 | | Report (issue) | | amphibolitized 38 olivine gabbro 22. Photomicrograph of amphibolite . 39 23. Photograph of a diallage-plagioclase...olivine gabbro show a progressive alteration into amphibolite which consists of an assemblage of hornblend...occurs locally within the sill. Evidence that the amphibolite margin, previously termed Roan Gneiss, is orthoamphibolite...of Keith (1907) shows associated ultramafic-amphibolite bodies within a thick interlayered sequence of...likely that many of the attitudes measured at small outcrops represent some of the smaller minor folds. The |  | | Report (issue) | | coincides with the westernmost sandstone and shale outcrops of the Chilhowee Group and Sandsuck Formation...Asheville Basin, and the Waynesville- Canton Basin. Lower, much more subdued landscapes characterize intermontane...that of the field mapper. We have recorded many outcrops on our field sheets while making cross-country...oversimplification to relate isolated or selected outcrops of mylonite in these basement rocks to single...virtually unmetamorphosed sandstones and shales of the Lower Cambrian Chilhowee Group along the northwest margin |  | | Book | | represents a fragment of a single North Atlantic land mass. The largest part of the ice-free area is made...structural divisions of Greenland the neighbouring land areas. in relation to Along the west coast of...polymetamorphic mineral assemblages, mainly in high amphibolite and hornblende granulite facies, are characteristic...Archaean gneisses. The gneisses are mostly in amphibolite facies though granulite facies gneisses occur...remobilised basement gneisses under upper greenschist-amphibolite facies conditions during the formation of the | | | Book | | Greenland represents a fragment single North Atlantic land mass. with of a The largest part of the ice-free...1. The structural divisions the neighbouring land areas. of Greenland in relation to Along the...Archaean gneisses. The gneisses are mostly in amphibolite facies though granulite facies gneisses occur...Archaean are known semblages, mainly in high amphibolite gneisses is thought and horn- to be due ...major mid-Palaeozoic fold belts occur in Green- land: the Caledonian fold belt of East and North-East |  | | Report (issue) | | - Chart of Min eral Sections of the H eemskIrk District ... .. I) I, ATE PLAT~~ Y I.- Locality Sketch...Gentral . TIN was discovered. in the Heemskirk district nea.rly 40 years ago, but, considering the time...this bulletin to investigate the resources of the district, to try a.nd determine what grounds existed for...essential that the geological structure of the district should be understood, as also the structure of...are discussed in the course of this report. The district to the north, comprising the North Heems~ kirk |  | | Book | | ROCKS OF THE MIOGEOSYNCLINE, 8 UNDERSTOOD, 3 LOWER DISTRIBUTION AND CLASSIFICATION, 1 1870 to 1903—Mining...130 128 129 Occurrence and Nomenclature, 90 LOWER TRIASSIC, Conglomerate, Tebak Formation, 87 ...TO LOWER MESOZOIC 187 GRANITE, Epizone, 185 209 Lower Paleozoic, 209 Upper Paleozoic to Lower Mesozoic...Petrology of the Dolerite, Subsurface Deposits, LOWER 200 MIDDLE TO UPPER TRIASSIC VOLCANISM, CENOZOIC...Conditions of Metamorphism, Structure, 290 Amphibolite, Geochemistry, Petrology, Pelitic Rocks, |
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