Results 71 to 80 of about 17,155 (186)

An Experimental Approach on Pearl Shell (Pinctada margaritifera) for a Microwear Study of Shell Artefacts From French Polynesia

Archaeometry, EarlyView.
ABSTRACT Pinctada margaritifera (black‐lipped pearl oyster) artefacts are ubiquitous in the archaeological record throughout the Pacific and particularly in Polynesia. Despite efforts towards the development of typologies, the lack of microwear and use‐wear studies has prevented the development of technological approaches. We used 20 pearl shell valves
Jemma McGloin, Sofia Samper‐Carro, Guillaume Molle   +2 more
wiley   +1 more source

SC‐550: A Sintered Calcite Reference Material for In Situ U‐Pb Geochronology

Geostandards and Geoanalytical Research, EarlyView.
Key Points New calcite reference material (SC‐550) produced by high‐temperature and high‐pressure sintering of nano‐particulate powder from a microbial limestone. Homogeneous U content (2.3 ± 0.4 μg g‐1) and U‐Pb isotope ratios (< 0.6% RSD for 207Pb/206Pb; < 3% RSD for 238U/206Pb).
Lorenzo Tavazzani, Nico Kueter, Dawid Szymanowski, Felix Marxer, Ismay Vénice Akker, Marcel Guillong, Massimo Chiaradia, Yannick Buret   +7 more
wiley   +1 more source

Resilience of Atlantic Slippersnail Crepidula fornicata Larvae in the Face of Severe Coastal Acidification

Frontiers in Marine Science, 2018
Globally, average oceanic pH is dropping, and it will continue to decline into the foreseeable future. This ocean acidification (OA) will exacerbate the natural fluctuations in pH that nearshore ecosystems currently experience daily, potentially pushing ...
Nicola G. Kriefall, Jan A. Pechenik, Anthony Pires, Sarah W. Davies   +3 more
doaj   +1 more source

The Greenland–Scotland Ridge in a Changing Ocean: Time to Act?

Marine Ecology, EarlyView.
ABSTRACT The Greenland–Scotland Ridge is a submarine mountain that rises up to 500 m below the sea surface and extends from the east coast of Greenland to the continental shelf of Iceland and across the Faroe Islands to Scotland. The ridge not only separates deeper ocean basins on either side, that is, the North Atlantic and Arctic oceans, but also ...
Christophe Pampoulie, Saskia Brix, Haseeb S. Randhawa   +2 more
wiley   +1 more source

Oxygen isotope thermometry and composition of aqueous fluids within the parent body of asteroid (101955) Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report on the petrography and oxygen isotopic compositions from in situ analyses of carbonates (Ca‐carbonate, dolomite, and Fe‐rich magnesite), magnetite, and apatite in particles from asteroid Bennu. Using oxygen isotope thermometry of Ca‐carbonate, dolomite, and magnetite, we estimated crystallization temperatures and the oxygen isotopic ...
Gary R. Huss, Kazuhide Nagashima, Elena Dobrică, Alexander N. Krot, Gregory Cane, Zoe E. Wilbur, Timothy J. McCoy, Catherine M. Corrigan, Sara S. Russell, Jessica J. Barnes, Ann N. Nguyen, Harold C. Connolly Jr., Dante S. Lauretta   +12 more
wiley   +1 more source

Aragonite mineralogy.

, 2012
X-ray powder diffraction pattern of (A) tissue culture sample and (B) and of a powdered mother colony skeleton showing the characteristic diffraction peaks of aragonite.
Tali Mass (103384), Oscar M. E. Schofield (171320), Jeana L. Drake (171307), Robert M. Sherrell (171322), Liti Haramaty (171312), Paul G. Falkowski (171324), Yair Rosenthal (171317)   +6 more
core   +1 more source

Sustainable Aragonite Production from Lime Feedstock Using Continuous Mineral Carbonation System and Seawater as a Natural Chemical Inducer

Applied Sciences
Conventional production methods of aragonite production utilize chemical inducers to promote the evolution of the calcite crystalline phase to the aragonite phase of calcium carbonate. The chemical inducers used require a considerable amount of magnesium
Mohammad Ghaddaffi Mohd Noh, Nor Yuliana Yuhana, Mohammad Hafizuddin Hj Jumali, Mohammad Syazwan Onn, Ruzilah Sanum   +4 more
doaj   +1 more source

Mesophotic octocoral larval settlement preferences and behaviors

Restoration Ecology, EarlyView.
Abstract Introduction Lab‐based coral reproduction is advancing restoration efforts to support coral populations injured by the 2010 Deepwater Horizon oil spill. Objectives This study aimed to answer foundational questions concerning coral spawning and larval settlement that need to be resolved for these mesophotic and deep‐sea coral species before ...
Mark McCauley, Julia Johnstone, William G. Jenkins, Jayci Grosso, Arielle Pollock, Jonathan M. Quigley, Leigh‐Anne Carlson, Christopher L. Gardner, Peter J. Etnoyer, Kristopher G. Benson, Amanda W. J. Demopoulos   +10 more
wiley   +1 more source

Effect of carbonate chemistry alteration on the early embryonic development of the pacific pyster (Crassostrea gigas) [PDF]

, 2011
Ocean acidification, due to anthropogenic CO(2) absorption by the ocean, may have profound impacts on marine biota. Calcareous organisms are expected to be particularly sensitive due to the decreasing availability of carbonate ions driven by decreasing ...
Heip, Carlo H. R., Greaves, Mervyn, Jack J Middelburg, Gattuso, J.P., Greaves, M., Frédéric Gazeau, Jan Peene, Gazeau, F., Gazeau, Frédéric, Jack J. Middelburg, Middelburg, Jack J., Heip, Carlo, Middelburg Jack J., Middelburg, Jack, Elderfield Henry, Peene, J., Peene Jan, Elderfield, H., Mervyn Greaves, Middelburg, J.J., Gazeau Frédéric, Carlo H. R. Heip, Gattuso, Jean-Pierre, Heip Carlo H. R., Gattuso Jean-Pierre, Elderfield, Henry, Jean-Pierre Gattuso, Henry Elderfield, Carlo H R Heip, Peene, Jan, Gattuso, J.-P., Gazeau, F.P.H., Greaves Mervyn, Heip, C.H.R.   +33 more
core   +4 more sources

Biogeochemical Reconstruction of Authigenic Carbonate Deposits at Methane Seep Site off Krishna‐Godavari (K‐G) Basin, Bay of Bengal

Geochemistry, Geophysics, Geosystems
Active and relic marine methane‐seep sites are widely distributed globally and are distinguished by distinctive geology, biogeochemistry, and ecosystems.
S. P. K. Pillutla, A. Peketi, A. Mazumdar, Mohd. Sadique, K. Sivan, Anjali Zatale, S. Mishra, Swati Verma   +7 more
doaj   +1 more source