trace fossil

基本解釋

Mammal-like fossil in Late Paleozoic and trace fossil in Mesozoic around Fengmenkou area have the significance of global correlation.
封門口一帶的晚古生代似哺乳類動(dòng)物化石和中生代的遺跡化石等具有世界對(duì)比意義。
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The ichnofacies is the grouping of characteristic trace fossil association tending to rscirrence through a rather long interval of geologic time, and their environmental implication.
遺跡相是指一組具有特征的遺跡化石組郃，在一段相儅長(zhǎng)的地質(zhì)時(shí)期中不斷的重眡以及它們的環(huán)境意義。
Dr. Tattersall believes the leap to humans may have been brought about very suddenly, perhaps by a few critical genetic changes, which is why the transition is so hard to trace in the fossil record.
塔特薩爾博士認(rèn)爲(wèi)，轉(zhuǎn)變到人類的飛躍産生已經(jīng)很突然，或許由於幾個(gè)重要的基因變化。這就是爲(wèi)什麼這個(gè)轉(zhuǎn)變?cè)诨涗浹e很難找到。

Ms Werning therefore decided to trace the phenomenon of rapid growth back as far as she could in the fossil record, by examining the bones of a wide variety of species.
ECONOMIST: Or, rather, the dinosaur and the crocodile

the fossilized remains of a track, trail, footprint, burrow, etc, of an organism