scholarly journals Foredeep vs. wedge-top facies trends and hierarchical thickness distributions, Pennsylvanian Atoka Formation, Ouachita Mountains, USA

2019 ◽  
Author(s):  
Pengfei Hou ◽  
Zane Richards Jobe ◽  
Leslie Wood
Keyword(s):  
The United States ◽  
Complex Topography ◽  
Ouachita Mountains ◽  
Submarine Fan ◽  
Fine Grained ◽  
Significant Control ◽  
Architectural Elements ◽  
Hydrocarbon Reservoir ◽  
South Central ◽  
Fold And Thrust Belt

As of Feb. 5th, 2019, this study has been submitted to Marine and Petroleum Geology (Elsevier). Topographic confinement can impose significant control on depositional styles of deepwater fan deposits. Currently, there is a lack of quantitative documentation on the spatial variation of topographic confinement in segmented deepwater basins. Herein, we investigated the Pennsylvanian Lower Atoka Formation in the Ouachita Mountains, south-central the United States which is a fine-grained submarine fan system deposited on the active Ouachita Fold and Thrust Belt. The basin is divided by two distinctive depozones that are laterally confined: foredeep and wedge-top, both of which are primarily sourced from the east. We quantitatively compared the lithofacies, architectural elements, and hierarchical thickness distributions of turbidite lobe deposits among proximal foredeep, distal foredeep, proximal wedge-top, and distal wedge-top depozones. The proximal foredeep and wedge-top show identical lithofacies compositions and thickness distributions of lobe deposits. However, the foredeep shows a significant proximal-distal decrease in sand-prone deposits and thicknesses of lobe deposits, whereas the wedge-top show little to no such changes. We demonstrated that the complex topography and stronger lateral confinement in the wedge-top depozone is the dominant control for this difference. The signal of topographic confinement increases hierarchically from bed to lobe scales because these deposits tend to stack more vertically rather than switching horizontally (or compensationally) due to confinement. The results have implications for predicting hydrocarbon reservoir distribution, recognizing the degree of confinement, and refining the depositional reconstruction of analogous laterally-confined turbidite systems.

Civil sphere and democracy in Latin America

2020 ◽  
pp. 23-40
Author(s):  
Jeffrey Ch. Alexander ◽  
Carlo Tognato
Keyword(s):  
Latin America ◽  
Social Relations ◽  
Political Institutions ◽  
The United States ◽  
Way Of Life ◽  
Global Context ◽  
Fine Grained ◽  
Class Stratification ◽  
Civil Sphere ◽  
The Everyday

The purpose of the article is to demonstrate that the civil spheres of Latin America remain in force, even when under threat, and to expand the method of theorizing democracy, understanding it not only as a state form, but also as a way of life. Moreover, the task of the authors goes beyond the purely application of the theory of the civil sphere in order to emphasize the relevance not only in practice, but also in the theory of democratic culture and institutions of Latin America. This task requires decolonizing the arrogant attitude of North theorists towards democratic processes outside the United States and Europe. The peculiarities of civil spheres in Latin America are emphasized. It is argued that over the course of the nineteenth century the non-civil institutions and value spheres that surrounded civil spheres deeply compromised them. The problems of development that pockmarked Latin America — lagging economies, racial and ethnic and class stratification, religious strife — were invariably filtered through the cultural aspirations and institutional patterns of civil spheres. The appeal of the theory of the civil sphere to the experience of Latin America reveals the ambitious nature of civil society and democracy on new and stronger foundations. Civil spheres had extended significantly as citizens confronted uncomfortable facts, collectively searched for solutions, and envisioned new courses of collective action. However when populism and authoritarianism advance, civil understandings of legitimacy come under pressure from alternative, anti-democratic conceptions of motives, social relations, and political institutions. In these times, a fine-grained understanding of the competitive dynamics between civil, non-civil, and anti-civil becomes particularly critical. Such a vision is constructively applied not only to the realities of Latin America, but also in a wider global context. The authors argue that in order to understand the realities and the limits of populism and polarization, civil sphere scholars need to dive straight into the everyday life of civil communities, setting the civil sphere theory (CST) in a more ethnographic, “anthropological” mode.

