976 resultados para Special Euclidean group
Resumo:
The major geologic units of the Itremo region in central Madagascar include: (1) upper amphibolite to granulite facies (higher grade) Precambrian rocks, mainly para- and orthogneisses, and migmatites; (2) the newly defined Itremo Nappes, a fold-and-thrust belt containing the Proterozoic Itremo Group sediments, metamorphosed at greenschist to lower amphibolite facies (lower grade) conditions: (3) Middle Neoproterozoic and Late Neoproterozoic-Cambrian intrusives. The stratigraphic succession of the Itremo Group in the eastern part of the Itremo region is, from bottom to top: quartzites, metapelites, metacarbonates and metapelites overlain by metacarbonates. During D1 the Itremo Group sediments were detached from their continental substratum, deformed into a fold-and-thrust nappe (Itremo Nappes), and transported on top of higher grade rocks that are intruded by Middle Neoproterozoic (c. 797–780 Ma) granites and gabbros. A second phase of deformation shortening (D2) affected both the Itremo Sedimentary Nappes and structurally underlying higher-grade rocksunits, and formed large-scale N-S-trending F2 folds. S1 axial plane foliations in Itremo Group sediments are truncated by Late Neoproterozoic-Cambrian granites (c. 570–540 Ma). The age of the formation of the Itremo Nappes is not well constrained: they formed in Neoproterozoic times between 780 and 570 Ma.
Resumo:
"July 1996."
Resumo:
Not distributed to depository libraries in a physical form.
Resumo:
Includes bibliographical references.
Resumo:
Includes bibliographies.
Resumo:
"Sponsored by the Institute for Materials Research of the National Bureau of Standards ... [et al.]."
Resumo:
"The 29th meeting of the MFPG and these proceedings were sponsored by the Center for Materials Science of the National Bureau of Standards ... [et al.]"
Resumo:
Head and tail pieces (include facsimile autographs).
Resumo:
Shipping list no.: 91-41-P.
Resumo:
"This publication is supplementary to the main report on families (vol. 6 of the fifteenth census reports on population), which contains statistics on foreign-born white families as a group, not classified by country of origin."--p. 5.
Resumo:
Includes index.
Resumo:
"August 1969."
Resumo:
Includes index.