| 单词 | tephra |
| 释义 | BETA Examples oftephraDictionary> Examples oftephra tephraisn’t in the Cambridge Dictionary yet. You can help! Add a definition A peat monolith was extracted and seen to contain threetephralayers. From theCambridge English Corpus In addition to providing chronological controls to date environmental change,tephramay also act as agents of environmental change. From theCambridge English Corpus On the damage caused by volcanic eruptions with special reference totephraand gases. From theCambridge English Corpus In these cases,tephramay provide abrupt environmental 'shocks' that can be used to assess sensitivity and robustness within environmental and cultural systems. From theCambridge English Corpus Numerous explosive eruptions producingtephraand ignimbrites were generated in the last 13 000 years. From theCambridge English Corpus This possibly contributed to the alteration of thetephradeposits but such effects are usually elementspecific. From theCambridge English Corpus In principle, several effects could have influenced and changed the original chemical composition oftephradeposits. From theCambridge English Corpus An individualtephralayer can be used to define a precise spatial reconstruction of an environment at what is effectively a moment in time. From theCambridge English Corpus Vegetation should not be harmed by a poroustephraground layer, which might also have facilitated drainage. From theCambridge English Corpus Samples were collected fromtephralayers, and if available, from lava flows as well. From theCambridge English Corpus A distinct change in the pollen assemblage occurs coincident with thetephrahorizon (or becomes evident immediately above it). From theCambridge English Corpus If ashfall, or the human fear of the consequences oftephrafalls, affected grazing, this may have led to abandonment of the land. From theCambridge English Corpus However, from the farmers' point of view,tephradeposition in this order of magnitude was not detrimental to their livelihood, as fluorosis was not mentioned as a hazard to livestock. From theCambridge English Corpus The presence of a mixture of euhedral and oval zircon grains in the host mudstone is taken to represent an input of both clastic material and re-workedtephra. 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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