U-Pb dating of Ordovician felsic volcanism in the Schistose Domain of the Galicia-Trás-os-Montes Zone near Cabo Ortegal (NW Spain)

The northern termination of the Schistose Domain of the Galicia-Trás-os-Montes Zone is a tectonic slice named the Rio Baio Thrust Sheet, which is sandwiched between the Cabo Ortegal Complex and the Ollo de Sapo Domain of the Central-Iberian Zone. The Rio Baio Thrust Sheet is formed by two volcanosedimentary series, the Loiba and the Queiroga Series. The Loiba Series contains calc-alkaline dacite and rhyolite, while the overlying Queiroga Series has alkaline rhyolite. These series were considered to be in stratigraphically upwards continuity and believed to be Silurian in age. U-Pb dating of an alkaline rhyolite in the Queiroga Series provides an Arenig age of 475 ± 2 Ma. This age makes the Queiroga Series the oldest known stratigraphic unit in the Schistose Domain of the Galicia-Trás-os-Montes Zone, impeding correlation between the lithostratigraphic sequences of Ortegal and Central Galicia. As well as providing evidence of an unforeseen structural complexity within the Rio Baio Sheet, the new data supports the notion that the Schistose Domain is not parautochtonous, but a separate lithotectonic unit in thrust contact with the underlying Central-Iberian Zone

Multinational Andean Project; Geoscience investigations to spur economic and social development in the border regions between Argentina, Bolivia, Chile and Perú. Inception Report

The countries of Argentina, Bolivia, Chile and Perú share common geography and borders. The mountain chain of the Andes, forming the spine of South America, links these countries creating a common geology, ecology and economic heritage bred of this link. However, the Andes also form a geographic barrier to travel east and west. This barrier was uplifted by geologic forces creating a hostile world, yet these forces endowed the region with immeasurable mineral riches. Mineral resources have already been discovered and others are certainly yet to be uncovered. lt is toward these yet-to be-found ore deposits, the mineral wealth they contain and the sharing of common purposes that can unite people and countries that this Project is directed. For the participating South American countries, the ultimate goal is the economic and social development of depressed regions along their borders, mainly through mine and infrastructure development. This project seeks to strengthen the National Geoscience Surveys of Argentina, Bolivia, Chile and Perú, positioning them to undertake complex and demanding projects directed towards the needs of client groups shared by each country. An important client group, made up of mainly exploration and mining companies, many of whom are Canadian, still needs to be supplied with new and updated geoscience information. It is anticipated that new and enhanced data and updated information will supply the impetus tor exploration in remote and little-explored regions of the four participating countries, mainly in their border regions. This exploration activity and the possibility it brings of new mining development may bring economic relief to some of the most - impoverished parts of Argentina, Bolivia, Chile and Perú, and ultimately to Canada through Canadian private sector investment. The regions selected have little hope for other types of economic development besides the exploration impetus and possible mine development resulting from the work of the National Surveys. In addition, the new geoscience information supplied for these regions will assist in land use planning and general economic-development. In addition to supplying much needed basic geoscience data to client groups within each country, this information can be exchanged between the National Surveys to their mutual benefit. Joint investigations with common goals in regions of similar geology, and from differing positions of national strength and expertise, will build stronger national institutions within each country and stronger tie between the countries and Canada. This "Horizontal Integration" will bring the expertise that presently resides within the member countries to the forefront, benefiting all of the participating nations. The Geological Survey of Canada will prov-ide scientific counsel, specialized expertise and enhance communications between the countries through the project. In addition to the direct benefit to the Canadian private sector through the sale of goods and services under the proposed project, the Geological Survey of Canada will benefit through expansion of its knowledge base in geological terrain relevant to both its national mandate and its international one of increasing the competitiveness of Canadian companies

