首页
登录
职称英语
In 1831 when Smith was finally recognized by the Geological Society of Londo
In 1831 when Smith was finally recognized by the Geological Society of Londo
游客
2025-02-05
21
管理
问题
In 1831 when Smith was finally recognized by the Geological Society of London as the "father of English geology," it was not only for his maps but also for something even more important. Ever since people had begun to catalog the strata in particular outcrops, there had been the hope that these could somehow be used to calculate geological time.
But as more and more accumulations of strata were cataloged in more and more places, it became clear that the sequences of rocks sometimes differed from region to region and that no rock type was ever going to become a reliable time marker throughout the world.
Even without the problem of regional differences, rocks present a difficulty as unique time markers.
Quartz is quartz
—a silicon ion surrounded by four oxygen ions—there’s no difference at all between two-million-year-old Pleistocene quartz and Cambrian quartz created over 500 million years ago. [br] Which of the sentences below best expresses the essential information in the highlighted sentence in paragraph 3? Incorrect choices change the meaning in important ways or leave out essential information.
选项
A、The discovery of regional differences in the sequences of rocks led geologists to believe that rock types could some day become reliable time markers.
B、Careful analysis of strata revealed that rocks cannot establish geological time because the pattern of rock layers varies from place to place.
C、Smith’s catalogs of rock strata indicated that the sequences of rocks are different from place to place and from region to region.
D、Because people did not catalog regional differences in sequences of rocks, it was believed that rocks could never be reliable time markers.
答案
B
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3944554.html
相关试题推荐
In1831whenSmithwasfinallyrecognizedbytheGeologicalSocietyofLondo
Itisgenerallyagreedthatsocietybenefitsfromtheworkofitsmembers.C
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
"HewWomenoftheIceAge"Thestatusofwomeninasocietydependsinlarge
AgriculturalSocietyinEighteenth-CenturyBritishAmericaP1:Throughouttheco
随机试题
LeMorteD’ArthurisafamousworkbyA、JohnMilton.B、VenerableBede.C、ThomasM
挡烟垂壁的具体要求正确的是()。A.卷帘式挡烟垂壁的挡烟部件由两块或两块以
施工项目质量的影响因素有人、机、料、法、环境因素等。()。
慢性消耗性疾病患者的面容与表情是A.兴奋不安 B.表情痛苦 C.口唇干裂
不锈钢的防腐蚀性能特点是()。A、铬含量高,抗腐蚀性差 B、铬含量高,抗腐蚀性
小明近期情绪低落,思维迟缓,活动减少,甚至产生自杀念头。他的主要问题是( )A
儿童不能遵守公认的正常行为规范和道德标准,不能正常与人交往和参与学习的行为等表现
对于经电缆、管道等方式输送进出口的货物,如水、原油、电力、天然气等,应该由经营人
根据税收征收管理法律制度的规定,下列各项中,属于税款征收措施的是()。A.税务
防水混凝土试配时的抗渗等级应比设计要求提高( )MPa。A.0.1 B.0.2
最新回复
(
0
)