The Sault Ste. Marie map-area lies at the western end of the Huronian belt along the north shore of Lake Huron. It includes rock formations that range in age from highly metamorphosed early Precambrian basement rocks to unmetamorphosed, flat-lying Cambrian sediments and unconsolidated Pleistocene glacial materials. The rock formations of the Sault Ste. Marie area have been arranged by earlier workers (McConnell 1926) into five major structural and stratigraphic elements, each quite distinct in age and character.

The analysis of glacier wasting is a tripartate study which includes: the measurement of the quantity of wasting, an examination of the causes of wasting, and an investigation of the means of disposal of the waste products. This particular investigation is an attempt to improve upon the accuracy of measurements of wasting so that future investigators will be able to make more meaningful statements regarding cause. In the 1930's the first quantitative studies of the heat exchange at a melting ice surface were made in Scandinavia. By measuring the heat received at the surface from radiation, convection and conduction from the atmosphere, glacial-meteorologists were able, with limited accuracy, to relate the heat received at the surface to the melt measured from the surface lowering of the glacier. This type of study has now been carried out in many varied locations with a concommitant rise in the sophistication of the observational techniques.

Two spherical undulatory quartz samples from Pennsylvania and Labrador were studied by optical and x-ray methods. Optical studies of undulatory quartz with a two-axis goniometer showed that they have a larger range of undulatory extinction with a large standard deviation. The undulatory range is proportional to the stress and to the sample size. Tne undulatory extinction in quartz is due to misorientation of the crystallites in the crystal. From x-ray precession photographs it was observed that undulatory quartz produces diffuse spots elongated along the Debye-Scherrer rings. The size of the spots increases linearly with increasing radius of the Debye-Scherrer ring. When the elongation of the spots on a-axis and c-axis precession photographs were compared, spots in the c-precession photograph were more elongated. Therefore, it was concluded that there are more dislocations along a-axis in the sample. Non-symmetrical density distribution of an x-ray topography of a spot was observed. [...]

[...] The extensive exploration activity, precipitated by the discovery of a major base metal deposit in 1957, made it desirable to compile and integrate the rapidly accruing geologic data. The writer undertook this project for the Quebec Department of Natural Resources. [...]

During the past three years the author has been engaged in studies of petrological and structural problems in an area including the Verna uranium deposit, located in northwestern Saskatchewan, three miles northeast of the Eldorado townsite (fig. 2). Field studies in the Verna area were supplemented by laboratory work at McGill University. The field work entailed surface mapping at a scale of one inch equals 100 feet, underground mapping at a scale of one inch equals 20 feet and the logging of several thousand feet of diamond drill core. Laboratory research included flat- and universal-stage thin-section study, mineral identification by X-ray diffraction and refractive index methods and wet chemical analyses to determine the contents of major elements in twelve rocks. [...]

The Deschambault Formation of the St. Lawrence lowland of Quebec was investigated and defined by T. H. Clark during the course of mapping the geology of this area. The large fauna of this formation indicates that its age is middle Ordovician, being time equivalent to the Hull stage of the Trenton series (Clark, in press, a). The limestones of the Deschambault outcrop in a discontinuous belt on the northwest side of the St. Lawrence River from Montreal to a point just beyond Quebec City (Figure 1). Stratigraphic sections are exposed only in quarries and river channels because of the thick overburden formed by Pleistocene glacial deposits. Such outcroppings are readily accessible. [...]

The Deweras Formation between the Umfuli and Umniati Rivers consists of an upper series of arkoses and shales, (Arenaceous Series), a middle sequence of tholeiitic lavas, (Volcanic Series), and a lower discontinuous series of quartzite and conglomerate, (Basal Sedimentary Series). The succession is interpreted as being deposited in a variable shallow water to continental environment, which in this instance is believed to be associated with a step faulted or graben structure. [...]

In recent years our knowledge of ore deposits, and of the conditions under which they were deposited, has been augmented by experimental investigations of sulphide, and to a lesser extent, arsenide, oxide, selenide, and telluride systems. The physical conditions of formation for the gold-silver tellurides were examined in detail in the present study. These minerals have a wide geographic distribution and occur in several geological environments. The spectacular ores at the gold and silver mining camps of Cripple Creek, Colorado, Kalgoorlie, Western Australia, and Sacarambu and Offenbanya in Transylvania consisted of telluride mineralization. Gold-silver tellurides are also present as minor constituents in some sulphide ore deposits and quartz-vein-type gold deposits. There are as many as 26 such occurrences in the Canadian shield alone (Thompson, 1949). [...]

The Des Quinze lake - Barriere lake area is located in western Quebec and covers approximately 1400 square miles. It is underlain almost entirely by Precambrian rocks but contains a few occurrences of a Paleozoic formation. The oldest rocks are part of a volcanic- sedimentary assemblage which occurs in the southwest along a N.60o- E.-trending belt. The volcanics, consisting of andesite, dacite, hornblende rock, rhyolite, quartz-feldspar porphyry, tuff and agglomerate, contain interlayered lenses of greywacke, iron formation and siltstone. The hornblende rock represents, in most places, the coarsergrained portions of thick lava flows, but it may in some instances be of magmatic origin. The volcanic-sedimentary rock sequence is isoclinally folded along east-west, or nearly so, axes, and it dips steeply to the south. The volcanics are altered and somewhat recrystallized, and the mineral assemblage is that of the lower amphibolite facies and, in places, that of the upper greenschist facies. [...]

The present work describes the results of a series of experiments made with objectives: a) to elucidate the thermochemical properties of calcite and aragonite and b) to contribute to the development of the twin calorimeter apparatus devised by Dr. V. A. Saull in the Department of Geological Sciences, McGill University. [...]