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That very interesting dance in the Baltimore Canyon. Pointing out that offshore oil and gas has been a marginal proposition until now--the only consistent moneymaker being the Federal government as leaser--it is hard to understand the feverish spasms that have swept the stock market for months, at the slightest hint of a discovery in Baltimore Canyon. Despite the dismal returns vs. Most of these oil men widely share the belief that most of the large fields that remain to be discovered aremore » in frontier areas of the continential shelf; and one ''big elephant'' discovered can easily erase a string of losses. Still another reason to keep playing is an astonishing advance in exploration technology known as ''bright spots''.
A review of the existent data concerning these factors for the Baltimore Canyon Trough area a relatively well studied segment of the Continental Shelf reveals that the movement and dispersal of potential oil spills cannot be reliably predicted. The rodlets break with a conchoidal fracture, and some show an apparent cellular cast on their longitudinal surfaces.
Electron microprobe and SEM-energy-dispersive X-ray EDX anlayses indicate that the minerals are dominantly clays probably illite and chlorite and iron disulfide; calcium carbonate, silicon dioxide, potassium aluminum silicate feldspartitanium dioxide, zinc sulfide, and iron sulfate minerals have been also identified. was by Loran-C 5-minute fix interval. Integration of one of the true-amplitude-processed lines and one-dimensional modeling of the layer provide data on the impedance contrast and interference patterns that further reinforce the salt lens interpretation.
Brooke, S. A multi-disciplinary study of two major submarine canyonsBaltimore Canyon and Norfolk Canyonoff the US mid-Atlantic coast focused on the ecology and biology of canyon habitats, particularly those supporting deep-sea corals. Demersal fish distribution and habitat use within and near Baltimore and Norfolk CanyonsU. Middle Atlantic Slope. A deductive approach to the problem of determining the movement and effects of spilled oil over the Outer Continental Shelf requires that the potential paths of oil be determined first, in order that critical subareas may be defined for later studies.
The seismic-reflection profiles were placed to complement other data gathered ly by the USGS.
The air-gun and sparker profiles are of high quality, but the 3. Data were acquired over 22 km of ship's track. That very interesting dance in the Baltimore Canyon.
Historical data on deep-sea corals from these canyons were sparse with less than records for the mid-Atlantic region, with most being soft sediment species. High-resolution seismic-reflection profiles were collected by the U. These data were acquired as part of a study to determine potential geologic hazards to petroleum development of the Baltimore Canyon trough area. Under the binocular microscope, most of the rodlets appear black, but a few are reddish brown, or brownish and translucent on thin edges.
Geophysical characteristics are compatible with an interpretation of this negative-polarity reflector as a salt lens deposited on the top of a synrift evaporite sequence. Depth was a major factor that separated the fish faunas into two zones with a boundary around m.
Early to middle Jurassic salt in Baltimore Canyon trough. The side-scan sonar system was operated along the uppermost Continental Slope to investigate its potential for use in this environment. Large gorgonians were the dominant structure-forming coral taxa on exposed hard substrates, but several species of scleractinians were also documented, including first observations of Lophelia pertusa in the mid-Atlantic Bight region.
The lens-shaped layer demarked by the reflection has a velocity of 4. Some species have a wide distribution e. Finally, oil men are lured into devonian Baltimore Maryland MD date night offshore arena by a subtle mixture of perceived necessity, an innate if somewhat battered spirit of optimism, and an unabashed fascination with the game itself--the latter, little understood outside the industry according to Dick Palmer, Texaco's top exploration man, but ''a very interesting dance''.
Elements determined to be organically associated in the rodlets. Morphology, distribution, and development of submarine canyons on the United States Atlantic continental slope between Hudson arid Baltimore Canyons. On this cruise, the Continental Slope between Lindenkohl and Carteret Canyons was surveyed along lines spaced one-half nautical mile apart to study the size and distribution of mass-wasting features as a guide to assess the importance of mass wasting processes on the Continental Slope.
Pointing out that offshore oil and gas has been a marginal proposition until now--the only consistent moneymaker being the Federal government as leaser--it is hard to understand the feverish spasms that have swept the stock market for months, at the slightest hint of a discovery in Baltimore Canyon. Wave refraction diagrams for a wide range of normally expected wave periods and directions were computed by using three bottom topography approximation techniques: quadratic least squares, cubic least squares, and constrained bicubic interpolation.
Mathematical or physical interpretation of certain features appearing in the computed diagrams is discussed. However, alternative interpretations of the layer as gas-saturated sediments, an overpressured shale, or a weathered igneous intrusion are also worthy of consideration.
Variations in the thermohaline structure of waters and in the distribution of suspended matter are adequately known; the uncertainty is due to insufficient wind and storm statistics and to the lack of quantitative understanding of the relationship between the nontidal drift and its basic driving mechanisms. These vitrinite reflectances indicate either subbituminous A or high-volatile C bituminous coal. They range in diameter from about 0.
Wave refraction diagrams for the Baltimore Canyon region of the mid-Atlantic continental shelf computed by using three bottom topography approximation techniques. The canyons provide suitable habitat for the development of deep-sea coral communities that is not readily available elsewhere on the sedimented shelf and slope of the Mid-Atlantic Bight.
