metasediment


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metasediment

[¦med·ə′sed·ə·mənt]
(geology)
A sediment or sedimentary rock which shows evidence of metamorphism.
(petrology)
Metamorphic rock formed from sedimentary rock.
References in periodicals archive ?
ROCKS OF SPITSBERGEN Carbonate rock 5 536,36 [km.sup.3] Sandstone & Psammite 4 211,46 [km.sup.3] Mudstone & Shale 1 945,44 [km.sup.3] Siltstone 1 232,27 [km.sup.3] Conglomerate & Breccia 660,73 [km.sup.3] Evaporite 134,45 [km.sup.3] Metaigneous rock 727,31 [km.sup.3] Quartzite 699,39 [km.sup.3] Metasediment 593,22 [km.sup.3] Schist 584,03 [km.sup.3] Marble 413,18 [km.sup.3] Amphibolite 346,41 [km.sup.3] Gneiss 270,03 [km.sup.3] Granite 521,18 [km.sup.3] Plutonite 117,06 [km.sup.3] Vulcanite 25,19 [km.sup.3] Unknown 534,65 [km.sup.3] Total 18 552,36 [km.sup.3]
As many are made on local igneous, metamorphic or metasediment lithologies (such as granite or metaquartzite) any attempt to trim, reuse or resharpen these implements is hindered by the hardness and brittle nature of the base-rock.
The study area is underlain by Precambrian metasediment, the Kyeonggi Metamorphic Complex, and several intrusive rocks [13].
Choices were also being made to focus on particular raw materials within the Ivane, with the assemblage dominated by the greenschists, metagreywacke and metabasalts to produce the larger tools of axes and waisted tools, and the conchoidally fracturing siliceous materials of quartz and baked siliceous metasediment to produce small flaked implements.
[21], on parent material in Cameron Highlands showed that they constituted a mixture of batolith granite, metasediment and other metamorphic rocks.
Southern Estonia comprises metamorphosed intermediate and mafic metavolcanics of the granulite facies, with a few metasediment localities.
The underlying bedrock consists of metasediment and volcanogenic rock, mafic and ultramafic intrusive rock, and mafic and ultramafic rock as a layered intrusion (Koljonen et al., 1992).
The observed conductive zone may correspond to sediment and metasediment deposit from the Lom series.
A more precise analysis shows that all the hot springs emerge in crystalline rocks, close to crystalline rock versus metasediment contacts, which seems to be (1) unfaulted contacts (18-21/29 hot springs, at Saint-Thomas-les-Bains, Thues-les-Bains, Canaveilles, and possibly Prats-Balaguer), (2) ductile fault juxtaposition (7/29 hot springs, exclusively at Vernet-les-Bains), and (3) brittle fault juxtaposition (1-3/29 hot springs, in Llo and possibly Prats-Balaguer).
The island (Figure 1) mostly consists of sedimentary rock that is graded into low grade metamorphic rock equivalent to metasediment and can generally be classified into two units based on age: conglomerate and interbedded layers of shale, siltstone, sandstone, and mudstone.
The drill hole exited Hobbs Pipe 1 near surface and entered a substantial alteration zone, progressing through garnet-pyroxene skarn (hosting the newly discovered mineralisation) and then into sericite-chlorite-quartz-sulphide (pyrite-arsenopyrite-pyrrhotitechalcopyrite) altered metasediment until end of hole.
Raw Material 03 04 06 07 08 10 11 BIF 0 0 0 0 0 0 0 Chalcedony <1 0 1.2 11.7 3.4 3.3 0 Chert <1 1.2 6.3 5.9 87.9 90.4 60.6 Dolerite 0 0 <1 0 0 <1 0 Glass 2.9 0 6.3 0 0 <1 0 Granite 12.2 7.2 <1 0 1.7 <1 0 Ironstone 0 0 0 0 0 0 0 Metasediment 0 0 <1 0 0 0 0 Quartz 0 0 1.6 0 0 0 0 Quartzite 0 0 6.7 0 0 0 0 Sandstone 0 0 0 0 0 0 0 Sedimentary 1.8 0 2.1 0 5.2 0 37.2 Silcrete <1 0 <1 1 <1 0 0 Rhyolite 81.7 91.5 73.6 87.2 <1 5.1 2 Raw Material 12 DE-SAS 1-4 BIF 0 38 Chalcedony <1 4.2 Chert 74.3 32.4 Dolerite 0 0 Glass 0 0 Granite 0 0 Ironstone 0 14.8 Metasediment 0 0 Quartz 0 8.4 Quartzite 0 0 Sandstone 0 1.4 Sedimentary 22.6 0 Silcrete 1.9 0.7 Rhyolite <1 0 Table 4.