Navajo and Carmel marine deposits eastward from the Cordilleran geosyncline onto continental deposits of the Kayenta, Moenave, Wingate, and Chinle Formations.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
Watermarked PDF Document: $14 | |
Open PDF Document: $24 |