Lyons, P. Rodlets, occurring in shale and coal uppermost Berriasian to middle Aptian, Lower Cretaceouswere identified from drill cuttings taken from depths between ft m and 11, ft m in the Texaco et al. When polished and viewed in reflected light, the rodlets appear dark gray and have an average random reflectance of less than 0. Most of these oil men widely share the belief that most of the large fields that remain to be discovered aremore » in frontier areas of the continential shelf; and one ''big elephant'' discovered can easily erase a string of losses. The thin, horizontal salt lens was probably deposited or precipitated during the Jurassic in a shallow, narrow peripheral rift basin, as rifting progressed down the North Atlantic margin.
Geophysical analyses were made on three wavelet- and true-amplitude processed multichannel seismic dip lines. A trough marking the onset of the lens has an amplitude that is 10 to 20 db greater than reflections from the encasing layers and an apparent reflection coefficient of devonian Baltimore Maryland MD date night Using amplitude versus offset analysis methods, we determined that observed reflection coefficients, though variable, decrease consistently with respect to increasing offset.
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A difference in canyon age would suggest that canyons are initiated on the continental slope and only with greater age erode headward to indent the shelf. Similar inadequacies should be anticipated for other potentially leasable areas of the shelf because an understanding of the movement of spilled oil has not been the underlying aim of most studies.
The layer associated with the reflection is about 25 km wide, about 60 m thick in the center, and thins monotonically laterally, though asymmetrically, at the edges. This study substantially increased the of deep-sea coral records for the target canyons and the region.
The scanning electron microscope SEM and light microscope reveal the presence of swirl-like features in the rodlet interiors. Movement and effects of spilled oil over the outer continental shelf; inadequacy of existent data for the Baltimore Canyon Trough area.
These data were supplemented by 40, min bottom trawl samples. Fish observations were ased to five general habitat deations: 1 sand-mud flat2 sloping sand-mud with burrows, 3 low profile gravel, rock, boulder, 4 high profile, canyon walls, rocks or ridges, and 5 seep-mixed hard and soft substrata, the later subdivided into seven habitats based on amounts of dead mussel and rock cover.
Fishes in the shallower zone, characterized by Laemonema sp. Fishes in the deep zone did not exhibit strong habitat affinities, despite the presence of a quite rugged, extensive methane seep. Overall, 34 ROV dives — m resulted in h of bottom video observations and numerous collections.
Canyons range from straight to sinuous; those having sinuous axes indent the edge of the continental shelf and appear to be older than those that head on the upper slope and have straighter axes. We propose that habitat specificity decreases with increasing depth.
Although the diversity of the structure-forming corals gorgonians, branching scleractinians and large anemones was low, many areas of both canyons supported high coral abundance and a diverse coral-associated community. The rodlets were analyzed directly for C, H, N, O, and total S and are interpreted as true resins on the basis of C and H contents that range from Elemental and infrared data support a composition similar to that of resinite from bituminous coal.
Numerous submarine canyons along the United States middle Atlantic continental margin support enhanced productivity, diverse and unique habitats, active fisheries, and are vulnerable to various anthropogenic disturbances.
Shallow gullies on the middle and upper slope parts of the canyon walls suggest that submarine erosion has been a major process in a recent phase of canyon development. Unlike thicker deposits in other areas that deformed and flowed, often into diapir structures, this thin lens has remained relatively undisturbed since deposition. Linear inversion yields a low density, about 2. All methods combined yielded a total of species of fishes, 12 of which are either new records for this region or have new range data.
Track-line distances totaled 2, km of in3 air-gun with wave shaper profiles, 2, km of J sparker data, and 2, km of 3. Despite the dismal returns vs. The distribution and morphology of submarine canyons off the eastern United States between Hudson and Baltimore Canyons have been mapped by long-range sidescan sonar. Minerals associated with the rodlets occur as sand-size grains attached to the outer surface, as finely disseminated interior grains, and as fracture fillings.
The paths of spilled oil, in turn, depend primarily on the temporal and spatial variability of four factors: the thermohaline structure of the waters, the circulation of the water, the winds, and the distribution of suspended matter.
The distribution of a species is driven by a combination of factors, which include availability of appropriate physical structure and environmental conditions. The rodlets fluoresce dull gray yellow to dull yellow.
During two cruises 15 Aug—2 Oct and 30 Apr—27 MayBaltimore and Norfolk canyons and nearby areas including two cold seeps were intensively surveyed to determine demersal fish distributions and habitat associations. Fishes defining the deeper zone included Lycodes sp. The influence of corals, sponges and live mussels seeps only on fish distributions was also investigated. Still another reason to keep playing is an astonishing advance in exploration technology known as ''bright spots''.
Both canyon areas supported abundant and diverse fish communities and exhibited a wide range of habitats, including extensive areas of deep-sea corals and sponges and two nearby methane seeps — m, — m. Coral distribution varied within and between the two canyonswith greater abundance of the octocoral Paragorgia arborea in Baltimore Canyonand higher occurrence of stony corals in Norfolk Canyon ; these observations reflect the differences in environmental conditions, particularly turbidity, between the canyons.