| 单词 | ignimbrite |
| 释义 | BETA Examples ofignimbriteDictionary> Examples ofignimbrite ignimbriteisn’t in the Cambridge Dictionary yet. You can help! Add a definition The presence of banded pumice near the top defines a compositional zonation of theignimbrite. From theCambridge English Corpus The rhyolite has the form of a variably welded and massive, crystal-richignimbriteand associated non-welded pyroclastic deposits. From theCambridge English Corpus The individualignimbritesequences are up to 200 m thick. From theCambridge English Corpus Where theignimbriteis not welded it varies from white to orange, possibly thermal, colouration. From theCambridge English Corpus This is overlain by a thin lenticularignimbriteflow-unit draped by a fine ash layer, and buried by thick massive lapilli-tuff. From theCambridge English Corpus In each formation, theignimbriteveneers locally grade laterally into more restricted valley-fills (predominantly of pumiceous massive lapilli-tuff facies) within small palaeo-wadis. From theCambridge English Corpus The formation is vertically zoned with the appearance of banded and mafic pumices approximately 8 cm above the base of theignimbrite. From theCambridge English Corpus Widely dispersed plinian-type pumice fall deposits andignimbriteare characteristic products of both explosive cycles. From theCambridge English Corpus These larger volume eruptions are dominated byignimbrite. From theCambridge English Corpus The syn-rift sediments were sealed by a regionally correlatedignimbritethat in turn was offset by late second-phase faulting. From theCambridge English Corpus Theignimbritehas a simple sheet-like geometry, but exhibits a complex internal stratigraphy. From theCambridge English Corpus The base of theignimbriteis commonly fine-grained and stratified, and grades upwards into massiveignimbrite. From theCambridge English Corpus Concentrations of pumice occur locally in the upper 20-30 cm of theignimbrite. From theCambridge English Corpus Elsewhere, mudstone contains poorly preserved isolated plant remains, andignimbriteand lava flow tops can include some quite sizeable wood debris. From theCambridge English Corpus A huge range of lithologies is described and their formation explained: peperite, breccia, agglomerate,ignimbrite, to name but four. From theCambridge English Corpus The alkali basalt lithic breccias pass abruptly upwards into banded pumice-bearingignimbrite. From theCambridge English Corpus A pink, beige weathering welded rhyoliticignimbriteforms a conspicuous cap on many hills of the area. 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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