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以往发表的年代地层数据都是以Ma形式出现,以关键物种的首现面和末现面来界定的。一般而言,这些年龄是在用某种方法确定的某两个层的年龄基础上通过插值获得的,很大程度上仍然是估计值,而不是可以检验的科学结论。我们需要的是一个可以评价的、剖面重现的、标本重现的而且插值方法是经过严格检验的数据库。图形对比技术正是一个有用的方法,它可以综合众多剖面的分散分布的事件,并可以验证这些事件的顺序和年代。图形对比技术是一个定量的、非统计的方法,可以判别两个剖面之间存在的同时代关系。物种时限和非生物事件投点到X/Y图解上,时限可以通过对比线综合到单个的时间尺度上。其他剖面的数据通过重复以上过程把每个剖面的数据综合进来。获得的时限通过评价有这些物种出现的图形解而得到验证。Aptian阶(约124~112 Ma)时期环境发生巨大变化,用来确定Aptian阶的许多关键生物事件和年代地层事件并不都出现在同一个剖面。因此,这些事件的相对年龄始终是不确定的,也不是相关的。两个事件被提出来用于界定Aptian 阶的底界,包括菊石Deshayesites tuarkyricus 和磁极性带CM0。然而这两个事件标准地层剖面相隔600 km。图形对比显示这两次事件出现在7 万年间隔内。通过这一方法,来自23 条Barremian Aptian Albian
Previously published chronostratigraphic data were all presented in the form of Ma, defined by the first and last appearance of the key species. In general, these ages are interpolated based on the ages of two of the tiers determined by a certain method and are largely still estimates, not verifiable scientific conclusions. What we need is an evaluable, profiled, specimen reproducible and well-interpolated database. Graphical contrasting techniques are a useful way to synthesize scatter-distribution events across many profiles and to verify the order and age of these events. Graphical contrast technology is a quantitative, non-statistical method that determines the contemporaneous relationship between two profiles. Species timeframes and non-biological events are cast onto X / Y plots, and time frames can be integrated into individual time scales through contrast lines. Data for other sections The data for each section is integrated by repeating the above procedure. The time frame obtained is verified by evaluating the graphical solution of the occurrence of these species. The environment of the Aptian (~ 124-112 Ma) period has undergone tremendous changes, and many of the key biological events and dating used to determine the Aptian order do not appear on the same profile. Therefore, the relative age of these incidents is always uncertain and not relevant. Two events were proposed to define the bottom boundary of the Aptian order, including the Deshayesites tuarkyricus and the magnetic polarity bands CM0. However, the standard stratum profiles of these two events are separated by 600 km. Graphical comparison shows that these two incidents occurred in the interval of 70,000 years. By this method, come from 23 Barremian Aptian Albian