| Granite veins cut pelitic schists at a high angle but the veins are not folded, showing that the main schistosity predates emplacement. |
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| The prominent basement rocks of the Brumado area are Precambrian in age and consist dominantly of gneisses, schists, and amphibolite. |
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| The three mountainous areas consist of large cores of igneous rocks surrounded by larger areas of metamorphic rocks, mostly schists and gneiss. |
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| The major rock types in the Masasi area are granitoid gneisses, marbles, schists and quartzites. |
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| The light colored andradite varieties topazolite and demantoid occur mainly in serpentinites and chlorite schists. |
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| The Dzag schists to the north of the ophiolite zone have previously been interpreted as part of an accretionary wedge. |
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| These domes are composed of pelitic schists and gneisses folded around a core of K-feldspar granite and granitic gneiss. |
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| Abundant thin calcite and quartz veins cut the schists, and have been boudinaged and rotated parallel to the first cleavage. |
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| The Burd Gol melange is also the most highly metamorphosed unit locally containing amphibolite grade staurolite and kyanite schists. |
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| In the southern Siniscola schists, chloritoid and poikilitic garnet porphyroblasts have overgrown the earliest cleavage. |
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| Undated glaucophane schists in the suture zone in Transbaikalia confirm the operation of subduction processes. |
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| Schists and serpentines yield the demantoid and topazolite varieties of andradite. |
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| They are primarily quartzite, granite, and granitized schists. |
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| Foothills composed of Precambrian schists and gneisses lie west of the hogbacks, and the Great Plains physiographic province lies to the east of the Table Mountains. |
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| He showed that the great dislocation beneath the Moine Schists was an overthrust, but left open the question of what the original nature of the Moines had been. |
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| Millions of years ago the mica schists surrounding the old Brandberg West Mine became folded and concertinaed by enormous horizontal pressures. |
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| These Precambrian rocks are schists and phyllites, often much contorted and disturbed. |
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| The mountains are composed of granite, gneiss, marble, schists and quartzite. |
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| About 50 million years ago sedimentary rock was pressed against this granite, forming the schists of the eastern side. |
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| These are intermediate stages between cleaved tuffs and crystalline schists. |
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| Narrow bands of schist are interstratified with these limestones, and in turn narrow beds of limestone are interstratified with the schists. |
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| Quartzites and anthophyllite schists are also present in this zone, although they do not appear on the map because of the scale. |
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| Tin mineralization is focused within a chloritic, garnetiferous amphibolite unit within felsic mica schists. |
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| The schists also show that extreme deformation has occurred and mylonite bands are common. |
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| The gemstones are closely related to the contact between mafic schists and felsic gneisses and pegmatites. |
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| The basement is composed predominantly of hornblendic schists. |
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| The Eagle Lake property lies within the Wollaston domain and consists of metasedimentary gneisses and schists, including pelitic schists and gneisses with graphitic horizons. |
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| Among the crystalline schists of many regions, green beds or green schists occur, which consist of quartz, hornblende, chlorite or biotite, iron oxides, feldspar, etc. |
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| Schists are foliated rocks that are primarily composed of lamellar minerals such as micas. |
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| Geologically, the island consists of gneiss and argillaceous schists with occasional tufts and other sedimentary layers from which fossils have been recovered. |
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| I have not the least doubt of such facts occurring, from what I have seen of portions of fine chloritic schists being entangled in the midst of a gneiss district. |
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