Environmental and Chronological Factors in the Mesa Verde-Northern Rio Grande Migration

1995 ◽  
Vol 14 (2) ◽  
pp. 125-142 ◽  
Author(s):  
Richard V.N. Ahlstrom ◽  
Carla R. Van West ◽  
Jeffrey S. Dean
Keyword(s):  
Rio Grande ◽  
Mesa Verde ◽  
Northern Rio Grande

Temporal Variation in Obsidian Procurement in the Northern Rio Grande and Its Implications for Obsidian Movement into the San Juan Area

2019 ◽  
Vol 85 (1) ◽  
pp. 152-170 ◽  
Author(s):  
James L. Moore ◽  
Eric Blinman ◽  
M. Steven Shackley
Keyword(s):  
Thirteenth Century ◽  
Rio Grande ◽  
Raw Material ◽  
Migration Stream ◽  
North Central ◽  
Reverse Migration ◽  
Pajarito Plateau ◽  
Mesa Verde ◽  
Northern Rio Grande ◽  
Mesa Verde Region

Arakawa and colleagues (2011) use temporal changes in obsidian source patterns to link the late thirteenth-century abandonment of the Mesa Verde region to Ortman's (2010, 2012) model of Tewa migration to the northern Rio Grande. They employ Anthony's (1990) concept of reverse migration, inferring that an increase in Mesa Verde–region obsidian from a specific Jemez Mountain source reflects the scouting of an eventual migration path. Weaknesses of this inference are that only obsidian data from the Mesa Verde region were used in its development and that the model does not consider the complexities of previously documented patterns of settlement and stone raw material use in the northern Rio Grande. By examining source data from parts of northwestern and north-central New Mexico, we find that the patterning seen in the Mesa Verde obsidian data is widespread both geographically and temporally. The patterns are more indicative of a change in acquisition within a down-the-line exchange system than a reverse migration stream. Population trends on the southern Pajarito Plateau, the probable source of the acquisition change, suggest ancestral Keres rather than Tewa involvement in thirteenth-century obsidian distribution.

The Better Angels of their Nature: Declining Violence through Time Among Prehispanic Farmers of the Pueblo Southwest

2014 ◽  
Vol 79 (3) ◽  
pp. 444-464 ◽  
Author(s):  
Timothy A. Kohler ◽  
Scott G. Ortman ◽  
Katie E. Grundtisch ◽  
Carly M. Fitzpatrick ◽  
Sarah M. Cole
Keyword(s):  
Rio Grande ◽  
Religious Practice ◽  
American Southwest ◽  
Human Bone ◽  
The North ◽  
Mesa Verde ◽  
Historical Factors ◽  
Per Capita ◽  
Northern Rio Grande ◽  
North American Southwest

The central Mesa Verde and the northern Rio Grande regions housed two of the densest populations of prehispanic Pueblo peoples in the North American Southwest. We plot incidence of violent trauma on human bone through time in each region. Such violence peaked in the mid-A.D. 1100s in the central Mesa Verde, and in general was higher through time there than in the northern Rio Grande region. In the central Mesa Verde, but not in the northern Rio Grande, there is a tendency for violence to be greater in periods of low potential maize produccción per capita and high variance in maize produccción, though these structural tendencies were on occasion overridden by historical factors such as the expansion and demise of the Chacoan polity and the regional depopulation. Violence generally declined through time in the northern Rio Grande until the arrival of the Spanish, even as populations increased. We propose that this decline was due to the combination of increased social span of polities, the importance of inter-Pueblo sodalities, the nature of religious practice, “gentle commerce,“ and increased adherence to a set of nonviolent norms.

GEOMORPHIC AND INCISION HISTORY OF THE NORTHERN RIO GRANDE RIVER GORGE NEAR QUESTA, NEW MEXICO

2016 ◽  
Author(s):  
Travis W. Clow ◽  
◽  
Whitney M. Behr ◽  
Mark Helper ◽  
Peter Gold ◽  
...  
Keyword(s):  
New Mexico ◽  
Rio Grande ◽  
History Of ◽  
Rio Grande River ◽  
Northern Rio Grande

Earthquake Hazard Estimation in Areas of Low Historical Seismicity: A Focus on the Northern Rio Grande Rift, Colorado and New Mexico

1990 ◽  
Vol 6 (4) ◽  
pp. 657-680 ◽  
Author(s):  
Charles E. Glass
Keyword(s):  
New Mexico ◽  
Gaussian Model ◽  
Rio Grande ◽  
Earthquake Hazard ◽  
Weibull Model ◽  
Historical Seismicity ◽  
Rio Grande Rift ◽  
Earthquake Activity ◽  
Sangre De Cristo ◽  
Northern Rio Grande

Estimates of the probability of future earthquake activity are difficult to make in areas where historical seismicity may be low or absent, but where young fault scarps attest to recent or ongoing tectonism. Three non-Poisson models, a Weibull model, a Gaussian model and a lognormal model, are used to estimate the earthquake hazard for one such area, the northern Rio Grande Rift. This portion of the Rio Grande Rift displays numerous Holocene faults attesting to ongoing tectonism, but displays essentially no historical seismicity. The earthquake hazard for the Sangre de Cristo fault zone from Taos, New Mexico to Salida, Colorado calculated using these models is remarkably consistent (probability of at least one Mo = 7 earthquake in the next 50 years ∼ 2.5 × 10−3), with increased hazard for the Sangre de Cristo fault in north San Luis Valley (∼5.0×10−3) and near Taos (∼1.0×10−2) due to the long holding times along these segments.

scholarly journals Poisoning by Senecio brasiliensis in Horses in Northern Rio Grande do Sul

