Bedrock geology at the south-central part of the North Range, Cuyuna district, Minnesota

10.3133/mf99 ◽  
1957 ◽  
Keyword(s):  
The South ◽  
The North ◽  
South Central ◽  
Bedrock Geology

Climatology and Trends of Climate Extremes of Temperature and Precipitation in Belo Monte Hydropower Plant – Eastern Amazon, Brazil

2021 ◽  
Author(s):  
Wanderson Luiz-Silva ◽  
Pedro Regoto ◽  
Camila Ferreira de Vasconcellos ◽  
Felipe Bevilaqua Foldes Guimarães ◽  
Katia Cristina Garcia
Keyword(s):  
Climate Change ◽  
Climate Extremes ◽  
Annual Rainfall ◽  
The South ◽  
North Central ◽  
Adaptation Capacity ◽  
The North ◽  
South Central ◽  
Daily Data ◽  
Belo Monte

<p>This research aims to support studies related to the adaptation capacity of the Amazon region to climate change. The Belo Monte Hydroelectric Power Plant (HPP) is in the Xingu River basin, in eastern Amazonia. Deforestation coupled with changes in water bodies that occurred in the drainage area of Belo Monte HPP over the past few decades can significantly influence the hydroclimatic features and, consequently, ecosystems and energy generation in the region. In this context, we analyze the climatology and trends of climate extremes in this area. The climate information comes from daily data in grid points of 0.25° x 0.25° for the period 1980-2013, available in http://careyking.com/data-downloads/. A set of 17 climate extremes indices based on daily data of maximum temperature (TX), minimum temperature (TN), and precipitation (PRCP) was calculated through the RClimDex software, recommended by the Expert Team on Climate Change Detection and Indices (ETCCDI). The Mann-Kendall and the Sen’s Curvature tests are used to assess the statistical significance and the magnitude of the trends, respectively. The drainage area of the Belo Monte HPP is dominated by two climatic types: an equatorial climate in the north-central portion of the basin, with high temperatures and little variation throughout the year (22°C to 32°C), in addition to more frequent precipitation; and a tropical climate in the south-central sector, which experiences slightly more pronounced temperature variations throughout the year (20°C to 33°C) and presents a more defined wet and dry periods. The south-central portion of the basin exhibits the highest temperature extremes, with the highest TX and the lowest TN of the year occurring in this area, both due to the predominant days of clear skies in the austral winter, as to the advance of intense masses of polar air at this period. The diurnal temperature range is lower in the north-central sector when compared to that in the south-central region since the first has greater cloud cover and a higher frequency of precipitation. The largest annual rainfall volumes are concentrated at the north and west sides (more than 1,800 mm) and the precipitation extremes are heterogeneous across the basin. The maximum number of consecutive dry days increases from the north (10 to 20 days) to the south (90 to 100 days). The annual frequency of warm days and nights is increasing significantly in a large part of the basin with a magnitude ranging predominantly from +7 to +19 days/decade. The annual rainfall shows a predominant elevation sign of up to +200 mm/decade only in the northern part of the basin, while the remainder shows a reduction of up to -100 mm/decade. The duration of drought periods increases in the south-central sector of the basin, reaching up to +13 days/decade in some areas. The results of this study will be used in the future as an important input, together with exposure, sensibility, and local adaptation capacity, to design adaptation strategies that are more consistent with local reality and to the needs of local communities.</p>

Surface faulting along the Superstition Hills fault zone and nearby faults associated with the earthquakes of 24 November 1987

1989 ◽  
Vol 79 (2) ◽  
pp. 252-281
Author(s):  
R. V. Sharp ◽  
K. E. Budding ◽  
J. Boatwright ◽  
M. J. Ader ◽  
M. G. Bonilla ◽  
...  
Keyword(s):  
Fault Zone ◽  
Lateral Displacement ◽  
Vertical Displacement ◽  
Repeated Measurements ◽  
The South ◽  
Surface Rupture ◽  
Imperial Valley ◽  
The North ◽  
South Central ◽  
The Right

