Results 91 to 100 of about 6,547 (194)

Isotopic niche variability in macroconsumers of the East Scotia Ridge (Southern Ocean) hydrothermal vents: What more can we learn from an ellipse? [PDF]

, 2016
Aspects of between-individual trophic niche width can be explored through the isotopic niche concept. In many cases isotopic variability can be influenced by the scale of sampling and biological characteristics including body size or sex.
McGill, R.A.R., Polunin, N.V.C., Reid, W.D.K., Sweeting, C.J., Wigham, B.D.   +4 more
core   +2 more sources

Plate Puzzle [PDF]

This activity was designed to help students develop a better understanding of the Earth's plates and their distribution. They will explore plate motions and the interactions of the plates along the plate boundaries by re-assembling a map of the earth ...
Larry Braile, Sheryl Braile
core   +1 more source

Anaerobic oxidation of short-chain alkanes in hydrothermal sediments: potential influences on sulfur cycling and microbial diversity

Frontiers in Microbiology, 2013
Short-chain alkanes play a substantial role in carbon and sulfur cycling at hydrocarbon-rich environments globally, yet few studies have examined the metabolism of ethane (C2), propane (C3), and butane (C4) in anoxic sediments in contrast to methane (C1).
Melissa M Adams, Adrienne L Hoarfrost, Arpita eBose, Samantha B Joye, Peter R Girguis   +4 more
doaj   +1 more source

The Life and Death of a Tectonic Plate: Imaging the Juan de Fuca Plate with Amphibious Seismic Data [PDF]

, 2019
Understanding of Earth’s evolution has been hindered, in part, by the technical challenges associated with placing seismic instruments on the seafloor. As technology improves, more arrays of ocean bottom seismometers are being deployed around the ocean ...
Hawley, William Bythewood
core  

Gabbroic xenoliths and host ferrobasalt from the southern Juan de Fuca Ridge

Journal of Geophysical Research: Solid Earth, 1986
Rare isotropic gabbroic xenoliths occur in sheet and lobate flow fragments of nearly aphyric ferrobasalt collected along a 12‐km section of the southern Juan de Fuca Ridge. Xenoliths comprise ≪ 1% of the dredge contents and range in size from 1 cm3 (glomerocryst) to 240 cm3.
Dixon, Jacqueline Eaby, Clague, David A., Eissen, Jean‐Philippe   +2 more
openaire   +4 more sources

Seismic potential associated with subduction in the northwestern United States [PDF]

, 1984
Despite good evidence of present-day convergence of the Juan de Fuca and North American plates, there has been remarkably little historical seismic activity along the shallow part of the Juan de Fuca subduction zone.
Heaton, Thomas H., Kanamori, Hiroo
core  

Co-registered Geochemistry and Metatranscriptomics Reveal Unexpected Distributions of Microbial Activity within a Hydrothermal Vent Field

Frontiers in Microbiology, 2017
Despite years of research into microbial activity at diffuse flow hydrothermal vents, the extent of microbial niche diversity in these settings is not known. To better understand the relationship between microbial activity and the associated physical and
Heather C. Olins, Daniel R. Rogers, Christina Preston, William Ussler, Douglas Pargett, Scott Jensen, Brent Roman, James M. Birch, Christopher A. Scholin, M. Fauzi Haroon, Peter R. Girguis   +10 more
doaj   +1 more source

Marine Magnetic Anomalies Enhanced by Internal Stress in Rapidly Cooled Submarine Basalts

Geophysical Research Letters
Marine magnetic anomalies are pivotal to our understanding of plate tectonics, geomagnetic fields, and deep Earth dynamics. However, the question of how Ti‐rich titanomagnetites, the primary remanence carriers in oceanic crust rocks, can faithfully ...
Fei Han, Huapei Wang, Yiliang Lv, Greig A. Paterson, Andrew J. Biggin, Wyn Williams, Tao Yang, Junxiang Miao, Ting Cao, Duowen Zhu, Chen Wen, Shaochen Hu, Xiaowei Chen, Mengqing Wang, Yiming Ma, Jiakun Fang, Jiabo Liu   +16 more
doaj   +1 more source

Beyond the ocean frontier: the Juan de Fuca Ridge

, 1986
Two thousand metres below the surface of the Pacific Ocean off Canada's west coast is an underwater mountain range called the Juan de Fuca Ridge. Its steaming vents spew forth an abundance of molten minerals, supporting a unique ecosystem denied the privileges of light.
openaire   +1 more source

Petrogenesis of Plagioclase Ultraphyric Basalts (PUB) From the Northeastern (NE) Pacific Ridge System: Evidence From Mineral Textures and Geochemical Characteristics

Geochemistry, Geophysics, Geosystems
Plagioclase crystals in plagioclase ultraphyric basalts (PUB) record changes in the major, trace, and isotopic compositions of evolving magmas. Those changes represent the record of specific processes in the crust and upper mantle that impart distinct ...
John B. Hewitt, Gokce K. Ustunisik, Roger L. Nielsen   +2 more
doaj   +1 more source