| 单词 | bioturbation |
| 释义 | BETA Examples ofbioturbationDictionary> Examples ofbioturbation bioturbationisn’t in the Cambridge Dictionary yet. You can help! Add a definition Wherebioturbationis absent, the finer units consist of millimetre-scale bedding between siltstone and fine-grained sandstone. From theCambridge English Corpus Bioturbationis common, but occurs almost exclusively in the interbedded mudstones: 23 % of mudstone beds contain bioturbation, compared with 1.6 % of the sandstones. From theCambridge English Corpus Sedimentary structures were rarely observed except for some slump-structures, centimetre-sized ripples andbioturbation. From theCambridge English Corpus The presence of crinoid fragments indicates an unequivocal marine origin for these sediments, and this is strongly supported by the presence ofbioturbationand glauconite. From theCambridge English Corpus Intense mottling related tobioturbationindicates a slow rate of deposition. From theCambridge English Corpus The sediments, their contained fauna, as well as the intensebioturbation, indicate a well-oxygenated sea floor, below, but probably close to, storm wave-base. From theCambridge English Corpus Bioturbationis abundant in the shale as both horizontal and vertical exichnial traces. From theCambridge English Corpus In conjunction with animal evolutionbioturbationhas changed through time with great consequences for the preservation and behaviour of sediments. From theCambridge English Corpus Due to post-depositional processes such as chemical weathering andbioturbation, the original patterns are often heavily 'obscured' or have disappeared. From theCambridge English Corpus These facies associations, and abundantbioturbation, indicate an environment with a strong marine influence, and a proximal source of coarse grained sediment. From theCambridge English Corpus There was no significantbioturbationnoted in the mat, so heavy predation by macroscopic organisms seems unlikely. From theCambridge English Corpus No marine fossils were found in the logged section, nor was there any clear evidence ofbioturbation. From theCambridge English Corpus As the basin is anoxic, or lacks oxygen, no life is present, so there has been nobioturbationof the sediments. From theCambridge English Corpus Bioturbationis scarce, and concentrated to the upper, more fine-grained parts of the sandstone beds as epichnial ridges and endichnial traces. From theCambridge English Corpus Bioturbationis common in both mudstones and sandstones, including vertical and horizontal sand-filled burrows, and bioturbation is evident in some granulestones. From theCambridge English Corpus Based on fossils andbioturbation, this is an open marine facies association. 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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