Silurian acastacean trilobites of the Americas

1993 ◽  
Vol 67 (4) ◽  
pp. 535-548 ◽  
Author(s):  
Gregory D. Edgecombe
Keyword(s):  
Minor Element ◽  
South American ◽  
A Minor ◽  
North And South

Species of the superfamily Acastacea constitute a minor element of North and South American Silurian trilobite faunas. Phacopidina? obsoleta (Ulrich and Delo) (Llandovery, Tennessee) provides the sole Silurian record of the “kloucekiine” grade (Acastacea s.l.); a lectotype is designated for this species. Acaste birminghamensis Norford (mid Llandovery, Alabama) lacks synapomorphies of post-Llandovery Acastidae s.s. (=Acastinae + “Acastavinae” + Asteropyginae), and is the basis for Llandovacaste n. gen. (Acastidae s.l.). A well-preserved sample of Andinacaste cf. A. ledgrandi Eldredge and Braniša from the Catavi Formation (Ludlow–Přídolí), Bolivia, displays apomorphic characters of the genal spines and hypostome shared with Devonian calmoniids. Coaptative structures, including vincular furrow/pits and “bifurcated” thoracic pleural tips, are documented for Andinacaste; similar enrollment morphologies arose in other acastomorph calmoniids. Poorly known Llandovery acastaceans from Paraguay and Venezuela may represent Andinacaste. Acaste zerinae n. sp. from the Pembroke Formation (Přídolí) of Maine is closely comparable to British late Wenlock A. downingiae (Murchison). The Australian Gedinnian acastine placed in Phacopinae indet. longisulcata (Shergold) is designated Acaste lokii n. sp.

SATOUMI APPROACH FOR REALIZING SUSTAINABLE COASTAL USE IN A RIASTYPE BAY: A CASE OF SHIZUGAWA BAY IN SANRIKU COAST HIT BY THE HUGE TSUNAMI ON 11 MARCH 2011

2017 ◽  
Author(s):  
Teruhisa Komatsu ◽  
Teruhisa Komatsu ◽  
Shuji Sasa ◽  
Shuji Sasa ◽  
Shigeru Montani ◽  
...  
Keyword(s):  
Local Governments ◽  
Minor Element ◽  
Coupling Model ◽  
Sanriku Coast ◽  
High Productivity ◽  
Biological Coupling ◽  
Miyagi Prefecture ◽  
Human Use ◽  
A Minor ◽  
Aquaculture Facilities

Rias-type bays are one of the most common coasts in Japan where aquacultures have been active due to sheltered geological shape with a deep bottom. The huge tsunami hit Sanriku Coast consisting of open rias-type bays near the epicenter facing Pacific Ocean on 11 March 2011. For recovering Sanriku Coast, it is important to include sustainability in its program. Satoumi is defined as the human use and management of coastal seas for high productivity while maintaining high biodiversity. Therefore, we proposed Satoumi approach to an open rias-type bay, Shizugawa Bay, in southern Sanriku Coast. We conducted scientific researches on mapping of coastal habitats and aquaculture facilities, hydrography, and material flows of nutrients, a minor element (Fe) and organic matters in the bay including those from the rivers and from the offshore waters. At the same time, Committee for Shizugawa Bay Management of Fishermen’s Cooperative of Miyagi Prefecture decided to decrease in aquaculture facilities for sustainable development of aquaculture. Based on these data, a physical-biological coupling model was used for calculating the number of aquaculture facilities that are suitable not only for yields but also for environments. These researches were established on strong collaborations among a fishermen’s’ cooperative, local governments and scientists. Results of this practice may help to realize sustainable coastal use of a rias-type bay.

RESOLVING SOURCE-TO-SINK DYNAMICS BY MULTI-PROXY DATA FROM THE NORTH AND SOUTH AMERICAN CONTINENTAL SEDIMENTARY ARCHIVES

2020 ◽  
Author(s):  
Barbara Carrapa ◽  
◽  
Andrea Stevens Goddard ◽  
Scott Meek ◽  
Peter G. DeCelles
Keyword(s):  
South American ◽  
Proxy Data ◽  
The North ◽  
Source To Sink ◽  
North And South

scholarly journals Chlorine as a Discriminant Element to Establish the Provenance of Central Mediterranean Obsidians

2020 ◽  
Vol 6 (1) ◽  
pp. 454-476
Author(s):  
Franco Foresta Martin ◽  
Silvio G. Rotolo ◽  
Manuela Nazzari ◽  
Maria Luisa Carapezza
Keyword(s):  
Electron Microprobe ◽  
Minor Element ◽  
Igneous Rocks ◽  
Chlorine Concentration ◽  
Silicate Melts ◽  
Alkali Content ◽  
Central Mediterranean ◽  
A Minor