Abstract The M 6.2 Elmore Desert Ranch earthquake of 24 November 1987 was associated spatially and probably temporally with left-lateral surface rupture on many northeast-trending faults in and near the Superstition Hills in western Imperial Valley. Three curving discontinuous principal zones of rupture among these breaks extended northeastward from near the Superstition Hills fault zone as far as 9 km; the maximum observed surface slip, 12.5 cm, was on the northern of the three, the Elmore Ranch fault, at a point near the epicenter. Twelve hours after the Elmore Ranch earthquake, the M 6.6 Superstition Hills earthquake occurred near the northwest end of the right-lateral Superstition Hills fault zone. Surface rupture associated with the second event occurred along three strands of the zone, here named North and South strands of the Superstition Hills fault and the Wienert fault, for 27 km southeastward from the epicenter. In contrast to the left-lateral faulting, which remained unchanged throughout the period of investigation, the right-lateral movement on the Superstition hills fault zone continued to increase with time, a behavior that was similar to other recent historical surface ruptures on northwest-trending faults in the Imperial Valley region. We measured displacements over 339 days at as many as 296 sites along the Superstition Hills fault zone, and repeated measurements at 49 sites provided sufficient data to fit with a simple power law. Data for each of the 49 sites were used to compute longitudinal displacement profiles for 1 day and to estimate the final displacement that measured slips will approach asymptotically several years after the earthquakes. The maximum right-lateral slip at 1 day was about 50 cm near the south-central part of the North strand of Superstition Hills fault, and the predicted maximum final displacement is probably about 112 cm at Imler Road near the center of the South strand of the Superstition Hills fault. The overall distributions of right-lateral displacement at 1 day and the estimated final slip are nearly symmetrical about the midpoint of the surface rupture. The average estimated final right-lateral slip for the Superstition Hills fault zone is about 54 cm. The average left-lateral slip for the conjugate faults trending northeastward is about 23 cm. The southernmost ruptured member of the Superstition Hills fault zone, newly named the Wienert fault, extends the known length of the zone by about 4 km. The southern half of this fault, south of New River, expressed only vertical displacement on a sinuous trace. The maximum vertical slip by the end of the observation period there was about 25 cm, but its growth had not ceased. Photolineaments southeast of the end of new surface rupture suggest continuation of the Superstition Hills fault zone in farmland toward Mexico.

scholarly journals Performance of Landscape Roses Grown with Minimal Input in the North-central, Central, and South-central United States

2017 ◽  
Vol 27 (5) ◽  
pp. 718-730 ◽  
Author(s):  
David C. Zlesak ◽  
Randy Nelson ◽  
Derald Harp ◽  
Barbara Villarreal ◽  
Nick Howell ◽  
...  
Keyword(s):  
United States ◽  
National Level ◽  
The United States ◽  
The South ◽  
Flower Number ◽  
North Central ◽  
The North ◽  
South Central ◽  
Central United States ◽  
Plant Hardiness

Landscape roses (Rosa sp.) are popular flowering shrubs. Consumers are less willing or able to maintain landscape beds than in years past and require plants that are not only attractive, but well-adapted to regional climatic conditions, soil types, and disease and pest pressures. Marketing and distribution of rose cultivars occurs on a national level; therefore, it is difficult for U.S. consumers in the U.S. Department of Agriculture (USDA) Plant Hardiness Zones 3 to 5 to identify well-adapted, cold-hardy cultivars. Identifying suitable cultivars that have strong genetic resistance to pests and disease and that will tolerate temperature extremes without winter protection in the USDA Plant Hardiness Zones 3 to 5 is of tremendous value to consumers and retailers in northern states. Twenty landscape rose cultivars, primarily developed in north-central North America, were evaluated at five locations in the United States (three in the north-central United States, one in the central United States, and one in the south-central United States) using the low-input, multiyear Earth-Kind® methodology. Six roses had ≥75% plant survival at the end of the study and were in the top 50% of performers for overall mean horticultural rating at each of the three north-central U.S. sites: ‘Lena’, ‘Frontenac’, ‘Ole’, ‘Polar Joy’, ‘Sunrise Sunset’, and ‘Sven’. Five of these six roses met the same criteria at the central United States (exception ‘Lena’) and the south-central United States (exception ‘Polar Joy’) sites. Cultivar, rating time, and their interaction were highly significant, and block effects were not significant for horticultural rating for all single-site analyses of variance. Significant positive correlations were found between sites for flower number, flower diameter, and overall horticultural rating. Significant negative correlations were found between flower number and diameter within each site and also between black spot (Diplocarpon rosae) lesion size from a previous study and overall horticultural rating for three of the five sites. Cane survival ratings were not significantly correlated with overall horticultural rating, suggesting some cultivars can experience severe winter cane dieback, yet recover and perform well. Data from this study benefit multiple stakeholders, including nurseries, landscapers, and consumers, with evidence-based regional cultivar recommendations and breeders desiring to identify regionally adapted parents.

