1. phanerozoic - Noun
2. phanerozoic - Adjective
3. Phanerozoic - Proper noun
the period from about 540 million years ago until the present, a period when abundant life existed
Source: WordNetAs of 2008, the ICS is nearly finished a task begun in 1974, subdividing the Phanerozoic eonothem into internationally accepted stages using two types of benchmark. Source: Internet
However, even after accounting for sampling bias, there does appear to be a gradual decrease in extinction and origination rates during the Phanerozoic. Source: Internet
Phanerozoic (540 Ma to present) and Precambrian ( 4.6 Ga to 540 Ma ) had primarily passive margins and detrital zircons (and orogenic granites ), whereas the tenure of Pangaea contained few. Source: Internet
A new model for atmospheric oxygen over Phanerozoic time. Source: Internet
Huxley was wrong to pitch the loss of orders in the Phanerozoic as low as 7%, and he did not estimate the number of new orders which evolved. Source: Internet
Phanerozoic ironstones generally have a different genesis. Source: Internet