Local Histories/Global Designs

2012 ◽  
Author(s):  
Walter D. Mignolo
Keyword(s):  
Social Sciences ◽  
Central America ◽  
Postcolonial Studies ◽  
The United States ◽  
Philosophy Of History ◽  
South Central ◽  
The Social ◽  
The Caribbean ◽  
Border Thinking ◽  
East West

This book is an extended argument about the “coloniality” of power. In a shrinking world where sharp dichotomies, such as East/West and developing/developed, blur and shift, this book points to the inadequacy of current practices in the social sciences and area studies. It explores the crucial notion of “colonial difference” in the study of the modern colonial world and traces the emergence of an epistemic shift, which the book calls “border thinking.” Further, the book expands the horizons of those debates already under way in postcolonial studies of Asia and Africa by dwelling on the genealogy of thoughts of South/Central America, the Caribbean, and Latino/as in the United States. The book's concept of “border gnosis,” or sensing and knowing by dwelling in imperial/colonial borderlands, counters the tendency of occidentalist perspectives to manage, and thus limit, understanding. A new preface discusses this book as a dialogue with Hegel's Philosophy of History.

scholarly journals Exposure of Domestic Cats to Three Zoonotic Bartonella Species in the United States

Pathogens ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 354
Author(s):  
Lynn M. Osikowicz ◽  
Kalanthe Horiuchi ◽  
Irina Goodrich ◽  
Edward B. Breitschwerdt ◽  
Bruno Chomel ◽  
...  
Keyword(s):  
New England ◽  
The United States ◽  
Severe Illness ◽  
Domestic Cats ◽  
Bartonella Species ◽  
Serum Samples ◽  
North Central ◽  
Middle Atlantic ◽  
South Central ◽  
Central Regions

Cat-associated Bartonella species, which include B. henselae, B. koehlerae, and B. clarridgeiae, can cause mild to severe illness in humans. In the present study, we evaluated 1362 serum samples obtained from domestic cats across the U.S. for seroreactivity against three species and two strain types of Bartonella associated with cats (B. henselae type 1, B. henselae type 2, B. koehlerae, and B. clarridgeiae) using an indirect immunofluorescent assay (IFA). Overall, the seroprevalence at the cutoff titer level of ≥1:64 was 23.1%. Seroreactivity was 11.1% and 3.7% at the titer level cutoff of ≥1:128 and at the cutoff of ≥1:256, respectively. The highest observation of seroreactivity occurred in the East South-Central, South Atlantic, West North-Central, and West South-Central regions. The lowest seroreactivity was detected in the East North-Central, Middle Atlantic, Mountain, New England, and Pacific regions. We observed reactivity against all four Bartonella spp. antigens in samples from eight out of the nine U.S. geographic regions.

The Hayes Tephra Deposits, and Upper Holocene Marker Horizon in South-Central Alaska

1990 ◽  
Vol 33 (3) ◽  
pp. 276-290 ◽  
Author(s):  
James R. Riehle ◽  
Peter M. Bowers ◽  
Thomas A. Ager
Keyword(s):  
Cook Inlet ◽  
Radiocarbon Dates ◽  
Fine Grained ◽  
South Central ◽  
Inlet Region ◽  
Tephra Deposits ◽  
Phenocryst Content

AbstractThe most widespread of all Holocene tephra deposits in the Cook Inlet region of south-central Alaska is a set of deposits from Hayes volcano. Because of their unique phenocryst content—biotite in rare amounts and a high proportion of amphibole to pyroxene—the deposits are readily identifiable at all but the most distant sites where they are very fine grained. Eighteen radiocarbon dates from eight upland sites limit the age of the tephra set to between about 3500 and 3800 yr. The set originated at Hayes volcano in the Tordrillo Mountains 150 km northwest of Anchorage; seven or possibly eight closely succeeding deposits, low-silica dacite in composition, compose two main lobes that extend northeast for 400 km and south for at least 250 km from the vent. We estimate the total tephra volume to be 10 km3; multiple layers imply four to six larger and two or three smaller eruptions. The deposits are a nearly isochronous marker horizon that should be useful in future archeologic, geologic, and palynologic studies in the region.

