Occurrence of interstratified glauconite-montmorillonoid pellets, Queen Charlotte Sound, British Columbia

1968 ◽  
Vol 5 (2) ◽  
pp. 243-247 ◽  
Author(s):  
J. W. Murray ◽  
E. E. Mackintosh
Keyword(s):  
British Columbia ◽  
Continental Shelf ◽  
Bottom Sediments ◽  
Clay Fraction ◽  
Heat Treatments ◽  
Sea Floor ◽  
Diffuse Peak

'Glauconite pellets', discovered in the bottom sediments of the Queen Charlotte Sound on the British Columbia continental shelf, consist of interstratified glauconite-montmorillonoid and kaolin. Expansion of the interstratified material to form a broad diffuse peak on glyceration reflects the presence of the montmorillonoid component. Potassium saturation followed by a series of heat treatments produced an asymmetrical 9.94 Å peak. The clay fraction associated with the 'glauconite pellets' was composed of predominantly montmorillonoid with lesser amounts of kaolin and chlorite. These 'glauconite pellets' may be either residual (eroded out of outcrops on the sea floor), relic Pleistocene, or Recent. It is suspected, regardless of the time of formation, that this particular glauconite formed diagenetically from montmorillonoid by adsorption of potassium in interlamellar positions and possibly some substitution of magnesium and iron for aluminum in octahedral positions.

Bottom sediments on the continental shelf off the northeastern United States-- Cape Cod to Cape Ann, Massachusetts

1971 ◽  
Author(s):  
John Schlee ◽  
David W. Stevens Folger ◽  
Charles J. O'Hara
Keyword(s):  
United States ◽  
Continental Shelf ◽  
Bottom Sediments ◽  
Cape Cod ◽  
Northeastern United States

A mammoth (Mammuthus primigenius) tooth from late Wisconsin deposits near Embden, North Dakota, and comments on the distribution of woolly mammoths south of the Wisconsin ice sheets

1986 ◽  
Vol 23 (7) ◽  
pp. 909-918 ◽  
Author(s):  
C. R. Harington ◽  
Allan C. Ashworth
Keyword(s):  
British Columbia ◽  
Continental Shelf ◽  
North Dakota ◽  
Third Molar ◽  
Ice Sheets ◽  
Lake Agassiz ◽  
Mammuthus Primigenius ◽  
Sand And Gravel ◽  
Woolly Mammoth ◽  
Cass County

A well-preserved third molar of a woolly mammoth (Mammuthus primigenius) was recovered from sand and gravel forming the highest (Herman) prominent strandline of Lake Agassiz near Embden in western Cass County, North Dakota. The Herman strandline is estimated to have formed about 11 500 years BP, and presumably the tooth is of similar age. Perhaps the animal lived in a tundra-like area near the Lake Agassiz shoreline.Additional evidence suggests that woolly mammoths occupied a tundra-like range south of the Wisconsin ice sheets extending from southern British Columbia to the Atlantic continental shelf off Virginia.

scholarly journals Influence of Bottom Sediments Physicochemical Characteristics on Distribution of Microelements in the Crimean Shelf Water Areas

2020 ◽  
Author(s):  
E. A. Kotelyanets ◽  
K. I. Gurov ◽  
◽  
Keyword(s):  
Heavy Metals ◽  
Trace Elements ◽  
Spatial Distribution ◽  
Organic Carbon ◽  
Bottom Sediments ◽  
Clay Fraction ◽  
Zinc Content ◽  
Physicochemical Characteristics ◽  
Water Area ◽  
Pollution Level

The paper presents the results of studies of the Kalamitsky Bay bottom sediments pollution level with microelements and heavy metals (Pb, Zn, Cu, Ni, Co, Cr, V, As, Sr, Ti, Fe, Mn) in comparison with the content of these microelements and heavy metals in the Balaklava Bay sediments. The paper analyzes data obtained during expeditions on the R/V Professor Vodyanitsky in the Kalamitsky Gulf in August 2011 (seaward part) and on the R/V Rioni in September 2012 (coastal area) as well as in the Balaklava Bay in October 2018. Content of microelements and heavy metals in bottom sediments of the studied water areas was determined by the X-ray fluorescence method using Spectroscan MAX-G device. For the water area of the Kalamitsky Gulf, the features of the studied trace element spatial distribution are considered, groups of trace elements with different spatial distribution patterns are identified. The correlation analysis determined influence of physicochemical characteristics of the sediments on distribution and accumulation of trace elements. In the water area of the Kalamitsky Gulf, a statistically significant correlation was observed of nickel, iron and zinc content with the clay fraction; dependance of increased concentrations of zinc, nickel and chrome on the content of organic carbon and predominance of lead in highcarbonate sediments. For the Balaklava Bay, the maximum positive values of correlations with the pelitic-silty fraction were noted for iron, manganese, vanadium and chrome; organic carbon correlates with chrome, iron, nickel and copper, whereas carbonates correlate with strontium. Similar patterns were observed earlier in the Sevastopol region bays, Feodosiya Gulf and Kerch Strait.

