Results 21 to 30 of about 219,855 (355)

Some new ichnospecies stored in the Geological Department of the National Museum of Natural History, NAS of Ukraine

open access: yesGeo&Bio, 2021
During the last decades, many scientists worldwide have focused on the study of activity signs of animals. Such signs of various animals have appeared in the geological history since Ediacaran rocks and can be found until today.
Volodymyr Grytsenko
doaj   +1 more source

Controls of depositional facies and diagenetic processes on reservoir quality of the Arab Formation in the one oil field, Southern Persian Gulf [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2021
The Late Jurassic Arab Formation is one of the main oil reservoirs in the Middle East. To investigate  factors reservoir quality controlling, the integration of the results from geological and petrophysical data was utilized.
Ali Asaadi   +3 more
doaj   +1 more source

Cyanobacterial Diversity in Microbial Mats from the Hypersaline Lagoon System of Araruama, Brazil: An In-depth Polyphasic Study

open access: yesFrontiers in Microbiology, 2017
Microbial mats are complex, micro-scale ecosystems that can be found in a wide range of environments. In the top layer of photosynthetic mats from hypersaline environments, a large diversity of cyanobacteria typically predominates.
Vitor M. C. Ramos   +10 more
doaj   +1 more source

Grain textural analysis across a range of glacial facies [PDF]

open access: yes, 1999
A technique proposed by Hooke and Iverson (1995) to identify deformed subglacial sediments is reviewed and tested, based on two main objectives. First, an investigation of whether the fractal dimension can distinguish between non-deformed and deformed ...
Hart, JK, Khatwa, A, Payne, AJ
core   +2 more sources

Origin and significance of 'dispersed facies' basal ice: Svínafellsjökull, Iceland [PDF]

open access: yes, 2010
Dispersed facies basal ice - massive (i.e. structureless) ice with dispersed debris aggregates - is present at the margins of many glaciers and, as a product of internal glacial processes, has the potential to provide important information about the ...
Darrel A. Swift   +10 more
core   +3 more sources

Use of Anemometric Results and Threshold Velocities for Determination of Proper Regions Where Sand Storms are Generated (Case Study: Around the Synoptic Station of Yazd) [PDF]

open access: yesDesert, 2012
In order to recognize the wind erosion situation of a region, the survey of its windiness is not sufficient and the physical characteristics of earth are of importance too.
H. Ahmadi   +2 more
doaj   +1 more source

An updated stratigraphic and environmental framework for the distribution of Silurian vertebrates on Gotland [PDF]

open access: yesEstonian Journal of Earth Sciences, 2015
In this work, previously published occurrences of vertebrates from the latest Llandovery to end-Ludlow successions of Gotland, Sweden, are gathered and summarized in an updated stratigraphic framework, which also incorporates facies differences of ...
Oskar Bremer, Henning Blom
doaj   +1 more source

Environmental controls on the distribution of neoselachian sharks and rays within the British Bathonian (Middle Jurassic). [PDF]

open access: yes, 2003
Extensive sampling from a range of facies within the Bathonian (Middle Jurassic) of southern England has allowed the palaeoenvironmental distribution of a number of taxa of neoselachian sharks and rays to be assessed.
Underwood, Charlie J.
core   +1 more source

Tidal flat deposits of the Lower Proterozoic Campbell Group along the southwestern margin of the Kaapvaal Craton, Northern Cape Province, South Africa [PDF]

open access: yes, 1991
Lower Proterozoic stromatolites and associated clastic carbonate deposits of the Campbell Group, from the southern margin (Prieska area) of the Kaapvaal Craton, northern Cape Province, are described.
Aigner   +66 more
core   +1 more source

Evolusi Bentuklahan daerah Manado dan sekitarnya, Sulawesi Utara

open access: yesIndonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol4no2.20096Landform evolusion in Manado region has been strongly influenced by tectonic activities beside marine and volcanic ones.
S. Poedjoprajitno
doaj   +1 more source

Home - About - Disclaimer - Privacy