Seamounts – characteristics, formation, mineral deposits and
... seamounts suggests that the Josephine Bank (north Atlantic) was perhaps the first identified seamount and in 1938, the term “seamount” was first officially given by the US Board of Geographic Names to the Davidson Seamount (Brewin et al., 2007). Until 1964, about 2000 seamounts had been discovered, ...
... seamounts suggests that the Josephine Bank (north Atlantic) was perhaps the first identified seamount and in 1938, the term “seamount” was first officially given by the US Board of Geographic Names to the Davidson Seamount (Brewin et al., 2007). Until 1964, about 2000 seamounts had been discovered, ...
South China Sea: Turning Reefs into Artificial Islands?
... smaller magnitude and did not involve the destruction of entire reef systems –as is being done now in the disputed waters of the South China Sea. ...
... smaller magnitude and did not involve the destruction of entire reef systems –as is being done now in the disputed waters of the South China Sea. ...
The Origin of Galapagos Island Seamounts and the Impact of Their
... Figure 1. Map of the Galapagos Islands and Galapagos spreading center showing the Cocos and Carnegie Ridges. From Feighner and Richards, 1994. Many techniques have been used to date the present emergent Galapagos islands. For many years, it was believed that the islands were very old, in order for t ...
... Figure 1. Map of the Galapagos Islands and Galapagos spreading center showing the Cocos and Carnegie Ridges. From Feighner and Richards, 1994. Many techniques have been used to date the present emergent Galapagos islands. For many years, it was believed that the islands were very old, in order for t ...
Origin of the Easter Submarine Alignment: morphology and
... ABSTRACT. The Easter submarine alignment corresponds to a sequence of seamounts and oceanic islands which runs from the Ahu-Umu volcanic fields in the west to its intersection with the Nazca Ridge in the east, with a total length of about 2.900 km and a strike of N85°E. Recent bathymetric compilatio ...
... ABSTRACT. The Easter submarine alignment corresponds to a sequence of seamounts and oceanic islands which runs from the Ahu-Umu volcanic fields in the west to its intersection with the Nazca Ridge in the east, with a total length of about 2.900 km and a strike of N85°E. Recent bathymetric compilatio ...
Microbiology of seaMouNts
... black smokers rich in sulfur to cooler, diffuse, iron-rich hydrothermal vents. As such, seamounts potentially represent hotspots of microbial diversity, yet our understanding of the microbiology of seamounts is still in its infancy. Here, we discuss recent work on the detection of seamount microbial ...
... black smokers rich in sulfur to cooler, diffuse, iron-rich hydrothermal vents. As such, seamounts potentially represent hotspots of microbial diversity, yet our understanding of the microbiology of seamounts is still in its infancy. Here, we discuss recent work on the detection of seamount microbial ...
Chapter 51. Biological Communities on Seamounts and Other
... support suspension feeding organisms, such as corals and sponges. Such currents also winnow away the sediment, providing hard substrate necessary for most suspension feeders to settle and attach. Depending on depth and current regime, the seamount benthos may be dominated by an invertebrate fauna ty ...
... support suspension feeding organisms, such as corals and sponges. Such currents also winnow away the sediment, providing hard substrate necessary for most suspension feeders to settle and attach. Depending on depth and current regime, the seamount benthos may be dominated by an invertebrate fauna ty ...
Mid-Atlantic Ridge/Charlie-Gibbs Fracture Zone
... Yes. Due to its relatively high faunal biomass and probably elevated pelagic productivity near the subpolar front, the area is of particular importance as a feeding area for marine mammals, such as blue, sei and sperm whales. The ridge structure is important for deep water sharks, its topographicall ...
... Yes. Due to its relatively high faunal biomass and probably elevated pelagic productivity near the subpolar front, the area is of particular importance as a feeding area for marine mammals, such as blue, sei and sperm whales. The ridge structure is important for deep water sharks, its topographicall ...
Text
... Seamounts – individual volcanoes on the ocean floor, they are distinct from the plate boundary volcanic system of the mid-ocean ridges because seamounts tend to by circular or conical (NOAA). Seamounts vary in size and those that breach the ocean’s surface are called oceanic islands, an example of t ...
... Seamounts – individual volcanoes on the ocean floor, they are distinct from the plate boundary volcanic system of the mid-ocean ridges because seamounts tend to by circular or conical (NOAA). Seamounts vary in size and those that breach the ocean’s surface are called oceanic islands, an example of t ...
Seamount Census Reveals New and Poorly Known Marine Life
... ocean’s mid-water fauna, the community of fishes, squid, and other organisms that hover in the water column midway between surface and seafloor. “Bottom life is generally better known than the stuff up in the water, because it’s easier to study an interface and things tend to concentrate there. We’v ...
... ocean’s mid-water fauna, the community of fishes, squid, and other organisms that hover in the water column midway between surface and seafloor. “Bottom life is generally better known than the stuff up in the water, because it’s easier to study an interface and things tend to concentrate there. We’v ...
