Browsing Earth and Environmental Sciences by Issue Date
Now showing items 21-40 of 832
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Mode of Extrusion of Frenchman's Barn, Dunn Point Volcanic Formation, Arisaig, Antigonish County, Nova Scotia.
(1979-03-15)Frenchman's Barn, near Arisaig, Nova Scotia, is an enigma. It contains some of the textural characteristics of ash flows and lava flows and some which are not common to either. Part of the problem is that many of the ... -
Metamorphism of the George River Group; Gold Brooks, Victoria County, Cape Breton Island, Nova Scotia.
(1979-03-15)The Precambrian George River Group of Cape Breton Island, Nova Scotia is characterized by metasediments and metavolcanic rock types. A sequence of predominantly feldspathic quartzites slates and quartzites at Gold Brooks ... -
Depositional Environments and Diagenesis of a Section of the Herbert River Limestone Member, Windsor Group, Upper Pleasant Valley, Nova Scotia
(1980-03-15)A stratigraphic section of the Herbert River Limestone Member, Windsor Group, exposed on Pleasant Brook, Upper Pleasant Valley, N.S., consists of ten carbonate lithologies. From base to top of section (with their respective ... -
The Applicability of the 40Ar/39Ar Stepwise Outgassing Method to the Dating of Slates
(1980-03-15)Four samples ranging in composition from a pure slate to a pure metasiltstone, collected from the same location in the Lower Paleozoic Meguma Group, are age dated by the 40Ar/39Ar stepwise outgassing technique. The discordant ... -
Evolution of the Phlogopite-Chrome Diopside-Spinel Pools in the Ultramafic Nodules of Pipe 200, Northern Lesotho
(1980-03-15)Peridotites are ultramafic igneous plutonic rocks consisting of predominantly ferromagnesian minerals. Their mineralogy reflects their stability field at different pressures and temperatures. olivine-2 pyroxenes-garnet: ... -
Geological and Mineralogical Studies at the West Gore Stibnite-Gold Property, Hants County, Nova Scotia.
(1980-03-15)The West Gore mine was the major producer to antimony in Canada from 1882 to 1939, and it is listed among the gold deposits of Nova Scotia. However, the last comprehensive geological report on the camp dates to 1939. This ... -
A Field Geological Study and Analysis of Joint Patterns Related to the Francoeur-Arntfield (Gold Mines) Shear Zone, Beauchastel Township, Temiscamingue County, Abitibi Greenstone Belt, Quebec.
(1980-03-15)Field mapping (1:5000) and study of joints in an area of 7.3 square kilometres centered around the Arntfield Gold Mines, during the summer of 1979, forms the basis for this study. East-striking, north-dipping rocks of ... -
Heavy Mineral Provenance Studies on the Wallace River Formation of the Pictou Group between Tatamagouche and River John, Nova Scotia
(1980-03-15)Heavy mineral provenance studies were conducted on sandstones of the Wallace River Formation (Pictou Group) over an area of roughly 200 km2. As well, three major heavy mineral provinces were established. The strata cropping ... -
Post-Pleistocene Sea Level Changes in the Baie Verte Estuary (Northumberland Strait) as Revealed by Foraminiferal Studies
(1980-03-15)Two cores were obtained from the Baie Verte estuary of the Northumberland Strait to study relative sea level changes by examination of foraminiferal distributions. The base of the cores contained a layer of salt marsh ... -
Occurrence and Origin of Garnet in the South Mountain Batholith
(1980-03-15)Garnet occurs around the margin of the South Mountain batholith as an accessory mineral in three distinct comagmatic phases. Electron microprobe analyses and textural relationships of 50 garnet-biotite pairs indicates that ... -
The Petrography and Depositional Environment of the Cardium Formation in the Rocky Mountain House Area of Central Alberta
(1980-03-15)The Cardium Sandstone in the Rocky Mountain House area of the Garrington and Ferrier fields of Alberta is part of a progradational sequence consisting of marine shale at the base through sandstone to conglomerate, followed ... -
40Ar/39Ar Dating of Silurian-Devonian Rocks from the Gander and Botwood Zones of Newfoundland and their Paleomagnetic Implications
(1980-03-15)Paleomagnetic poles recently reported by Lapointe, Murthy, and others are widely divergent from poles of similar age from cratonic North America. Two of the units from Newfoundland have each yielded two widely separated ... -
Fluid Inclusion Geothermometry in Fluorite from Gays River, Nova Scotia and Boat Harbour, Newfoundland
(1980-03-15)Fluid inclusions in post-ore fluorite from the base metal deposit in Carboniferous carbonates at Gays River, Nova Scotia, homogenize at a mean temperature of 142 + 8oC. Calcite in the deposit crystallized earlier, at a ... -
40Ar/39Ar Ages for the St. Anthony Complex Dynamothermal Aureole, Northwestern Newfoundland
(1981-03-15)A study of 40Ar/39Ar age relationships of various structural levels of the St. Anthony Complex dynarnothermal aureole was undertaken. Units of the aureole dated include a small jacupirangite suite metamorphosed with the ... -
The White Rock Formation Metavolcanics at Cape St. Mary, Nova Scotia: Petrography, Geochemistry, and Geologic Affinities.
(1981-03-15)A 156 meter thick section of the Silurian White Rock Formation occurs at Cape St. Mary, southern Nova Scotia in the core of a southwest plunging syncline. It includes four metabasite units identified as basaltic flows, and ... -
Whole Rock Analysis using the Electron Microprobe
(1981-03-15)Rock powders ranging in composition from a peridotite to a granite were fused on molybdenum and tantalum strips in a vacuum and a nitrogen atmosphere. A low voltage high amperage source was used to melt the rock powders. ... -
Depositional Analysis of the Upper Meguma (Halifax Formation) at Ovens Park, Lunenburg County, Nova Scotia
(1981-03-15)Two sections of the Halifax Formation, Meguma Group (Lower Paleozoic) at Ovens Park, Nova Scotia, were examined for sedimentary structures, grain size and facies associations. Interpretation of the depositional processes ... -
A Detailed Study of a Submerged Pingo-Like-Feature in the Canadian Beaufort Sea, Arctic, Canada (Postprint)
(1982-03-15)There is controversy as to the origin of the dome shaped hills (pingo-like-features (PLFs)) found on the Canadian Beaufort Sea continental shelf and slope. A detailed study of a PLF was undertaken to define its characteristics ... -
SCALE MODEL EXPERIMENTS WITH THE HORIZONTAL LOOP ELECTROMAGNETIC TECHNIQUE OF GEOPHYSICAL PROSPECTING Postprint
(1982-03-15)This study deals with the construction and application of a scale model horizontal loop electromagnetic system whose function is to quantitatively measure the in-phase portion of the vertical component of an anomalous ...