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NARROW
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Tertiary
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Paleogene
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Hanna Formation (14)
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middle Paleocene (1)
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Multituberculata (3)
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Protista
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Mesozoic
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Upper Cretaceous
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Almond Formation (1)
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Campanian (2)
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Fox Hills Formation (1)
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Frontier Formation (2)
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K-T boundary (2)
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Lance Formation (2)
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Lewis Shale (5)
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Maestrichtian (2)
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Niobrara Formation (1)
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Parkman Sandstone (1)
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Jurassic
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Morrison Formation (1)
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Triassic (3)
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rare earths
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neodymium
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metamorphic rocks
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Rocky Mountains foreland (4)
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Casper Formation (1)
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Tensleep Sandstone (2)
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palynomorphs
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pollen (3)
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paragenesis (1)
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petrology (7)
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Spermatophyta
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Magnetostratigraphy of lower Paleocene strata in the Ferris Formation, Hanna Basin, Wyoming, with refined resolution of the Pu1–Pu2 interval-zone boundary of the Puercan North American Land Mammal Age
Alternative viewpoints on the nature and importance of a prominent syncline at the northeastern edge of Wyoming’s Hanna Basin
A new stratigraphic framework and constraints for the position of the Paleocene–Eocene boundary in the rapidly subsiding Hanna Basin, Wyoming
A new middle Paleocene (early Tiffanian) mammalian fauna from the Overland Member of the Fort Union Formation, Great Divide Basin, Wyoming, U.S.A.
Source to sink sandstone-mudstone proportion and facies distribution across a third-order clastic wedge, Cretaceous Western Interior Seaway
Interactions of A Paleocene River, A Rising Fold, and Early-Diagenetic Concretions
The origin of extensive Neoarchean high-silica batholiths and the nature of intrusive complements to silicic ignimbrites: Insights from the Wyoming batholith, U.S.A.
Estimating snow water equivalent over long mountain transects using snowmobile-mounted ground-penetrating radar
The Rocky Mountain Front, southwestern USA
Is river avulsion style controlled by floodplain morphodynamics?
Interpreting stratigraphic relationships and Laramide structural history of the northeastern margin of the Hanna Basin (Wyoming): Meniscoessus (Mammalia, Multituberculata) exposes its faults
Abstract In sedimetary basins not currently undergoing primary compaction (e.g., Rocky Mountain Basins), p-wave velocities noticeably vary with azimuth, yet the mechanism(s) controlling the anisotropy remain uncertain. Possible geologic causes for azimuthal anisotropy include but are not limited to sedimentary fabrics, steep bedding, changes in local in-situ or residual stress, and open or mineralized fractures. To test these hypotheses, P-wave velocity azimuths (Vfast) from a proprietary seismic survey of a NNW-trending Laramide Anticline on Casper Arch in central Wyoming were compared to image log data from the seismic coverage area and fracture orientations from nearby analog structures.
Natural Fractures and Strain Accommodation in the Tensleep Formation at Beer Mug Anticline
Abstract The Pennsylvanian-age Tensleep Formation in south-central Wyoming is comprised of repeated limestones, sandy limestones, and sandstones. Strata of these varied lithologic units are folded over Beer Mug Anticline and cut by numerous intersecting fractures. The anticline, with a near-vertical forelimb and backlimb dip up to 50 degrees, provides an ideal analog for fracture systems in tightly folded Paleozoic hydrocarbon reservoirs. Fracture type and degree of development vary systematically with lithology, structural position, and degree of folding. Fracturing is most intense towards the core of the anticline, which locally consists of folding. Fracturing is most intense towards the core of the anticline, which locally consists of brecciated, oil-stained rock with large-scale vuggy porosity. Most of these strata exhibit inherited (F0) fracture patterns that predate folding, as well as fold-related extension fractures that trend approximately normal (F1) and parallel (F2) to the axis of folding.