The Geochronology and Stratigraphic Evolution of Neogene Sedimentary Rocks in Jackson Hole, Wyoming

The Miocene sediments of the Jackson Hole area constitute a unique sequence of terrestrial sediments. While much of the surrounding terrain was undergoing denudation during the Miocene, over 4000 m of volcaniclastic, lacustrine, and fluvial sediments accumulated in the vicinity of Jackson Hole. Recently completed paleontological and palynological studies have served to delineate complex biostratigraphic and climatic histories. The present research project has several goals. Chronologies are being developed for the Miocene sediments through the use of magnetic-polarity stratigraphies and fission-track dating. Sedimentation histories are being studied by combining lithologic data with chronologic information.

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Chronology of Neogene Sedimentary Rocks in Jackson Hole, Wyoming

The UW National Parks Service Research Station Annual Reports ◽

10.13001/uwnpsrc.1983.2371 ◽

1983 ◽

Vol 7 ◽

pp. 43-44

Author(s):

Douglas Burbank

Keyword(s):

Climatic Change ◽

Fission Track ◽

Sedimentary Rocks ◽

Unique Sequence ◽

Pollen Record ◽

Fluvial Sediments ◽

Fission Track Dating ◽

Hole Area ◽

Terrestrial Sediments ◽

Jackson Hole

The Miocene sediments of the Jackson Hole area constitute a unique sequence of terrestrial sediments. While much of the surrounding terrain was undergoing denudation during the Miocene, over 4000 m of volcaniclastic, lacustrine, and fluvial sediments accumulated in the vicinity of Jackson Hole. Recently completed paleontological and palynological studies have served to delineate complex biostratigraphic and climatic histories. The present research project is using magnetostratigraphy, fission-track dating, and K-Ar dating to develop a chronology for the Miocene sediments. This chronology will permit the paleontological data to be examined in a precise temporal framework. Similarly, the rates and timing of climatic change as inferred from the pollen record will be constrained through these magnetostratigraphy studies.

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Fold-thrust deformations of the isl. New Siberia (Novosibirsky islands, Russia): age, morphology and genesis of structures

Геотектоника ◽

10.31857/s0016-853x2019646-64 ◽

2019 ◽

pp. 46-64 ◽

Cited By ~ 1

Author(s):

B. G. Golionko ◽

A. E. Basilyan ◽

P. A. Nikolsky ◽

V. V. Kostyleva ◽

N. A. Malyshev ◽

...

Keyword(s):

Deformation Process ◽

Fission Track ◽

Sedimentary Rocks ◽

Structural Evolution ◽

Pleistocene Glaciation ◽

Structural Studies ◽

Fission Track Dating ◽

Upper Neopleistocene ◽

Joint Deformation ◽

Folded Structures

Abstract Detailed lithologic, stratigraphic and structural studies of fold-thrust structures were conducted on the island New Siberia. We have established, the jointly deformed complexes of the Upper CretaceousMiddle Neopleistocene are overlapped by undeformed sediments of the Upper Neopleistocene. This fact confirms the completion of the deformation process at the end of the Middle Neopleistocene. An additional argument excluding the ancient age of dislocations is the result of the fission track dating for apatites. The resulting track ages of apatites significantly exceeded the age of deformed rocks, which was reliably established by the other methods. In deformed complexes, unlithified permafrost rocks predominate. Folded structures are characterized by joint deformation of sedimentary rocks, formation ice and ice-ground, inconsistency of fold orientation and different direction of structural evolution in the northern and southern parts of the island New Siberia. Considering the correspondence of the established age of dislocations to the age of the largest Pleistocene glaciation, all these facts allow us to state that the fold-thrust deformations of the island New Siberia are glaciodislocations.

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