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Showing 1 to 20 of 25 for “"deadwood"”.
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Stratigraphy of the Winnipeg and Deadwood Formations in North Dakota
<p>The Deadwood formation includes all of the pre-Winnipeg sedimentary rocks of North Dakota which range in thickness from an erosional edge in the subsurface of northeastern North Dakota to at least 1,000 feet in northwestern North Dakota. It is composed of sandstone, shale, and carbonate of Late …
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Reservoir characterization of the Deadwood formation western North Dakota, Williston Basin
… the past few decades, the Cambro-Ordovician-aged Deadwood Formation in the Williston Basin was studied by many researchers for oil and gas exploration and alternative energy production. The previous Deadwood Formation published literature documents surface and subsurface research, with the only …
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Deadwood Dynamics: A Case Study at Prince William Forest Park, Virginia
Deadwood, characterized as both downed woody material (DWM) and standing and dead stems, i.e., snags, is a significant component of terrestrial forest ecosystems. Deadwood amount and structure may influence potential wildfire hazard by altering combustible DWM mass and creating fuel structures that …
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Stratigraphy and Depositional History of the Deadwood Formation (Upper Cambrian and Lower Ordovician), Williston Basin, North Dakota
<p>Based on gamma-ray characteristics, the Deadwood Formation is divided into six informal, attribute-defined units, members A through F. Members A and Bare Late Cambrian in age; members C through Fare Early Ordovician in age. The type section of the Deadwood, in the northern Black Hills, is …
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Interspecific wood trait variation predicts decreased carbon residence time in changing forests
… in aboveground carbon (C) from live trees to deadwood, concurrent with compositional shifts. While interspecific decay variation is widely reported, the implications of forest compositional change on ecosystem-level deadwood decay and consequently, the future of a globally significant C pool …
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Stratigraphy, Sedimentology, and Ichnology of the Middle Cambrian to Lower Ordovician Deposits in Subsurface Western Canada
… Unit (BSU), the Earlie Formation, and the Deadwood Formation. Numerous wells have been drilled through these units since the 1950s, however, just a group of these wells present relatively continuous core recovery available for analyses. The Basal Sandstone Unit is characterized by …
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Structural Evolution of the Beaver Lodge Portion of the Nesson Anticline, North Dakota
… North Dakota, has been determined from Cambrian (Deadwood) through Late Cretaceous (Greenhorn) time. Detailed structural data defines two areas of structural closure occurring along a basement structural trend. One of these is the site of a Precambrian topographic high. Detailed isopachous data …
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Depositional environments and history of the Winnipeg Group (Ordovician), Williston Basin, North Dakota
… the Winnipeg is unconformably underlain by the Deadwood Formation (Upper Cambrian-Lower Ordovician) and conformably overlain by the Red River Formation (Upper Ordovician).</p> <p>The strata of the lower member of the Black Island Formation consist of a red-bed lithofacies, containing reddish …
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The Effects of Environmental Complexity on Community Structure in Woodland Centipedes
Woodland centipedes occur in both log/fallen deadwood and leaf-litter microhabitats in temperate forests. The variation in centipede diversity among similar sites in the Great Smoky Mountains National Park of eastern Tennessee and the Nantahala National Forest of western North Carolina is related …
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Depositional environments and paleogeography of the Winnipeg Group (Ordovician), Williston Basin, North Dakota
… (Upper Ordovician) unconformably overlies the Deadwood Formation (Cambrian - Lower Ordovician) over most of North Dakota, except in the extreme eastern part, where it lies directly on Precambrian basement rocks. The Winnipeg is conformably overlain by the Red River Formation (Upper Ordovician). …
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The Assessment of habitat condition and consevation status of lowland British woodlands using earth observation techniques.
… flora), evidence of natural turnover (e.g. deadwood and tree regeneration), andanthropogenic influences (e.g.disturbance, damage). Woodland condition assessments are currently conducted via fieldwork, which is hampered by cost, spatial coverage, objectiveness and repeatability.This …
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Carbon Pools, Dynamics and Budget of the Bruce Peninsula
… in aboveground biomass, soil, roots, litter, and deadwood pools, 2) understand how the carbon moves between these pools and 3) estimate the annual rate of change of the soil carbon budget. Using a LICOR LI8100, measuring soil respiration at 15-minute intervals over the course of two years, the …
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Exploring the relationship between restored ecosystem function and species composition: a meta-analysis
… between biotic component as well as litter and deadwood production, showed little association with species composition, with levels of ecosystem functioning showing little change as species composition became closer to reference sites. Variables relating to nutrients, soil attributes, and biotic …
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Carbon cycle changes during the end-Marjuman (Cambrian) extinction in the Southern Appalachians
… a limited amount of carbon isotope data from the Deadwood Formation in the Black Hills of South Dakota suggests the possibility of a small negative ẟ¹³C excursion near the extinction and preceding the SPICE. Previous high-resolution biostratigraphy has identified an expanded record of extinction …
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Are Weevils Picky Eaters? Community Structure and Host Specificity of Neotropical Saproxylic Beetles (Coleoptera: Curculionidae)
… major role in forest nutrient cycling and making deadwood accessible to other decomposers. Understanding beetle host preferences and patterns of community assembly is critical for their conservation, and for predicting which species might become invasive. This project aims to investigate the …
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Casino Patrons' Reactance to Smoke-free Policies
… of gamblers who visited gaming facilities in Deadwood, South Dakota. The results indicated that both the psychological reactance trait and the attitude importance of the freedom to smoke influence gambling behavioral changes after a smoking ban went into effect. Individual attitudes towards …
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Petrology of the Cenozoic phonolites and related rocks of the Houston Creek area, Bear Lodge Mountains, Wyoming
… phonolite porphyry was emplaced as a sill at the Deadwood-Whitewood Formation contact. Sodalite-bearing phonolite appears to have been injected as dikes along fracture zones developed in altered felsite, which comprises the intrusive core of the Bear Lodge Mountains.</p> <p>Major element chemistry …
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Spatial ecology of the smooth softshell turtle (Apalone mutica) in the Kaskaskia River of Illinois
… males, but neither sex showed an affinity for deadwood. Overall, there were clear sexual differences in habitat preference, but sexual differences in movement rate and home range size were less pronounced. Conservation efforts should focus on reducing effects of fragmentation, maintaining …
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Discontinuities in the Icebox Formation (Ordovician), Williston Basin, North Dakota and Montana
… represent detrital sediments, probably from Deadwood deposits or reworked Precambrian rocks; which were deposited from distal sources such as the Canadian Shield and a southern deltaic source. Major, intermediate, and minor discontinuities indicate that the rate of sediment input varied …
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Coarse Woody Debris in Industrially Managed Pinus taeda Plantations of the Southeastern United States
Coarse woody debris (CWD) plays an influential role in forested ecosystems by adding organic matter to soils, stabilizing the soil environment, providing wildlife habitat, preventing soil erosion, providing seedling establishment habitat, and involvement in the nutrient cycle. Most CWD research has …
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