EXPLOITATION PATTERNS IN SEAMOUNT FISHERIES: A
... Serious stock depletion on continental shelves helped create new pressure for alternative fishing grounds. In particular, seamounts were among those ‘newly’ targeted ecosystems that have been intensively fished since the second half of the 20th century. But what are the seamount fisheries? How have ...
... Serious stock depletion on continental shelves helped create new pressure for alternative fishing grounds. In particular, seamounts were among those ‘newly’ targeted ecosystems that have been intensively fished since the second half of the 20th century. But what are the seamount fisheries? How have ...
Hawaii Hotspot: Annotated Teacher Edition
... progressively older ages towards the NW. 4. Continue clicking on the age symbols for the next one or two seamounts towards the northwest beyond Kauai. Are these ages progressively younger or older than on the islands? The ages of the seamounts progressively increase to the NW. For example, at La ...
... progressively older ages towards the NW. 4. Continue clicking on the age symbols for the next one or two seamounts towards the northwest beyond Kauai. Are these ages progressively younger or older than on the islands? The ages of the seamounts progressively increase to the NW. For example, at La ...
full text here
... Seamounts are undersea mountains (usually of volcanic origin) rising from the seafloor and peaking below sea level (Duxbury and Duxbury 1989; Kennish 2000). Typically, seamounts are formed by volcanic activity over hotspots in the earth’s crust (Epp and Smoot 1989). Spreading of the sea floor away f ...
... Seamounts are undersea mountains (usually of volcanic origin) rising from the seafloor and peaking below sea level (Duxbury and Duxbury 1989; Kennish 2000). Typically, seamounts are formed by volcanic activity over hotspots in the earth’s crust (Epp and Smoot 1989). Spreading of the sea floor away f ...
Deep-Sea Biodiversity
... seamounts. The species diversity of islands depends on their area, distance to sources for colonising species, rates of species immigration and extinction and other factors. Thus, large differences in the species composition of seamount communities maybe found even on adjacent seamounts because of d ...
... seamounts. The species diversity of islands depends on their area, distance to sources for colonising species, rates of species immigration and extinction and other factors. Thus, large differences in the species composition of seamount communities maybe found even on adjacent seamounts because of d ...
Continental Margins & Ocean Basins
... Slope is gradual Mud waves & dunes form by strong ocean currents ...
... Slope is gradual Mud waves & dunes form by strong ocean currents ...
Earth Science Common Assessment #8
... bottom that are usually found near continents and on the seaward side of island chains. • The greatest known depth of any ocean is in the Challenger Deep of the Mariana Trench in the Pacific Ocean, about 250 miles southwest of the island of Guam. • It was discovered in 1951 by the British survey shi ...
... bottom that are usually found near continents and on the seaward side of island chains. • The greatest known depth of any ocean is in the Challenger Deep of the Mariana Trench in the Pacific Ocean, about 250 miles southwest of the island of Guam. • It was discovered in 1951 by the British survey shi ...
The Biology, Ecology and Vulnerability of Seamount Communities
... Distribution, geology and oceanography of seamounts Seamounts are undersea mountains that rise steeply from the seabed to waters below sea-level. Strictly, they are defined as having an elevation of more than 1000m and are of limited extent at the summit. However, even features of a few metres elev ...
... Distribution, geology and oceanography of seamounts Seamounts are undersea mountains that rise steeply from the seabed to waters below sea-level. Strictly, they are defined as having an elevation of more than 1000m and are of limited extent at the summit. However, even features of a few metres elev ...
Earth Science Common Assessment #8
... • A deep-sea trench is a narrow, elongate, v-shaped depression in the ocean floor. Trenches * are the deepest parts of the ocean, and the lowest points on Earth, reaching depths of nearly 7 mi below sea level. • These long, narrow, curving depressions can be thousands of miles in length, yet as litt ...
... • A deep-sea trench is a narrow, elongate, v-shaped depression in the ocean floor. Trenches * are the deepest parts of the ocean, and the lowest points on Earth, reaching depths of nearly 7 mi below sea level. • These long, narrow, curving depressions can be thousands of miles in length, yet as litt ...
Into the deep unknown – scientists embark on a mission to explore
... and breakfast’ for deep sea predators such as sharks, which often feed on seamount communities.” What threats are they facing? “The limited knowledge of species associated with seamounts that we have today indicates that many of them grow and reproduce slowly, which makes them particularly vulnerabl ...
... and breakfast’ for deep sea predators such as sharks, which often feed on seamount communities.” What threats are they facing? “The limited knowledge of species associated with seamounts that we have today indicates that many of them grow and reproduce slowly, which makes them particularly vulnerabl ...
oceans - TeacherWeb
... the South Pacific Ocean, is more than 35,000 feet (10,668 meters), or almost 6.6 miles (10.6 kilometers) deep. ...
... the South Pacific Ocean, is more than 35,000 feet (10,668 meters), or almost 6.6 miles (10.6 kilometers) deep. ...
