This fossil bed is remarkable for deuce reasons. First off because a age of the places (Devonian, about 410 MYBP) makes this one of a earliest web sites anywhere containing terrestrial (when opposed to marine) fossils, coinciding by owning a earliest stages of the colonization of l& by plants and animals. Second, these cherts are illustrious for their exceptional state of ultrastructural preservation, with single cell bulwarks well seeable around polished specimens. Stomata have been counted, and lignin remains detected in a plant lesson, & the breathing apparatus of trigonotarbids (referred to as book lungs) can be seen within cross-sections. Threads assumed to become fungous hyphae can be seen typing plant poop, either acting when decomposers or even mycorrhizal symbionts.

It seems that silica-rich water system rose chop-chop & petrified this early terrestrial ecosystem in situ almost instantly. Although a fossils come famed, a actual fossil bed lies under at least Single metre of overburden, in one microscopic field (which is besides protected by existence an SSSI), so is profits unprocurable to collectors.