Results 101 to 110 of about 208,933 (390)

Integrated stratigraphy of the Upper Hauterivian to Lower Barremian Agua de la Mula Member of the Agrio Formation, Neuquén Basin, Argentina [PDF]

open access: yes, 2011
The Upper Hauterivian to Lower Barremian Agua de la Mula Member of the Agrio Formation (Neuquén Basin, Argentina) was studied applying an integrated stratigraphic approach and facies analysis.
Archuby, Fernando   +2 more
core  

Genetic Stratigraphy of Key Demographic Events in Arabia [PDF]

open access: yes, 2015
The issue of admixture in human populations is normally addressed by genome-wide (GW) studies, and several approaches have been developed to date admixture events [1,2,3,4,5].
Alshamali, Farida   +12 more
core   +3 more sources

Late Pleistocene to Holocene sedimentation in the Great Blue Hole (Lighthouse Reef, Belize): Results from a 30 m long core

open access: yesThe Depositional Record, EarlyView.
A 30 m long sedimentary succession at the bottom of the Belize Blue Hole represents terrestrial cenote (12.5–7.2 ka BP), restricted marine swamp (7.2–5.7 ka BP) and fully marine lagoonal phases (5.7–0 ka BP) on Lighthouse Reef carbonate platform. Post‐glacial and Holocene sea‐level rise largely controlled the sedimentological, faunal and floral changes
Eberhard Gischler   +12 more
wiley   +1 more source

Hotspots, trends, and regional focus on oil or gas exploration: A bibliometric comparative study

open access: yesDeep Underground Science and Engineering, EarlyView.
This paper explores the research trends in global oil and gas exploration through the bibliometric analysis of 3460 articles collected from the Web of Science database on oil and gas exploration published from 2013 to 2023. The research hotspots, objects, regional distribution, methods, and evaluation methods of oil and gas exploration are analyzed and
Jihong Wang   +3 more
wiley   +1 more source

Climate and biota of the early Paleogene: recent advances and new perspectives

open access: yesGeologica Acta, 2009
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V. PUJALTE   +2 more
doaj  

Non-invasive imaging of subsurface paint layers with optical coherence tomography [PDF]

open access: yes, 2007
Optical coherence tomography (OCT) systems are fast scanning infrared Michelson interferometers designed for the non-invasive examination of the interiors of the eye and subsurface structures of biological tissues.
Hughes, M   +5 more
core  

Revision of the age and stratigraphic relationships of Hinemaiaia Tephra and Whakatane Ash, North Island, New Zealand, using distal occurrences in organic deposits [PDF]

open access: yes, 1986
The stratigraphic and chronologic relationships of Hinemaiaia Tephra and Whakatane Ash are examined using distal tephras preserved in organic-rich deposits at five sites in eastern and northern North Island, New Zealand. A c.
Lowe, David J.
core   +2 more sources

Geological and geotechnical challenges on the Great Dyke of Zimbabwe and their impact on hardrock pillar design

open access: yesDeep Underground Science and Engineering, EarlyView.
The Great Dyke of Zimbabwe is notable for its rich platinum group metal deposits but poses significant geological and geotechnical challenges due to its complex rock types and structural features. Traditional pillar design methods are insufficient for addressing these complexities; the study suggests incorporating advanced techniques such as machine ...
Tawanda Zvarivadza   +3 more
wiley   +1 more source

Cretaceous rudists of Guatemala

open access: yesRevista Mexicana de Ciencias Geológicas, 2019
A small assemblage of rudists was described in the 1930´s from central Guatemala by MacGillavry and Mullerried… in order to continue, download the full paper in PDF.
Robert W. Scott
doaj  

A reevaluation of the late quaternary sedimentation in todos os Santos Bay (BA), Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2000
Todos os Santos Bay is a large ( 1000 km²), structurally controlled tidal bay in northeast Brazil. Three main drainage basins debouch into the bay, providing a mean freshwater discharge of 200 m³/s (prior to 1985), or less than 1% of the spring tidal ...
GUILHERME C. LESSA   +3 more
doaj   +1 more source

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