Results 71 to 80 of about 285,536 (204)

Microfacies, depositional environment and carbonate association of the Asmari Formation in Tang-e-Gojestan [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches
The Asmari Formation was logged and sampled in the Tang-e-Gojestan stratigraphic section (Eshgar Anticline, Izeh Zone) to study microfacies, depositional environment and carbonate associations. The Asmari Formation with 298 m-thickness mainly consists of
Yadolah Ezampanah, Mohammad Goodarzi
doaj   +1 more source

Illusion of Motion: Variation of Subjective Value of Travel Time on Freeways and Ramp Meters [PDF]

open access: yes
This paper explores drivers' subjective value of time under moving and stopped freeway travel conditions using a stated preference survey. Unlike previous studies that assume a constant value of time, this research relates perceived satisfaction of a ...
Feng xie, Lei Zhang, David Levinson
core  

The skeletal carbonate contribution to mixed terrigenous-carbonate sediments on the temperate northeastern Northland continental shelf, New Zealand [PDF]

open access: yes, 2012
The northeastern Northland continental shelf (NNCS) includes the coastal, shelf and uppermost slope seafloor out to depths of 210 m and over a distance of 150 km between North Cape and Ngurauru Bay slightly north of Whangarei. The nature of the surficial
Rogers, Danielle Claire
core  

Sequence lithofacies paleogeography evolution of the Middle Permian Maokou Formation in the northwest margin of the Sichuan Basin

open access: yesFrontiers in Earth Science
Due to the present tectonic and stratigraphic distribution characteristics in the northwest margin of the Sichuan Basin are complex, which restricts the understanding of sequence lithofacies paleogeography of the Middle Permian Maokou Formation.
Wenjie Yang   +12 more
doaj   +1 more source

Factors Controlling Oncoid Distribution in the Inner Areas of a Late Kimmeridgian Carbonate Ramp (Northeast Spain)

open access: yes, 2019
The factors controlling the oncoid distribution in the interior areas of a latest Kimmeridgian shallow carbonate ramp were examined based on a detailed sedimentological and petrographic analysis of the upper sequence of the Higueruelas Formation (Iberian
Sequero López, Cristina   +5 more
core   +1 more source

Microfacies Analysis and diagenesis process of Hartha Formation East Baghdad oilfield, center Iraq

open access: yesAcademic Science Journal
This study focused on interpreting the carbonate microfacies of Hartha Formation and the impact of diagenesis processes in selected wells of East Baghdad oil field. A total of 33 thin sections were examined from cutting and core samples.
Afnan Munther   +1 more
doaj   +1 more source

Tubular carbonate concretions as hydrocarbon migration pathways? Examples from North Island, New Zealand [PDF]

open access: yes, 2006
Cold seep carbonate deposits are associated with the development on the sea floor of distinctive chemosyn¬thetic animal communities and carbonate minerali¬sation as a consequence of microbially mediated anaerobic oxidation of methane.
Nelson, Campbell S.   +7 more
core  

Lithostratigraphy of the Portfjeld Group (Ediacaran – lowermost Cambrian) of North Greenland

open access: yesGEUS Bulletin
The Portfjeld Formation, as originally defined, is the lowermost lithostratigraphic unit of the mainly Lower Palaeozoic Franklinian Basin in southern Peary Land, central North Greenland.
Jon R. Ineson   +5 more
doaj   +1 more source

Buying into the Bypass: Allowing Trucks to pay to use the Ramp Meter Bypasses [PDF]

open access: yes
People make their route choices based on the delays they experience but not on the delays they impose on others. Moreover different travelers have different values of time.
Satya Muthuswamy, David Levinson
core  

Depositional environments along a carbonate ramp to slope transition in the Silurian of Washington Land, North Greenland

open access: yes, 1983
During the earliest Silurian, subsidence and tilting of a relatively flat carbonate platform produced a homoclinal carbonate ramp transitional to the slope of a deep-water basin.
John M. Hurst, Finn Surlyk
core   +1 more source

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