Using my program to perform a Monto Carlo method of rendering my findings and data from the NGDC , I’ve compiled and rendered this figure indicating potential methane or natural gas ridges along the coastal trough mains of Northern Labrador. The bathymetric data recovered indicates scaling trough contours along coastal lines using residual data of primary coastal ridge sites. The following findings support why there are potential biomarkers for natural gas and methane existence due to glacial shifts into deposit ridge areas lithographically typical of shelves that contain these resources.
Though poor in quality, the figure indicates distinct ridge features of continental Labrador off the coasts of Cartwright, Hopedale and Hebron. The most striking features are depressions or channel runs parallel along the coast then separating inner portions of the shelf that are highly irregular in depth from the coastal system, relating closely with the Norwegian ‘skajergaard’ area. The channel traces continuously through these areas as a irregular undulating bottom relief of a shallow 150 meters from the sea floor.
The shelf outside consists of ridge areas of 30-50 miles more or less separated by depressions or troughs. The most extensive depression is seen in the northwestern part extending across the shelf within 30 miles. Norwegian depressions are abruptly landward with a relative steep slope situated along the continuation of the inner slope of the longitudinal depression, showing shallower outter areas. Another shallower and less significant transverse trough is seen in the central area, farther from the south where depressions branch off from the longitudinal channel following a northerly direction.
It seems likely that the longitudinal channel runs off the northeast coast of Labrador and more or less parallel to the distance of more then 400 km, representing a major crustal fracture zone.
The longitudinal marginal depressions outside the Norwegian coast have been carved out by erosional agents during periods when sea levels were lower than at present. Similar origins potentially exist off the Labrador coast with an initial preglacial valley of erosion being particularly active along the weak fractures and along with the subsequent denudation of ice.
The great depressions in the sea floor area are usually narrower submarine fjords, accounting for inner marginal channels towards and to the shelf edge, being formed mainly by ice erosion assuming that the outer part of the shelf contains rocks that have lithological characteristics from those of the inner shelf area, being very soft rocks with a great concentration of fractures. From this assumption, the level of inner shelf reaches depths of 100 fathoms to the inner depth of over 450 fathoms over 5 kms in some sections suggesting that additional fractures other than ice erosion formed these features.
There would seem to be good grounds for considering the landward slopes that transverse depressions of the longitudinal channel are fault scarps related to the glaciations of the inner shelf as the slightly sloping bottom of the northern depressions toward the marginal channel indicate a southwestern glacial tilt.
The Labrador shelf does not show strong ice erosion at greater depths considering the great lithological character of the region is tectonic in origin.
The Norwegian shelf that the east coast of Labrador bordered by longitudinal fault zones are run off at present coasts and are more or less parallel with shelves that traverse fractures lines or fault lines that cut across the shelf indicating deposition of sediments by coastal erosion or glacial fault slip into eroded areas.
Or in retrospect – subsurface soils moved with coastal erosion during the time with ocean levels were much lower and sediments could move must faster in drier environments due to a lowering of atmospheric pressures. Also during the glacial period, glaciers carry bio-material as glacial faults pull bio-material underneath them and sediment loading occurs. Under the high mounting pressures of the glacier these sediments compacted into ridges and begin to change chemical bonds of these sediments. These types of deposits are found off the coast of Norway and the geophysical characteristics are typical off the shelves of Labrador.
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