Movimientos en Masa de la Región Andina: Una Guía para la Evaluación de Amenazas

Fil: Servicio Geológico Minero Argentino; Argentina.Fil: Servicio Nacional de Geología y Técnico de Minas de Bolivia; Bolivia.Fil: Geological Survey of Canada; Canadá.Fil: Servicio Nacional de Geología y Minería; Chile.Fil: Instituto Colombiano de Geología y Minería; Colombia.Fil: Servicio Geológico Nacional; Ecuador.Los Andes son jóvenes, tectónicamente hablando. Su relieve topográfico abrupto, actividad sísmica y extenso vulcanismo, combinado con una meteorización profunda, conllevan a una alta e inusual incidencia de amenazas por movimientos en masa. Los movimientos en masa son procesos importantes en los países andinos y literalmente significan una pesada carga para sus habitantes. De hecho, algunos de los peores desastres asociados a movimientos en masa en el mundo han ocurrido en la región Andina: los flujos de detritos de Vargas, Venezuela, ocurridos en 1999, con alrededor de 15.000 víctimas, El lahar de Armero, Colombia, ocurrido en 1992, con 23.000 víctimas y la avalancha de roca y hielo/flujo de detritos de 1970 en el Nevado Huascarán, Perú que se llevó 18.000 vidas (Ver Anexo B). Además de estos grandes eventos, cientos de pequeños movimientos en masa interrumpen las actividades normales en ciudades, pueblos y carreteras todos los años, provocando daños y muerte a sus habitantes y causando serias pérdidas económicas. El propósito del Proyecto Multinacional Andino: Geociencias para las Comunidades Andinas, PMA:GCA, adelantado por el Servicio Geológico de Canadá y los institutos líderes de investigación geológica en la región Andina, fue contribuir a mejorar la calidad de vida de los habitantes de los Andes reduciendo el impacto negativo de amenazas naturales. Específicamente en el campo de la amenaza por movimientos en masa el Proyecto adoptó como objetivo agrupar a los especialistas de movimientos en masa de distintos países a efectos de revisar y promover los conocimientos y capacidades requeridas para reducir las pérdidas por estos procesos para beneficio de todos los ciudadanos. Cuando el proyecto comenzó, rápidamente fue evidente que una de las necesidades primarias era establecer una “lenguaje” común – al margen del español y del inglés – un lenguaje de especialistas, que posibilitará entender los procesos de movimientos en masa y seleccionar los métodos apropiados para su estudio y control. Con el fin de cumplir esta tarea, el Consejo Ejecutivo del Proyecto estableció el Grupo de Estándares para Movimientos en Masa, GEMMA. Este libro es el resultado de varios años de trabajo del grupo que incluyeron reuniones, viajes de campo, miles de mensajes vía e-mail e intercambio de información en Geosemantica (http:// can.geosemantica.net), horas de calurosas discusiones y numerosos bosquejos. Como resultado final de este largo proceso, este libro representa el consenso alcanzado en un grupo internacional formado por personas altamente calificadas y con gran experiencia el tema, representantes de nuestras instituciones al grupo GEMMA, expertos locales e internacionales. Se presentan aquí los acuerdos logrados en el campo de movimientos en masa, particularmente (1) clasificación de movimientos en masa, (2) procedimientos para la selección de metodologías para análisis de amenazas, (3) simbología cartográfica, (4) levantamiento de inventarios, (5) terminología relativa al tema. Este documento ha sido discutido y deliberado por las directivas de nuestras instituciones y se constituyen en una guía, estándar y referencia para la evaluación de amenaza por movimientos en masa en la región andina, el cual adoptamos como instituciones. Esperamos que el libro inspire interés en un enfoque sistemático y más proactivo para la reducción de las amenazas por movimientos en masa en los Andes

Contributions to Canadian pal\ue6ontology.

v.3 (1908

Contributions to Canadian pal\ue6ontology.

v.4:pt.1-2 (1899-1900

Summary of mineral production of Canada.

Mode of access: Internet

Province of Nova Scotia, Halifax County [cartographic material] : Moose River sheet, no. 50 /

Geological map of the Moose River region in Nova Scotia with relief shown by spot heights.; "George M. Dawson, C.M.G. L.L.D., F.R.S., Director".; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm2463-6. Ancilliary section: Section on line AB, CD, EF. Scale [1:63,360].Moose Rive

Province of Nova Scotia, Halifax County [cartographic material] : Sheet Harbour sheet, no. 40 /

Geological map of the Sheet Harbour region in Nova Scotia with relief shown by spot heights.; "George M. Dawson, C.M.G. L.L.D., F.R.S., Director".; Prime meridian: Greenwich.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm2463-7. Ancilliary section: Section on line A-B, C-D. Scale [1:63,360].Sheet Harbou

Anthropological series.

Bibliographical footnotes.Most of the plates have guard sheets with descriptive letterpress.At head of title: Canada. Dept. of Mines.Each no. has also a distinctive title.Nos. 5-6 and 8-9 issued as double numbers.No. 3 published in 1913, nos. 1-2 in 1914.Mode of access: Internet

Memoirs /

Scattered numbers issued 1910-22, in 4 sub-series: Anthropological, Biological, Geological, Topographical. In 1922 all were discontinued except the Geological, which also ceased in 1928.At head of title: Canada. Department of Mines. Geological Survey Branch.Includes bibliographies.Mode of access: Internet