The oldest angiosperm--a tricarpous female reproductive fossil from western Liaoning Province, NE Ch

来源 :中国科学:地球科学英文版 | 被引量 : 0次 | 上传用户:tengyuansai
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
石块植物女性繁殖机关各从 Yixian 形成与 tricarpous 被收集, Chaoyang 区域,西方的辽宁省。这里的 Yixian 形成的地质的年龄被相信是迟了的侏罗记,它把这石块放作为当前知道的最旧的被子植物。它的词法人物从另外的已知的被子植物是不同的它有 3 个卵巢,有一种终端式样的各个和顶端的耻辱的繁殖机关。9 个如此的机关填写聚伞花序。因为这词法安排对这植物唯一,一个新类和种被建立了, namedChaoyangia liangii 情报。et sp。nov。
其他文献
Low magnetic susceptibility, low Sr content and hence high Rb/Sr ratio in the lake sediment sequence indicate a weak chemical weathering process under arid and
The Tieluping silver deposit, located in the NE-trending faults within the metamorphic basement of the Xiong’er Mountain, is a typical altered fracture type de
Zircon U-Pb ages are reported for three samples of intrusive rocks in Khondalite series in the Sanggan area, North China craton. The age of meta-granite is date
The seasonal variation of inertia gravity-wave activity in the lower stratosphere (17-24 km) over Beijing is studied based on the high vertical resolution radio
Dated isotopic ages for 15 alkaline intrusives in the Yanliao-Yinshan area, ranging from 268 to 190 Ma, ten of which are from 250 to 208 Ma, indicate that most
【正】As well known, the methods of remote sensing and Bowen Ratio for retrieving surface flux are based on energy balance closure; however, in most cases, surf
In a survey on the Yellow Sea and the East China Sea on August 20-30 of 1999, we found a hypoxic zone (<2 mg/L) of 13700 km2 with an average thickness of 20m at
Using cooling curves of K-feldspars obtained by using specific <sup>40</sup>Ar/<sup>39</sup>Ar stepe heating procedure and multiple diffusion domain modeling (MD
Broadband three-component seismic data recorded by Beijingstation (BJI) of CDSN were used to calculate P-wave polarization of teleseismic events. These polariza
From Yulin, which is located in the transitional zone between the Loess Plateau and the Mu Us desert, to Weinan in the southernmost part of the Loess Plateau, 9