Results 31 to 40 of about 210,162 (311)

Geochemistry of trace and rare earth elements of the productive intrusions in the Kuh-Kapout porphyry copper deposit, Urumieh–Dokhtar magmatic arc [PDF]

open access: yesپترولوژی
IntroductionThe Cenozoic Urumieh-Dokhtar magmatic arc has characteristics similar to those of Andean-type magmatic arcs. Various types of magmatism occurred in this arc including calc-alkaline and K-rich calc-alkaline magmatism and less of them alkaline ...
Alireza Zarasvandi   +5 more
doaj   +1 more source

Automated collection of single species of microfossils using a deep learning–micromanipulator system

open access: yesProgress in Earth and Planetary Science, 2020
For geochemical analysis such as stable isotope ratio, radiocarbon dating and minor element analysis for a single species of microfossils, a large number of specimens, is required. Collecting specimens one by one under a microscope requires enormous time
Takuya Itaki   +5 more
doaj   +1 more source

Country Studies: A Team with No Coach? Problems of Composition, Methodology and Development

open access: yesКонтуры глобальных трансформаций: политика, экономика, право, 2022
The article raises and discusses six “provocative” questions about country studies in order to review, once more, its headings, facilities and, above all, its problems.
A. I. Treivish
doaj   +1 more source

Catherine Raisin, a role-model professional geologist [PDF]

open access: yes, 2003
This is a PDF version of an article published in Geology Today© 2003. The definitive version is available at www.blackwell-synergy.com. The illustrations have been removed.This article discusses the life and career of British geologist Catherine Raisin ...
Burek, Cynthia V.
core  

Evaluating the African arid corridor hypothesis: A meta‐analysis including the phylogenetic and biogeographical history of Sesamothamnus

open access: yesAmerican Journal of Botany, EarlyView.
Abstract Premise We examined the African arid corridor (AAC) disjunction pattern of vascular plants between northeastern and southwestern Africa in the context of geological and climatic events since the late Miocene. We developed a phylogenetic and biogeographical framework for the arid‐adapted genus Sesamothamnus (Pedaliaceae), a classic example of ...
John G. Zaborsky   +6 more
wiley   +1 more source

Airborne geophysical survey of part of Anglesey, North Wales [PDF]

open access: yes, 1979
An airborne magnetic, electromagnetic and radiometric survey was carried out over part of Anglesey, North Wales. In this report of the survey, an outline of the geology, with brief descriptions of survey techniques, data reduction and presentation are
Smith, I.F.
core  

A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing

open access: yesThe Anatomical Record, EarlyView.
Abstract The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytical methods and kinematic simulations of feeding functions in both modern and fossil mammals and their ...
Julia A. Schultz
wiley   +1 more source

Interim report on the ground-water resources of Manatee County, Florida [PDF]

open access: yes, 1955
A large part of western Manatee County is devoted to the growing of winter vegetables and citrus fruits. As in most of peninsular Florida, rainfall in the county during the growing season is not sufficient for crop production and large quantites of ...
Anders, Robert B., Peek, Harry M.
core  

Gridmapping the northern plains of Mars: Geomorphological, Radar and Water-Equivalent Hydrogen results from Arcadia Plantia [PDF]

open access: yes, 2019
A project of mapping ice-related landforms was undertaken to understand the role of sub-surface ice in the northern plains. This work is the first continuous regional mapping from CTX (“ConTeXt Camera”, 6 m/pixel; Malin et al., 2007) imagery in Arcadia ...
Balme, Matthew R.   +20 more
core   +3 more sources

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