网站首页  词典首页

请输入您要查询的词汇:

 

词汇 microfossil
释义

Definition of microfossil in English:

microfossil

noun
  • A fossil or fossil fragment that can only be seen with a microscope.

    微体化石,微化石

    Example sentencesExamples
    • They are generally common microfossils in Phanerozoic marine sedimentary rocks, at least from the early Middle Ordovician onward.
    • Micropalaeontology is the study of microfossils, a microfossil being any fossil that is best studied by means of a microscope.
    • Also, other microfossils such as diatoms, radiolaria, and planktonic and benthic foraminifera are useful in certain parts of the Palaeocene.
    • Sediments from the Oliva host contained coarse sand and microscopic shell fragments but no complete microfossils.
    • During that first year in the oil business, Smith shared an office with a paleontologist who worked with the microfossils (mostly foraminifera) that are used to age-date the rock units of the Texas Gulf Coast.
    • Conodont elements, the disarticulated bony remains of the complex conodont oral apparatus, are found as microfossils by the tens of thousands in virtually every Paleozoic marine sediment, everywhere in the world.
    • A total of 772 samples have been analysed for microfossils from the proximal Cretaceous succession of the Orange Basin during the past 10 years.
    • An astonishing diversity of unicellular microfossils has been discovered in 800-million-year-old rocks from Victoria Island.
    • Microfossil assemblages from rare black and grey clays in this succession contain only a variety of seeds, Microcarpolithes hexagonalis and megaspores, and there are neither foraminifera nor other marine microfossils.
    • Once they have sketched the outlines of the basic chronology, geochemistry and geography, the rest will probably fall, microfossil by microfossil.
    • The key to understanding the early evolution of eukaryotes lies in the Proterozoic fossil record, especially microfossils.
    • To obtain a precise stratigraphic range for the radiolarian fauna, biostratigraphic analysis on the co-occurring microfossils, conodonts, chitinozoans, and graptolites, was also carried out.
    • Nor were these the only marine groups who left Jurassic microfossils.
    • The dissolution of limestones in weak acid is now a standard palaeontological laboratory technique, and has been used extensively to isolate phosphatic microfossils of all types from Paleozoic carbonates.
    • A mid-Albian age has been recorded from marine planktonic microfossils found in limestones at the lower levels of the Las Chilcas Formation.
    • Brasier et al., however, questioned the biogenic validity of microfossils from the early Archaean Apex Chert in Australia and suggested that they may be artefacts created by abiogenic processes.
    • The spherules were previously interpreted as microfossils (Vallenia sp.) because of their spheroidal shapes and inclusions of carbonaceous matter.
    • The formation has yielded numerous fossils of stromatolites in addition to microfossils.
    • These are the finest ultrastructure details thus far found in microbes preserved by hydrothermal mineralization, and can be used as an aid to identify microfossils.
    • Boundaries between the formations are all conformable but, in the absence of ammonites or microfossils, age control is not precise.

Definition of microfossil in US English:

microfossil

nounˈmīkrōˌfäs(ə)l
  • A fossil or fossil fragment that can be seen only with a microscope.

    微体化石,微化石

    Example sentencesExamples
    • Brasier et al., however, questioned the biogenic validity of microfossils from the early Archaean Apex Chert in Australia and suggested that they may be artefacts created by abiogenic processes.
    • Nor were these the only marine groups who left Jurassic microfossils.
    • The key to understanding the early evolution of eukaryotes lies in the Proterozoic fossil record, especially microfossils.
    • Once they have sketched the outlines of the basic chronology, geochemistry and geography, the rest will probably fall, microfossil by microfossil.
    • The dissolution of limestones in weak acid is now a standard palaeontological laboratory technique, and has been used extensively to isolate phosphatic microfossils of all types from Paleozoic carbonates.
    • An astonishing diversity of unicellular microfossils has been discovered in 800-million-year-old rocks from Victoria Island.
    • The spherules were previously interpreted as microfossils (Vallenia sp.) because of their spheroidal shapes and inclusions of carbonaceous matter.
    • During that first year in the oil business, Smith shared an office with a paleontologist who worked with the microfossils (mostly foraminifera) that are used to age-date the rock units of the Texas Gulf Coast.
    • Also, other microfossils such as diatoms, radiolaria, and planktonic and benthic foraminifera are useful in certain parts of the Palaeocene.
    • Boundaries between the formations are all conformable but, in the absence of ammonites or microfossils, age control is not precise.
    • To obtain a precise stratigraphic range for the radiolarian fauna, biostratigraphic analysis on the co-occurring microfossils, conodonts, chitinozoans, and graptolites, was also carried out.
    • They are generally common microfossils in Phanerozoic marine sedimentary rocks, at least from the early Middle Ordovician onward.
    • The formation has yielded numerous fossils of stromatolites in addition to microfossils.
    • These are the finest ultrastructure details thus far found in microbes preserved by hydrothermal mineralization, and can be used as an aid to identify microfossils.
    • Micropalaeontology is the study of microfossils, a microfossil being any fossil that is best studied by means of a microscope.
    • Sediments from the Oliva host contained coarse sand and microscopic shell fragments but no complete microfossils.
    • A mid-Albian age has been recorded from marine planktonic microfossils found in limestones at the lower levels of the Las Chilcas Formation.
    • Conodont elements, the disarticulated bony remains of the complex conodont oral apparatus, are found as microfossils by the tens of thousands in virtually every Paleozoic marine sediment, everywhere in the world.
    • Microfossil assemblages from rare black and grey clays in this succession contain only a variety of seeds, Microcarpolithes hexagonalis and megaspores, and there are neither foraminifera nor other marine microfossils.
    • A total of 772 samples have been analysed for microfossils from the proximal Cretaceous succession of the Orange Basin during the past 10 years.
随便看

 

春雷网英语在线翻译词典收录了464360条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2000-2024 Sndmkt.com All Rights Reserved 更新时间:2024/12/28 0:38:16