Results 131 to 140 of about 14,842 (259)

Agriopleura Morphotypes of the Lower Aptian Shu’aiba Formation of Saudi Arabia [PDF]

open access: yes, 2003
The Shu’aiba Formation of the Arabian Platform consists of Aptian carbonates in which rudists are important biocomponents. It is an important hydrocarbon reservoir.
G.W Hughes
core   +1 more source

Molecular study of lipids in humic acids by sequential chemical degradation [PDF]

open access: yes, 2009
Lipidy v půdě vykazují poměrně vysokou resistenci k biodegradaci, mohou proto tak zajistit informace o zdrojích organické hmoty a diagenetických procesech. Půdní organická hmota je vysoce heterogenní a vyskytují se v ní různé dynamické systémy.
Bachratá, Radka
core  

Les ensembles céramiques du Bassin de Murzuq: une contribution de l'archéologie préventive à la connaissance du Messak

open access: yes, 2008
International audienceThe analysis of the ceramic remains found during pre-ventive archaeological operations carried out from 1999 to 2005 in the Murzuq basin allows an archaeological foundation to be given to the history of the human occu-pation of the ...
Gallin, Annabelle   +1 more
core   +2 more sources

COPROLITOS DE CAMÉLIDOS DEL HOLOCENO COMO INDICADORES PALEOAMBIENTALES CAMELID COPROLITES FROM THE HOLOCENE AS PALEOENVIRONMENTAL INDICATORS

open access: yesMagallania, 2010
El estudio de coprolitos permite abordar aspectos ecológicos y culturales de poblaciones pasadas, como reconstrucciones del paleoambiente, de paleodietas, inferir estacionalidad en el uso de los recursos y situaciones de parasitismo.
NADIA J VELÁZQUEZ   +3 more
doaj  

Combustion Completeness and Sample Location Determine Wildfire Ash Leachate Chemistry

open access: yesGeochemistry, Geophysics, Geosystems
Understanding past fire regimes and how they vary with climate, human activity, and vegetation patterns is fundamental to the mitigation and management of changing fire regimes as anthropogenic climate change progresses.
Micheline Campbell   +7 more
doaj   +1 more source

Preface [PDF]

open access: yes, 2005
Kölb-Ebert, Martina, Werner, Winfried
core   +1 more source

La sédimentation lacustre indicateur de changements des paléoenvironnements au cours des 30 000 dernières années (Carajas, Amazonie, Brésil) [PDF]

open access: yes, 1994
Les résultats de l'analyse par spectrométrie infrarouge des échantillons de deux carottes prélevées dans deux dépressions marécageuses de la Serra Sul dos Carajas (Amazonie Orientale), mettent en évidence cinq grandes étapes paléohydrologiques au cours ...
Fournier, Marc   +8 more
core  

Correction: Correlates of Vocal Tract Evolution in Late Pliocene and Pleistocene Hominins. [PDF]

open access: yesHum Nat
Ekström AG   +9 more
europepmc   +1 more source

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