2019 ◽  
Vol 47 ◽  
Author(s):  
Stéfano Leite Dau ◽  
Tanise Policarpo Machado ◽  
Ezequiel Davi Dos Santos ◽  
Diorges Henrique Setim ◽  
Eduardo Rebelato Sakis ◽  
...  
Keyword(s):  
Central Nervous System ◽  
Weight Loss ◽  
Pyrrolizidine Alkaloid ◽  
Clinical Signs ◽  
Rio Grande ◽  
Type Ii ◽  
Post Mortem ◽  
Rio Grande Do Sul ◽  
Proprioceptive Deficit ◽  
Northern Rio Grande

Background: In various regions of Brazil, horses and cattle are considered the most susceptible animals to plant poisoning. The plants of the genus Senecio are the most important in Rio Grande do Sul because they have the active principle known as the pyrrolizidine alkaloid. Its diagnosis is made through epidemiology, clinical signs and histopathological analysis, either of the tissues obtained by biopsy or necropsy. The objective of this study was to report and characterize the epidemiological, clinical and anatomopathological findings of three cases of natural poisoning by Senecio brasiliensis in horses assisted at the Hospital Veterinário (HV) of the Universidade de Passo Fundo (UPF).Cases: Three traction horses, two males and one female, were admitted at the HV-UPF for clinical care. The animals were presenting anorexia, weight loss, dysmetria, proprioceptive deficit and signs suggestive of colic. The epidemiological study revealed that the sites where these animals were located were infested by Senecio brasiliensis. The support therapy used for equine colic in all three cases was unsuccessful. One of the animals died and the other two were euthanized, all three of them being reffered for necropsy. The post-mortem findings were mainly found in the liver, which showed accentuation of the lobular pattern and the appearance of nutmeg. During necropsy, fragments of organs from thoracic and abdominal cavities and central nervous system were collected and fixed in 10% buffered formalin. Subsequently, the samples were processed chemically, submitted to cuts of five micrometers of thickness and stained with hematoxylin and eosin for microscopic analysis. Microscopically, the liver of all three horses presented megalocytosis, fibrosis and bile ducts hyperplasia. In the central nervous system, spongiosis and the presence of Alzheimer type II astrocytes were observed. Thus, through the association of information, the diagnosis of poisoning by Senecio brasiliensis was achieved.Discussion: The diagnosis of natural poisoning by Senecio brasiliensis was obtained through the epidemiological survey that showed S. brasiliensis in pastures where all three horses were allocated.  Cases of intoxication by S. brasieliensis in cattle are more frequent than in equines, although both species are considered the most susceptible. In horses, the main clinical manifestations observed include neurological disorders, apathy, anorexia, dysphagia, weight loss, subcutaneous edema and icterus. The clinical signs presented by the equines suggested initial signs of colic syndrome, although anorexia, weight loss, dysmetria and proprioceptive deficit are commonly observed in pyrrolizidine alkaloid poisoning in the liver, both in cattle and horses. The pyrrolizidine alkaloids present in the genus Senecio that become toxic when biotransformed in the liver into a pyrrholic form highly reactive that inhibits cell mitosis and leads to the onset of megalocytosis, cell death and liver fibrosis. The necropsy findings and histopathology were characteristic of poisoning in equines, since the predominant macroscopic lesions in the liver were hepatomegaly and accentuation of lobular pattern, whereas microscopically, there was a predominance of hepatic fibrosis, megalocytosis, spongiosis and the incidence of Alzheimer's type II astrocytes in the brain. These lesions are observed both in natural and in experimental cases of poisoning in horses. Thus, through the ante-mortem and complete post-mortem evaluation of the three equines, it was possible to establish the occurrence of natural poisoning by Senecio brasiliensis in Northern Rio Grande do Sul, as well as to characterize the epidemiological, clinical and anatomopathological findings of poisoning in this species.

The Construction and Configuration of Anasazi Pebble-Mulch Gardens in the Northern Rio Grande

1995 ◽  
Vol 60 (3) ◽  
pp. 459-470 ◽  
Author(s):  
Dale R. Lightfoot ◽  
Frank W. Eddy
Keyword(s):  
Soil Moisture ◽  
New Mexico ◽  
Crop Yields ◽  
Rio Grande ◽  
Growing Season ◽  
Size And Shape ◽  
Galisteo Basin ◽  
Northern Rio Grande ◽  
Increase Soil Moisture

Rio Grande Anasazi in the fourteenth and fifteenth centuries A.D. mulched hundreds of garden-sized plots with pebbles to increase soil moisture, reduce erosion, extend the growing season, and increase crop yields. This paper reports on the construction and configuration of pebble-mulch gardens in New Mexico, focusing particularly on those in the Galisteo Basin. Surfaces adjacent to these gardens were scraped and pits were excavated to collect gravel, which was placed over garden surfaces in layers 5 to 11 cm thick. Gardens averaged 15 x 23 m in size, although both size and shape were highly variable, and they collectively covered an area of 41,000 m2 Although this unique agricultural strategy has been shown to be effective, construction was limited to sites with natural gravel deposits, pebbled surfaces inhibited the recycling of crop wastes, and such gardens never became as widely used as more traditional field forms.

FORAGERS AND FARMERS IN THE NORTHERN RIO GRANDE VALLEY, NEW MEXICO

KIVA ◽  
2007 ◽  
Vol 73 (2) ◽  
pp. 117-130 ◽  
Author(s):  
BRADLEY J. VIERRA ◽  
RICHARD I. FORD
Keyword(s):  
New Mexico ◽  
Rio Grande Valley ◽  
Rio Grande ◽  
Northern Rio Grande
Sign in / Sign up

Export Citation Format

Share Document