A new North American chorus frog species (Amphibia: Hylidae: Pseudacris) from the south-central United States

Zootaxa ◽  
2008 ◽  
Vol 1675 (1) ◽  
pp. 1 ◽  
Author(s):  
EMILY MORIARTY LEMMON ◽  
ALAN R. LEMMON ◽  
JOSEPH T. COLLINS ◽  
DAVID C. CANNATELLA
Keyword(s):  
United States ◽  
New Species ◽  
North American ◽  
Advertisement Call ◽  
The South ◽  
The North ◽  
South Central ◽  
Central United States ◽  
Chorus Frog ◽  
Genetic Characters

We describe a new species of chorus frog of the North American treefrog genus Pseudacris from the south-central United States. This new species is morphologically similar to the parapatric species P. feriarum and has thus previously been considered synonymous with this species. The new species is geographically distinct from P. feriarum and from its sister species, P. nigrita. We diagnose the new species based on advertisement call, morphological, and genetic characters.

Winchester

2020 ◽  
Author(s):  
Simon Roffey
Keyword(s):  
Iron Age ◽  
Central Place ◽  
British History ◽  
Anglo Saxon ◽  
The South ◽  
Norman Conquest ◽  
The North ◽  
South Central ◽  
Charles Ii ◽  
Power Center

Winchester lays claim to being one of the most important cities in British history. The city has a central place in British myth and legend and was once ancient capital and residence of the Anglo-Saxon and early Norman kings. Winchester is also one of the most extensively excavated medieval towns in England and was the training ground for modern British archeology. Situated in south-central England, Winchester was close to key communication routes via the south coast and the important medieval port at Southampton. Founded in the Roman period as Venta Belgarum, close to the site of the Iron Age market settlement, Winchester quickly grew into a prosperous Roman civitas. After the decline of Roman power in Britain, Winchester remained as an important power center in the south and by the mid-7th century was the pre-eminent town in the newly established Anglo-Saxon kingdom of Wessex. With the consolidation of Wessex’s power in the 9th and 10th centuries and the eventual re-establishment of control over the former Viking-influenced areas of the midlands and the north, Winchester became the seat of English royal power. With the Norman Conquest in 1066, the early Norman kings sought to keep Winchester as the royal seat. However, with the rising pre-eminence of London in the mid-12th century, Winchester’s power declined as royal and secular power shifted to London. Nevertheless, Winchester was still to remain of some importance throughout the medieval period and its bishop one of the most powerful, influential, and richest lords in medieval England; a status still attested to by the city’s medieval cathedral. As a city of many religious foundations, Winchester’s fortunes waned after the Reformation to be briefly reborn in the later 17th century with the planned construction of Charles II palace on the site of the former medieval castle. Charles’ plans to reinvent Winchester as a revitalized English royal city were aborted with his untimely death in 1688, with the palace, designed by Christopher Wren, barely finished.

