|
Von Damm Vent Field
The Von Damm Hydrothermal Field is a field of hydrothermal vents located just south of Grand Cayman in the Caribbean, on the Mid-Cayman Rise in the Cayman Trough. It is approximately south of the Beebe Hydrothermal Vent Field, Beebe Vent Field. The vent field is named in commemoration of geochemical oceanographer Karen Von Damm, who died in 2008. Von Damm is situated a depth of approximately below sea level, situating it within the Bathyal zone with the majority of other hydrothermal vent fields. The hydrothermal plume "Von Damm" was detected in 2010, with the site being visually confirmed later that year. Von Damm is of particular interest due to its location atop an ocean core complex associated with the Mid-Cayman spreading center. This exposes potential ultramafic rocks to seawater, hosting geochemical reactions unique to those of Beebe nearby and potentially similar to those of the Lost City Hydrothermal Field, Lost City Field. By some, Von Damm is considered a new class ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mid-Cayman Rise
The Mid-Cayman Rise or Mid-Cayman Spreading Center is a relatively short (110 km long) divergent plate boundary in the middle of the Cayman Trough. It forms part of a dominantly transform boundary that is part of the southern margin to the North American Plate. It is an ultra-slow spreading center with an opening rate of 15–17 mm per year. Formation The Mid-Cayman Rise developed during the Eocene when the northern part of the Caribbean Plate collided with the Bahamas Platform, forcing the southern boundary to propagate southwards. This boundary initially formed as two strike-slip faults with a large left-stepping offset between them, generating a pull-apart basin. Continuing movement on the boundary and extension within the pull-apart led to the formation of an area of oceanic crust containing a north-south trending spreading center that remains active to the present day. When the spreading center formed, all the displacement on the Swan Islands Transform Fault was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gabbro
Gabbro () is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is chemically equivalent to rapid-cooling, fine-grained basalt. Much of the Earth's oceanic crust is made of gabbro, formed at mid-ocean ridges. Gabbro is also found as plutons associated with continental volcanism. Due to its variant nature, the term ''gabbro'' may be applied loosely to a wide range of intrusive rocks, many of which are merely "gabbroic". By rough analogy, gabbro is to basalt as granite is to rhyolite. Etymology The term "gabbro" was used in the 1760s to name a set of rock types that were found in the ophiolites of the Apennine Mountains in Italy. It was named after Gabbro, a hamlet near Rosignano Marittimo in Tuscany. Then, in 1809, the German geologist Christian Leopold von Buch used the term more restrictively in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RV Okeanos Explorer
USNS ''Capable'' (T-AGOS-16) was a ''Stalwart''-class modified tactical auxiliary general ocean surveillance ship of the United States Navy in service from 1989 to 2004. In 2008, she was commissioned into service in the National Oceanic and Atmospheric Administration as the oceanographic research ship NOAAS ''Okeanos Explorer'' (R 337). Construction ''Capable'' was laid down by VT Halter Marine, Inc., at Moss Point, Mississippi, on 17 October 1987. She was launched on 28 October 1988 and delivered to the U.S. Navy on 9 June 1989. U.S. Navy service The U.S. Navy placed the ship upon delivery in non-commissioned service with the Military Sealift Command as the United States Naval Ship USNS ''Capable'' (T-AGOS-16). Designed to collect underwater acoustical data in support of anti-submarine warfare operations, ''Capable'' spent the final years of the Cold War towing Surveillance Towed Array Sensor System (SURTASS) sonar equipment to hunt for Soviet Navy submarines. She operat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlantis Massif
The Atlantis Massif is a prominent undersea massif in the North Atlantic Ocean. It is a dome-shaped region approximately across and rising about from the sea floor. It is located at approximately 30°8′N latitude 42°8′W longitude; just east of the intersection of the Mid-Atlantic Ridge with the Atlantis Transform Fault. The highest point of the massif is around beneath the surface. Description It is believed that the massif was formed underneath the nearby Mid-Atlantic Ridge, but pulled from underneath the ridge during the movement of the plates, about 1.5 to 2 million years ago. Geologic studies of the massif have indicated that it is not composed of the black basalt typical of the ocean floor, but rather of dense green peridotite usually found in the mantle. The central dome is corrugated and striated in a way that is representative of an exposed ultramafic Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are ign ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Methanothermococcus
In taxonomy, ''Methanothermococcus'' is a genus of the Methanococcaceae. The cells are shaped like irregular bars and tend to be Gram-negative. They are mobile via polar flagella. They require acetate An acetate is a salt formed by the combination of acetic acid with a base (e.g. alkaline, earthy, metallic, nonmetallic or radical base). "Acetate" also describes the conjugate base or ion (specifically, the negatively charged ion called ... to grow. References Further reading Scientific journals * * Scientific books * Scientific databases External links Archaea genera Euryarchaeota {{Euryarchaeota-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfurovum ''Sulfurovum'' is a genus within the ''Campylobacterota Campylobacterota are a phylum of bacteria. All species of this phylum are Gram-negative. The Campylobacterota consist of few known genera, mainly the curved to spirilloid '' Wolinella'' spp., '' Helicobacter'' spp., and ''Campylobacter'' spp. Mo ...'' which was first described in 2004 with the isolation and description of the type species ''Sulfurovum lithotrophicum'' from Okinawa trough hydrothermal sediments. Named for their ability to oxidize sulfur and their egg-like shape, cells are gram-negative, coccoid to short rods. Mesophilic chemolithoautotrophic growth occurs by oxidation of sulfur compounds coupled to the reduction of nitrate or molecular oxygen. References Bacteria genera Campylobacterota {{Campylobacterota-stub ... [...More Info...] [...Related Items...] |
