Assertion: diatom | /r/HasAspect | extensive fossil record
Facets:
Source sentences:
text: Because they are so easily preserved, diatoms have an extensive fossil record.
text: Because they are so easily preserved, diatoms have an extensive fossil record.
text: Diatoms have an extensive fossil record going back to the Cretaceous; some rocks are formed almost entirely of fossil diatoms, and are known as diatomite or diatomaceous earth.
text: Because diatoms have an extensive fossil record and a well-defined morphology, and because extant taxa are relatively easily cultured, making it possible to study phenotypic plasticity and perform breeding experiments, it is sometimes easier to apply one concept over another to any particular group of diatoms.