scholarly journals Distribution of bottom sediments on the continental shelf, northern Bering Sea

1977 ◽  
Author(s):  
D.A. McManus ◽  
D.M. Hopkins ◽  
C.H. Nelson
Keyword(s):  
Continental Shelf ◽  
Bottom Sediments ◽  
Bering Sea ◽  
Northern Bering Sea

Diving behaviour of two Ross seals off east Antarctica

2005 ◽  
Vol 32 (1) ◽  
pp. 63 ◽  
Author(s):  
Colin Southwell
Keyword(s):  
Continental Shelf ◽  
Additional Data ◽  
Prey Species ◽  
Current Knowledge ◽  
East Antarctica ◽  
Maximum Depth ◽  
Diving Behaviour ◽  
Sea Floor ◽  
Transmission Period ◽  
The Antarctic

The Ross seal (Ommatophoca rossii) is the least frequently sighted and least known of the Antarctic pinnipeds. Current knowledge of foraging and diving behaviour is based on observations of a single seal over <2 days. The current study provides some additional data on the diving behaviour of two Ross seals off east Antarctica over periods of 31 and 12 days during December–January 1999–2000 using satellite-linked dive recorders. Both seals remained over the continental shelf for these times, the female remaining some distance from the coast and the male moving close to the coast approximately half-way through his transmission period. Most dives by the female reached depths >150 m (maximum depth 372 m) and the modal duration was 10–11 min. The male’s dives were slightly shallower (most >100 m) and shorter (mode 6–7 min) when distant from the continental coast, and were truncated to a depth of 180 m when close to the coast, presumably by the sea floor. These dive patterns suggest that their prey species, thought to comprise mostly fish and squid, were relatively unavailable at depths <100 m.

Deep-Ocean Exploitation Technology

1971 ◽  
Vol 8 (02) ◽  
pp. 145-158
Author(s):  
Raymond Kaufman
Keyword(s):  
Continental Shelf ◽  
Large Scale ◽  
Deep Ocean ◽  
Abandoned Mine ◽  
Economic Potential ◽  
Mining Method ◽  
Mine Shaft ◽  
Sea Floor ◽  
Ocean Mining ◽  
Air Lift

The paper discusses the latest techniques proposed for mining minerals from the deep ocean. Deep ocean is defined as the sea beyond the continental shelf, particularly areas of the sea floor exceeding 1200 ft in depth. The three principal deep-ocean minerals having economic potential in the immediate future are identified. Four recently proposed advanced deep-ocean mining concepts are presented. Use of the air-lift pump as a viable mining method is discussed and a large-scale air-lift pump experiment conducted in an abandoned mine shaft at Galax, Virginia is described. The principal features of the conversion of a small C1-M-AV1 type cargo ship to a deep-ocean mining prototype vessel, RV Deepsea Miner, is outlined.

The State of Florida Paleoindian Studies Early Paleoindian Potentials on the Continental Shelf

2019 ◽  
pp. 276-282
Author(s):  
Ervan G. Garrison
Keyword(s):  
Big Data ◽  
Continental Shelf ◽  
Emerging Technologies ◽  
The State ◽  
Western Hemisphere ◽  
Archaeological Sites ◽  
Sea Floor ◽  
Human Colonization ◽  
Underwater Sites

Especially given the debate over the timing and means of prehistoric human colonization of the Western Hemisphere, the search for submerged archaeological sites on the sea floor is critical. This chapter reflects on previous chapters in addressing how future researches might find these underwater sites by using methodologies that are both geologically and anthropologically theoretical, including utilizing big data and emerging technologies to examine the sea floor.

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