Abstract Chlorine is a minor element present in obsidians in quantities greater than in average igneous rocks. The chlorine concentration in obsidians is generally low, of the order of tenths of wt %, but it exhibits an appreciable differentiation among geological sources. Despite these characteristics, chlorine has rarely been taken into consideration as a possible indicator of obsidian provenance and it does not appear in the chemical analytical tables accompanying the geochemical characterisation of obsidian samples. In this work, after an overview of chlorine geochemistry and cycle, we present thirty-one new electron microprobe (EPMA) analyses, including Cl, of geologic obsidians sampled from the four sources of the Central Mediterranean, exploited in prehistoric times (Monte Arci, Palmarola, Lipari and Pantelleria). The results are compared with 175 new EPMA analyses, including Cl, of archaeological obsidians already characterised in previous work and of known provenance. As such it was possible to ascertain that each source has a characteristic chlorine concentration, showing the utility of its use in the studies of obsidian provenance. Furthermore, given that the solubility of chlorine in silicate melts is correlated to its alkali content, in particular sodium, we assessed the efficacy of simple binary graphs Cl vs Na2O to better constrain the provenance of the obsidian samples.

Some North and South American Bees.

1927 ◽  
Vol 20 (3) ◽  
pp. 393-400
Author(s):  
T. D. A. Cockerell
Keyword(s):  
South American ◽  
North And South

scholarly journals Balance Differences between North and South American Older Adults: A Cross-Sectional, Age and Sex Matched Study

2021 ◽  
Author(s):  
Matheus Almeida Souza ◽  
Daniel Goble ◽  
Paige Arney ◽  
Edgar Ramos Vieira ◽  
Gabriela Silveira-Nunes ◽  
...  
Keyword(s):  
Older Adults ◽  
High Risk ◽  
North American ◽  
Force Plate ◽  
South American ◽  
Risk Of Falling ◽  
Men And Women ◽  
Falls Risk ◽  
South Americans ◽  
North And South

This study aimed to characterize the risk of falling in low, moderate and high risk participants from two different geographical locations using a portable force-plate. A sample of 390 older adults from South and North America were matched for age, sex, height and weight. All participants performed a standardized balance assessment using a force plate. Participants were classified in low, moderate and high risk of falling. No differences were observed between South and North American men, nor comparing North American men and women. South American women showed the significantly shorter center of pressure path length compared to other groups. The majority of the sample was categorized as having low risk of falling (male: 65.69 % and female: 61.87 %), with no differences between men and women. Also, no differences were found between North vs. South Americans, nor for falls risk levels when male and female groups were compared separately. In conclusion, South American women had better balance compatible with the status of the 50-59 years’ normative age-range. The prevalence of low falls risk was ~ 61-65 % and the prevalence of moderate to high risk was ~ 16-19 %. The frequency of fall risk did not differ significantly between North and South Americans, nor between males and females.

scholarly journals The Motive Of Crime In Foreign Law: A Comparative Legal Analysis

2019 ◽  
pp. 145-154
Author(s):  
Yu.V. Leka
Keyword(s):  
Legal Status ◽  
State Level ◽  
Minor Element ◽  
Legal Analysis ◽  
Foreign Countries ◽  
European Standards ◽  
Basic Approaches ◽  
A Minor ◽  
Criminal Legislation ◽  
Subjective Side

The article substantiates the need to carry out a comparative legal analysis of Ukrainian and foreign legislation on fixing the motive of the crime and its criminal- legal significance. Comparative analysis of the laws of foreign countries is made taking into account the membership of countries in the legal systems. The research of the legal status of the motive of crime in the legislation of foreign countries was carried out on the basis of consideration of basic acts of criminal legislation approved at the state level by the higher legislative bodies of a state. The analysis of various approaches to determining the motive of the crime based on the works of foreign and domestic scientists. On the basis of consideration of normative legal acts of criminal nature of foreign countries, the main terms, which indicate the motive of the crime are defined. The basic approaches of fixing the motive of crime in the legislation of foreign countries are defined and the ways of improvement of the Ukrainian legislation in this matter are proposed. It has been established that the legislation of some countries clearly traces the role of motive as a circumstance aggravating punishment and as a sign that must be taken into account directly in sentencing. In spite of this, most countries still hold a position of indifference to the motive of the crime, recognizing it as a minor element of the subjective side of the crime. It is established that the position of the Ukrainian legislator on the optionality of the sign of motive among other constituents of the subjective side of the crime and the obligatory sign among the elements of evidence in the criminal process is quite logical and justified. But many aspects related to the motive for the crime must be refined. Ukrainian legislation, including criminal law, become more progressive every year and meets European standards.

How can a minor element added to a binary amorphous alloy simultaneously improve the plasticity and glass-forming ability?

2013 ◽  
Vol 61 (17) ◽  
pp. 6597-6608 ◽  
Author(s):  
Hong-Kyu Kim ◽  
Mirim Lee ◽  
Kwang-Ryeol Lee ◽  
Jae-Chul Lee
Keyword(s):  
Amorphous Alloy ◽  
Minor Element ◽  
Glass Forming Ability ◽  
Glass Forming ◽  
A Minor

El Salvador's Civil War as Seen in North and South American Press

1986 ◽  
Vol 63 (2) ◽  
pp. 268-274 ◽  
Author(s):  
Walter C. Soderlund ◽  
Carmen Schmitt
Keyword(s):  
Civil War ◽  
South American ◽  
American Press ◽  
North And South
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