نتایج جستجو برای: pillow lavas

تعداد نتایج: 1995  

2016
Sicong Ren Duo Wai-Chi Wong Hui Yang Yan Zhou Jin Lin Ming Zhang

BACKGROUND While appropriate pillow height is crucial to maintaining the quality of sleep and overall health, there are no universal, evidence-based guidelines for pillow design or selection. We aimed to evaluate the effect of pillow height on cranio-cervical pressure and cervical spine alignment. METHODS Ten healthy subjects (five males) aged 26 ± 3.6 years were recruited. The average height...

Journal: :PLoS Biology 2005

1512 normal enzyme. Then, they replaced the oxygen in question with a sulfur atom. The reaction didn’t work as well because, by the rules of chemistry, sulfur doesn’t like to bind to magnesium. But sulfur does like manganese and cadmium ions. So they replaced the magnesium with one of these other metal ions and measured the reaction. The researchers saw that these other metal ions restored (or ...

2015
Rebecca N. Greenberger John F. Mustard Edward A. Cloutis Paul Mann Janette H. Wilson Roberta L. Flemming Kevin M. Robertson Mark R. Salvatore Christopher S. Edwards

We investigate an outcrop of 187 Ma lacustrine pillow basalts of the Talcott Formation exposed in Meriden, Connecticut, USA, focusing on coordinated analyses of one pillow lava to characterize the aqueous history of these basalts in the Hartford Basin. This work uses a suite of multidisciplinary measurements, including hyperspectral imaging, other spectroscopic techniques, and chemical and mine...

Journal: :Journal of African Earth Sciences 2023

Late Ediacaran rocks of the Ouarzazate Group define a thin pile sediments and pyroclastic deposits between Paleoproterozoic basement Cambrian sedimentary cover in southern Kerdous Tagragra d’Akka inliers. In Tafeltast area, terrigenous with volcano-sedimentary are located grabens controlled by syn-sedimentary normal faults. The sedimentation is characterized maximum flooding outlined Agoujgal c...

2002
Hans Schouten Peter B. Kelemen

The lava section in the Troodos ophiolite, Cyprus, is chemically stratified and divided into a shallow lava sequence with low TiO2 content and a deeper lava sequence with high TiO2 content. We calculate the viscosity at magmatic temperature based on major element chemistry of lavas in Cyprus Crustal Drilling Project (CCSP) Holes CY-1 and 1A. We find that typical shallow low-Ti lavas have a magm...

1998
J. Immo Wendt Marcel Regelous Yaoling Niu Roger Hékinian Kenneth D. Collerson

Young intra-transform lavas erupted as a result of extension within the Garrett Transform Fault on the southern East Pacific Rise, are more porphyritic, less evolved, have lower concentrations of incompatible trace elements, and lower ratios of more incompatible to less incompatible elements (e.g. low K=Ti and La=Sm) compared to lavas from the adjacent East Pacific Rise ridge axis. Sr, Nd and P...

2004
J. M. Rhodes M. J. Vollinger

[1] This paper presents major and trace element compositions of lavas from the entire 3098 m stratigraphic section sampled by phase-2 of the Hawaii Scientific Drilling Project. The upper 245 m are lavas from Mauna Loa volcano, and the lower 2853 m are lavas and volcanoclastic rocks from Mauna Kea volcano. These intervals are inferred to represent about 100 ka and 400 ka respectively of the erup...

2003
H. C. SHETH J. J. MAHONEY A. N. BAXTER

Trace-element and Nd-Sr-Pb isotopic data for mafic lavas from the Mascarene island of Mauritius reveal that the shield-stage Older Series (with 143Nd/144Nd = 0.512827 to 0.512853, 87Sr/86Sr = 0.70412 to 0.70433, and 206Pb/204Pb = 18.771 to 19.024) is geochemically very similar to the shield-building lavas of the younger island of Réunion. The post-shield Intermediate and Younger Series lavas of...

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