You searched for: “diachronism
diachronism (s) (noun) (no pl)
1. The existence of a geological feature that transgresses palaeontological zones: An example of diachronism is a great divergence between the lithological and chronological classifications.
2. The existence within a single geologic formation of regions of rock that were laid down at different times: Diachronism can be exemplified by a sea that gradually covered a landmass.
This entry is located in the following units: chrono-, chron- (page 6) dia-, di- (page 2) -ism, -ismus (page 15)