نتایج جستجو برای: unconformity

تعداد نتایج: 431  

Journal: :Geology 2023

In the context of continental extension, transient compressional episodes (stress inversion) and phases uplift (depth are commonly recorded with no corresponding change in plate motion. Changes gravitational potential energy during rifting process have been invoked as a possible source stresses, but their magnitude, timing, relationship depth inversions remain unclear. Using high-resolution two...

2015
Susan V. Roberts Douglas W. Burbank

In order to determine the pattern and timing of exhumation and uplift in the Teton Range, fission-track analysis of apatites has been applied to three sections encompassing ~ 2 km of vertical relief along the Teton escarpment. The resulting data provide new insights on the doming of the Precambrian-Cambrian unconformity and on the Teton exhumation/uplift history prior to the Miocene initiation ...

2010
Jeffrey W. Martz William G. Parker

BACKGROUND Recent revisions to the Sonsela Member of the Chinle Formation in Petrified Forest National Park have presented a three-part lithostratigraphic model based on unconventional correlations of sandstone beds. As a vertebrate faunal transition is recorded within this stratigraphic interval, these correlations, and the purported existence of a depositional hiatus (the Tr-4 unconformity) a...

Journal: :International Journal of Earth Sciences 2022

Abstract Although much is known about the Ordovician tectonics of South European Variscides, aspects their geodynamic evolution and palaeogeographic reconstruction remain uncertain. In Sardinia, Variscan tectonic units include significant vestiges evolution, such as a fold system that affected only Cambrian–Lower successions, are cut by regional angular unconformity. A comparison stratigraphy s...

Journal: :The Journal of the Geological Society of Japan 1975

2016
Xinming Wu Dave Hale

Extracting fault, unconformity, and horizon surfaces from a seismic image is useful for interpretation of geologic structures and stratigraphic features. Although others automate the extraction of each type of these surfaces to some extent, it is difficult to automatically interpret a seismic image with all three types of surfaces because they could intersect with each other. For example, horiz...

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