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，我们开始瞄一种微石类型，其复杂形态特徵特别引起我们兴趣。

No creditable macrofossil record of the Fagaceae exists in the Cretaceous deposits and all the Cretaceous microfossil reports remain equivocal and require further study.

白垩纪尚无壳斗科可靠石记录，微石需要进一步研究才能确定亲缘关系以及古新世壳斗科已经分出两个类群。