| 单词 | obsidian |
| 释义 | obsidian noun[U] uk/ɒbˈsɪd.i.ən/us/ɑːbˈsɪd.i.ən/atypeofalmostblackrockthat is likeglass 黑曜岩，黑曜石 Scientifica/Corbis Documentary/GettyImages Geology: types of rock
Examplesofobsidianobsidian In other words, as the rate of import increases, the proportion of theobsidianassemblage that is green decreases. From theCambridge English Corpus Theobsidiancobbles are easily detached from their parent rock by water erosion and carried downstream. From theCambridge English Corpus The former were possibly the same individuals who exchanged the greenobsidianto small centers and then to small sites. From theCambridge English Corpus Unworked and worked shell ornaments, shell "trumpets," and several clusters ofobsidianprojectile points were distributed following symmetrical patterns, mainly along the periphery. From theCambridge English Corpus The majority of the skull burials contain fewer than three objects, and only three of the 11 contexts containobsidian. From theCambridge English Corpus Not smooth but rather marred by dense, small pockmarks; its par ticulate inclusions are finer and denser than those of any otherobsidiansources. From theCambridge English Corpus Table 3 shows the quantities of transparent greenobsidianversus graystriated, clear gray, and black obsidian found at each of the three frontier sites. From theCambridge English Corpus The inclusion of more information on the other techniques that are applicable toobsidianstudies would have been very useful. From theCambridge English Corpus Both of these city-states provide evidence of specialized production, exchange, and consumption ofobsidiantools. From theCambridge English Corpus Forobsidian, sampling and analyzing all sources is a realistic goal. From theCambridge English Corpus Aspects of social organization are addressed through theobsidiandata, as are some insights into tool production and by whom. From theCambridge English Corpus All components of the rock, except theobsidiancobbles, are susceptible to weathering and are easily transformed into clay, as the matrix is quite porous. From theCambridge English Corpus City-states in the agricultural periphery and those with regionally restricted raw materials such asobsidianhad a greater emphasis on non-subsistence craft production. From theCambridge English Corpus Earlier work usingobsidianhydration dating is now questioned on methodological grounds. From theCambridge English Corpus Obsidianhydration dates were obtained from samples taken from 13 of the tombs, using methods current in the late 1970s. From theCambridge English Corpus These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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