Lower Pennsylvanian (Morrowan) Ammonoids from the North American Midcontinent

1980 ◽  
Vol 54 (S10) ◽  
pp. 1-56 ◽  
Author(s):  
Walter L. Manger ◽  
W. Bruce Saunders
Keyword(s):  
North American ◽  
Type Species ◽  
Lower Portion ◽  
Golf Course ◽  
South Urals ◽  
The South ◽  
The North ◽  
South Central ◽  
Basal Conglomerate ◽  
Hill Prairie

The Lower Pennsylvanian Hale Formation, which comprises the lower portion of the type Morrowan Series, in northwestern Arkansas, is subdivided into the Cane Hill and overlying Prairie Grove Members. The Cane Hill Member includes interbedded shale and sandstone with a basal conglomerate containing clasts reworked from underlying, truncated Mississippian formations. The Prairie Grove Member is highly variable, but includes sandy biosparite and calcareous sandstone. Highly fossiliferous pebble conglomerate and calcirudite lenses occur sporadically throughout the Hale Formation. Ammonoids and conodonts show that the Cane Hill-Prairie Grove boundary is unconformable.Several thousand ammonoids collected from more than 100 localities in the Hale Formation show that four ammonoid zones and two subzones are recognizable in the Hale succession, and consequently in the redefined Halian Stage of the Morrowan Series. These are, in ascending order, the Retites semiretia, Quinnites henbesti, Arkanites relictus (including the Arkanites relictus relictus and overlying Cancelloceras huntsvillense Subzones) and Verneuilites pygmaeus Zones. Halian Stage ammonoids are known primarily from northern Arkansas, but an upper Arkanites relictus Zone (Cancelloceras huntsvillense Subzone) ammonoid assemblage occurs in the Primrose Member of the Golf Course Formation in south central Oklahoma.Conodont-ammonoid associations in the Hale sequence provide a basis for integration of independently based zonal information. Rhachistognathus primus Zone conodonts occur in the Retites semiretia Zone; the Idiognathoides sinuatus Zone ranges through the Quinnites henbesti and Arkanites relictus relictus Subzone. The overlying Cancelloceras huntsvillense Subzone and Verneuilites pygmaeus Zone both contain conodonts of the Neognathodus symmetricus Zone.The Hale ammonoid succession has few, if any, species in common with the type Namurian of Europe, but numerous genera are common to both sequences and the generic successions coincide and are equivalent in degree of development. The Retites semiretia Zone is equivalent to the Reticuloceras circumplicatile Zone (R1a); the Quinnites henbesti and lower Arkanites relictus Zones correspond to some portion of the R2b–R2c interval; and the upper Arkanites relictus Zone and the Verneuilites pygmaeus Zone correlate to Zone G1. The Retites semiretia Zone correlates to the lower Reticuloceras-Baschkortoceras Genozone (Nm2b1) of the upper Namurian in the south Urals; the Quinnites henbesti Zone is equivalent to some portion of the Nm2b2–3 intervals of this zone; the lower Arkanites relictus Zone is equivalent to the lower Bilinguites-Cancelloceras Genozone (Nm2c1) and the upper Arkanites relictus and Verneuilites pygmaeus Zones correspond to the uppermost interval (Nm2c2) in the south Urals sequence.Systematic descriptions of biostratigraphically significant Halian taxa, including Reticuloceras tiro Gordon, R. wainwrighti Quinn, Retites semiretia McCaleb, Arkanites relictus relictus (Quinn, McCaleb, and Webb), A. relictus redivivus n.subsp., Quinnites n.gen. (type species Q. henbesti (Gordon)), Q. textum (Gordon), Bilinguites eliasi n.sp., Cancelloceras huntsvillense n.sp., and Verneuilites pygmaeus (Mather) are also presented.

South America II: The Southern Cone

Horse Nations ◽  
2015 ◽  
Author(s):  
Peter Mitchell
Keyword(s):  
Native Americans ◽  
Southern Cone ◽  
The South ◽  
The West ◽  
The North ◽  
Andean Cordillera ◽  
South Central ◽  
Southern Patagonia ◽  
Desert Steppes ◽  
Formed Part

