Results 131 to 140 of about 155,947 (296)

Research advance for uranium isotope as a quantitative proxy for paleo-oceans anoxic or oxic environment

open access: yesCarsologica Sinica
Compared with other elements that are sensitive to redox environments (U, Mo, V, S, Fe, Cu, Zn, Ni), uranium isotopes have the advantage to quantitatively reflect long-term and global-scale paleoredox of oceans, due to its uniform composition in the ...
Qukan LUO   +7 more
doaj   +1 more source

The Unexpected Discovery of Paleocene? Coals in Outcrops Thought to Be Cambrian, Al Huqf, Oman

open access: yesJournal of Petroleum Geology, EarlyView.
ABSTRACT Two brown organic deposits were encountered whilst investigating kaolinitic claystones thought to occur at the base of a Cambrian formation at outcrop. The age of these organic deposits is probably Paleocene from palynology. Organic petrography shows that they are subbituminous coals with some oil source potential.
Mohammed H. Al Kindi   +4 more
wiley   +1 more source

Saint-Brice-sous-Forêt (Val-d’Oise). 89, rue de Paris

open access: yesArchéologie Médiévale, 2011
Nathalie Karst
doaj   +1 more source

Subsistence hunting shapes the spatial variation of jaguar densities in community‐managed forests

open access: yesJournal of Zoology, EarlyView.
Jaguars and people can coexist in community‐managed forests, but distance matters. In Guatemala's Maya Biosphere Reserve, jaguar numbers increased markedly in areas harder to reach on foot, yet jaguars were still found near communities, showing that responsibly managed forests can support jaguar populations while allowing people to maintain traditional
L. Perera‐Romero   +5 more
wiley   +1 more source

Mapping and assessment of karst landscape aesthetic value from a world heritage perspective: a case study of the Huangguoshu Scenic area

open access: yesHeritage Science
Aesthetic value is an essential component of outstanding universal value (OUV) for natural world heritage (NWH) site. However, comparisons of aesthetic value lack a set of effective evaluation systems.
Meng Zhang   +3 more
doaj   +1 more source

Saint-Brice-sous-Forêt (Val-d’Oise). Place de l’Église

open access: yesArchéologie Médiévale, 2011
Nathalie Karst
doaj   +1 more source

Advancements in ecological assets and ecological product supply: in-depth insights from Karst World Heritage sites

open access: yesHeritage Science
Ecological assets (EA) are fundamental to the supply of ecological products (EP). They underpin the provision of ecological functions by ecosystems, their existence, and health.
Qiangqiang Liu   +3 more
doaj   +1 more source

Karst flow system information from shape analysis and numerical modeling of tracer concentration curves [PDF]

open access: yes, 2016
Dye tracing constitute a very valuable tool for investigating the origin of groundwater and delineating flowpaths in karst media, providing direct and quantitative information about the hydraulic properties and solute transport dynamic within a conduit (
Andreo-Navarro, Bartolome   +2 more
core  

Ecological and genomic variation in ectomycorrhizal fungal exploration types

open access: yesNew Phytologist, EarlyView.
Summary Ectomycorrhizal fungi (EMF) produce mycelia with variable extension and complexity, which can be classified according to soil ‘exploration types’ (ETs). ETs have received attention as one of the few mycorrhizal trait frameworks, but without an empirical classification of ET functional diversity and environmental preferences, understanding and ...
Thomas M. Mansfield   +55 more
wiley   +1 more source

Montmorency (Val-d’Oise). Place au Pain

open access: yesArchéologie Médiévale, 2005
Nathalie Karst
doaj   +1 more source

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