Access to Healthy Foods in Rural Minnesota: A Pilot Analysis of Corner Stores

2017 ◽  
Vol 32 (3) ◽  
Author(s):  
Karl L Larson ◽  
Megan Mullaney ◽  
Esther Mwangi ◽  
Deu Xiong ◽  
Frances Ziegler
Keyword(s):  
Fruits And Vegetables ◽  
Food Choices ◽  
The United States ◽  
United States Department ◽  
Healthy Foods ◽  
Department Of Agriculture ◽  
Quality Food ◽  
South Central ◽  
Corner Stores ◽  
Access To Healthy Foods

Food deserts are identified by the United States Department of Agriculture as areas where asignificant proportion of the population lack access to quality food choices. The purpose of this study was toassess the availability of quality fruits, vegetables, dry good, and meats at corner store locations in a south-central Minnesota county designated a food desert. Corner stores (n=22) were audited for the presence of20 fresh fruits and vegetables, low-fat meats, and whole grain dry goods. Results indicate more than three-quarters of corner stores did not provide sufficient access to healthy foods, and were not provide sufficientaccess to quality food for residents in the county.

scholarly journals Fine-grained, spatio-temporal datasets measuring 200 years of land development in the United States

2020 ◽  
Author(s):  
Johannes H. Uhl ◽  
Stefan Leyk ◽  
Caitlin M. McShane ◽  
Anna E. Braswell ◽  
Dylan S. Connor ◽  
...  
Keyword(s):  
United States ◽  
Temporal Resolution ◽  
Data Extraction ◽  
Historical Analysis ◽  
Land Development ◽  
Remote Sensing Data ◽  
The United States ◽  
Building Stock ◽  
Fine Grained ◽  
Spatio Temporal

Abstract. The collection, processing and analysis of remote sensing data since the early 1970s has rapidly improved our understanding of change on the Earth’s surface. While satellite-based earth observation has proven to be of vast scientific value, these data are typically confined to recent decades of observation and often lack important thematic detail. Here, we advance in this arena by constructing new spatially-explicit settlement data for the United States that extend back to the early nineteenth century, and is consistently enumerated at fine spatial and temporal granularity (i.e., 250 m spatial, and 5 a temporal resolution). We create these time series using a large, novel building stock database to extract and map retrospective, fine-grained spatial distributions of built-up properties in the conterminous United States from 1810 to 2015. From our data extraction, we analyse and publish a series of gridded geospatial datasets that enable novel retrospective historical analysis of the built environment at unprecedented spatial and temporal resolution. The datasets are available at https://dataverse.harvard.edu/dataverse/hisdacus (Uhl and Leyk, 2020a, b, c, d).

scholarly journals New Insights into Rental Housing Markets across the United States: Web Scraping and Analyzing Craigslist Rental Listings

2017 ◽  
Author(s):  
Geoff Boeing
Keyword(s):  
Census Data ◽  
Rental Housing ◽  
Housing Markets ◽  
The United States ◽  
Spatial And Temporal Patterns ◽  
Single Digit ◽  
Fine Grained ◽  
Alternative Sources ◽  
Apartment Complexes ◽  
The U.S

Current sources of data on rental housing – such as the census or commercial databases that focus on large apartment complexes – do not reflect recent market activity or the full scope of the U.S. rental market. To address this gap, we collected, cleaned, analyzed, mapped, and visualized 11 million Craigslist rental housing listings. The data reveal fine-grained spatial and temporal patterns within and across metropolitan housing markets in the U.S. We find some metropolitan areas have only single-digit percentages of listings below fair market rent. Nontraditional sources of volunteered geographic information offer planners real-time, local-scale estimates of rent and housing characteristics currently lacking in alternative sources, such as census data.

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