First occurrence of acanthodian microfossils from the early devonian of lijiang , yunnan , china 泥盆世棘魚類微體化石的首次報(bào)道
The hard coats of spores and pollen grains are preserved better , forming microfossils 孢子和花粉粒的堅(jiān)硬外殼被完好保留下來形成微化石。
Our oldest fossils date to roughly 3 . 5 billion years ago , and consist of bacteria microfossils 我們的最舊的化石約會(huì)對(duì)大致3 . 5十億年前,和包括細(xì)菌microfossils 。
In the summer of 2003 we began to zero in on one microfossil type whose complex morphological characteristics particularly intrigued us 2003年夏天,我們開始瞄準(zhǔn)一種微化石的類型,其復(fù)雜的形態(tài)特徵特別引起我們興趣。
Our initial probes suggested that a relatively thin sedimentary layer , which is black in color , would be the most promising for finding a variety of microfossils 我們的初步探查顯示,有一層黑而薄的沉積,最有希望找到各式各樣的微化石。