The Seafloor
... Continuous, submarine mtn chain 80,000 km long rising an average of 23 km above the surrounding sea floor ...
... Continuous, submarine mtn chain 80,000 km long rising an average of 23 km above the surrounding sea floor ...
How Can Hot Spots Help Determine Rate and Direction of Plate
... Purpose: To use information about the formation and age of the Emperor Seamount and Hawaiian Island chain to determine the rate of movement of the Pacific Plate. Background: Most volcanoes form along divergent boundaries or near subduction zones; however, the Hawaiian Islands are examples of intra-p ...
... Purpose: To use information about the formation and age of the Emperor Seamount and Hawaiian Island chain to determine the rate of movement of the Pacific Plate. Background: Most volcanoes form along divergent boundaries or near subduction zones; however, the Hawaiian Islands are examples of intra-p ...
inferences on potential seamount locations from
... Seamounts are undersea mountains (usually of volcanic origin) rising from the seafloor and peaking below sea level (Duxbury and Duxbury, 1989; Kennish, 2000). Typically, seamounts are formed by volcanic activity over hotspots in the earth’s crust (Epp and Smoot, 1989). Spreading of the sea floor awa ...
... Seamounts are undersea mountains (usually of volcanic origin) rising from the seafloor and peaking below sea level (Duxbury and Duxbury, 1989; Kennish, 2000). Typically, seamounts are formed by volcanic activity over hotspots in the earth’s crust (Epp and Smoot, 1989). Spreading of the sea floor awa ...
Admiralty Seamount
... the ice barrier to sample some seamounts and abyssal plains to conclude the survey before returning to New Zealand. The aim is to compare biodiversity in the Scott Island seamount complex with that of the Balleny Islands Seamounts and the Admiralty Seamount to the west. Seamounts are essentially und ...
... the ice barrier to sample some seamounts and abyssal plains to conclude the survey before returning to New Zealand. The aim is to compare biodiversity in the Scott Island seamount complex with that of the Balleny Islands Seamounts and the Admiralty Seamount to the west. Seamounts are essentially und ...
document
... approximately 1,000 sq km. Azorean waters are dotted with seamounts and the islands are themselves were once seamounts, but have broken through the Atlantic waves. ...
... approximately 1,000 sq km. Azorean waters are dotted with seamounts and the islands are themselves were once seamounts, but have broken through the Atlantic waves. ...
Seamounts
... 1. Our analyses suggest that seamounts are hotspots of pelagic biodiversity, since they show consistently higher species richness than do shore or oceanic areas. 2. Moreover, our study indicates that higher species diversity is likely to occur within 30 to 40km of seamount summits. 3. This study als ...
... 1. Our analyses suggest that seamounts are hotspots of pelagic biodiversity, since they show consistently higher species richness than do shore or oceanic areas. 2. Moreover, our study indicates that higher species diversity is likely to occur within 30 to 40km of seamount summits. 3. This study als ...
Seamount
A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island. Seamounts are typically formed from extinct volcanoes that rise abruptly and are usually found rising from the seafloor to 1,000–4,000 metres (3,300–13,100 ft) in height. They are defined by oceanographers as independent features that rise to at least 1,000 metres (3,281 ft) above the seafloor, characteristically of conical form. The peaks are often found hundreds to thousands of meters below the surface, and are therefore considered to be within the deep sea. During their evolution over geologic time, the largest seamounts may reach the sea surface where wave action erodes the summit to form a flat surface. After they have subsided and sunk below the sea surface such flat-top seamounts are called ""guyots"" or ""tablemounts""A total of 9,951 seamounts and 283 guyots, covering a total area of 8,796,150 km2 have been mapped but only a few have been studied in detail by scientists. Seamounts and guyots are most abundant in the North Pacific Ocean, and follow a distinctive evolutionary pattern of eruption, build-up, subsidence and erosion. In recent years, several active seamounts have been observed, for example Loihi in the Hawaiian Islands.Because of their abundance, seamounts are one of the most common oceanic ecosystems in the world. Interactions between seamounts and underwater currents, as well as their elevated position in the water, attract plankton, corals, fish, and marine mammals alike. Their aggregational effect has been noted by the commercial fishing industry, and many seamounts support extensive fisheries. There are ongoing concerns on the negative impact of fishing on seamount ecosystems, and well-documented cases of stock decline, for example with the orange roughy (Hoplostethus atlanticus). 95% of ecological damage is done by bottom trawling, which scrapes whole ecosystems off seamounts.Because of their large numbers, many seamounts remain to be properly studied, and even mapped. Bathymetry and satellite altimetry are two technologies working to close the gap. There have been instances where naval vessels have collided with uncharted seamounts; for example, Muirfield Seamount is named after the ship that struck it in 1973. However, the greatest danger from seamounts are flank collapses; as they get older, extrusions seeping in the seamounts put pressure on their sides, causing landslides that have the potential to generate massive tsunamis.