0 a type of rock or soil layer in which fossils of a particular group of organisms are found, which come from a particular time in the Earth's history:
The rock yielded trilobites representative of the Solenopleuropsis biozone.
The limestone contains Acadoparadoxides mureroensis, index trilobite of the earliest Middle Cambrian biozone in Spain.
No evidence of the Pardailhania biozone has been found there.
The base of the section belongs to the reticulifera subzone, while its top belongs to the bergstroemi biozone, early Nabala to Pirgu in age.