Taking in the Andean cordillera, the Pampas grasslands of Argentina and Uruguay, the desert steppes of southern Patagonia, and the temperate lowlands of south-central Chile (Araucanía), this chapter explores the horse’s arrival and impact in South America’s Southern Cone. Convention divides the Cone along the spine of the mountains between Chile and Argentina. To their east it contrasts the Pampas in the north with Patagonia in the south. I follow most recent scholarship in stressing the historical connections that such boundaries obscure. Similarly, I emphasize not only the acquisition of horses, but also the significance of hunting, taking, and trading feral livestock and the adoption of elements of food production. Both developments formed part of the inclusion of ‘free’ Native Americans within broader international political and commercial systems. At the same time, the work of anthropologists and the comments of contemporary European observers make the Southern Cone one of the most richly documented regions of all for studying the emergence of Horse Nations post-1492. The Southern Cone is environmentally far more complex than a simple tripartite classification into Araucanía, Patagonia, and Pampas suggests. In the north the Pampas reach to the Paraná and Salado drainages, to the south as far as the Río Colorado and its tributaries. They extend east to include Uruguay and the Brazilian state of Rio Grande do Sul and in the west reach the Andean foothills. A basic division follows the 500 mm isohyet: to its west the Dry Pampa is increasingly water-deficient, while to the east the Humid Pampa ultimately benefits from as much as 800 mm of rain a year (Plate 23). The Uruguayan Savannah forms a third ecological subdivision that includes areas with palms and some forest enclaves. Generally, the Pampas comprise a gently sloping plain covered by extensive grasslands, but drier-adapted shrub occurs in the west and a wedge of forest penetrates their centre from the north. The Sierra de Tandilia and Sierra de la Ventana south of Buenos Aires are rare areas of higher relief. Climate is temperate, but surface water is often scarce, stone for tool-making rare, game dispersed.

Archaeology of the San Augustin Plains, a Preliminary Report

1949 ◽  
Vol 14 (3) ◽  
pp. 172-194 ◽  
Author(s):  
Wesley R. Hurt ◽  
Daniel McKnight
Keyword(s):  
New Mexico ◽  
Preliminary Report ◽  
Major Portion ◽  
The South ◽  
The West ◽  
Mountain Ranges ◽  
The North ◽  
South Central ◽  
Continental Divide ◽  
North Lake

The San Augustin Plains of south central New Mexico contain several pluvial lake basins, on the terraces of which are numerous blowout sites with remains of Early Man. The major portion of the Plains lies to the south of U.S. Highway 60, between Magdalena and Datil, New Mexico. This is the area of the basin of extinct Lake San Augustin. The small portion of the Plains to the north of the highway contains the basins of White Lake and North Lake. The Plains consist of a large basin some 60 miles long from northeast to southwest, varying in width from 20 miles at the northeast end to about 6 miles at the southwest. On three sides of the Plains are a series of mountain ranges, while on the west are the ranges that form the continental divide (Fig. 41).

The Liroria ewingi complex (Anura : Hylida) in south-eastern Australia II. Genetic incompatibility and delimitation of a narrow hybrid zone between L. ewingi and L. paraewingi

1972 ◽  
Vol 20 (4) ◽  
pp. 423 ◽  
Author(s):  
GF Watson
Keyword(s):  
Backcross Progeny ◽  
Similar Species ◽  
The South ◽  
Genetic Incompatibility ◽  
Developmental Abnormalities ◽  
North West ◽  
The North ◽  
South Central ◽  
Eastern Australia ◽  
Consequent Reduction

Most hybrid embryos resulting from artificial crosses between females of Litoria ewingi and males of L. paraewingi are characterized by specific developmental abnormalities-acephaly and anophthalmia. This criterion was used to map the area of interaction between these morphologically similar species in south central Victoria by crossing males from different localities to females of L. ewingi. Three categories of males were recognized on the basis of the proportion of anophthalmic embryos in their offspring: L. ewingi, L. paraewingi, and putative hybrids or backcross progeny. Frequencies of developmental abnormalities in field-collected egg masses were also determined and related to the laboratory crosses. The results of these analyses revealed that the species form a narrow zone of interaction, with males of both species being present throughout the zone, as well as presumed hybrids and backcross progeny. The zone of overlap has been plotted from near Narbethong in the south-east to north of Seymour in the north-west (c. 100 km). Its width varies from less than 5 km in the south-east, where it appears to be correlated with a forest-grassland ecotone, to about 11 km near its northwestern limit, where a sharp vegetational gradient is absent. The presumed antiquity of the contact, and the narrowness of the zone, suggest a stable situation. It is postulated that any selection towards reinforcement of premating isolating mechanisms within the zone, and consequent reduction of hybridization, is counteracted by a continual input of naive individuals from adjacent allopatry.

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