Phanerozoic (541 Ma to present) and Precambrian ( to ) had primarily passive margins and detrital zircons (and orogenic granites), whereas the tenure of Pangaea contained few. Matching edges of continents are where passive margins form. The edges of these continents may rift. At this point, seafloor spreading becomes the driving force. Passive margins are therefore born during the break-up of supercontinents and die during supercontinent assembly. Pangaea's supercontinent cycle is a good example of the efficiency of using the presence or lack of these entities to record the development, tenure, and break-up of supercontinents. There is a sharp decrease in passive margins between 500 and during the timing of Pangaea's assembly. The tenure of Pangaea is marked by a low number of passive margins during 336 to and its break-up is indicated accurately by an increase in passive margins.
Phanerozoic (541 Ma to present) and Precambrian ( to ) had primarily passive margins and detrital zircons (and orogenic granites) whereas the tenure of Pangaea contained few Matching edges of continents are where passive margins form The edges of these continents may rift At this point seafloor spreading becomes the driving force Passive margins are therefore born during the break-up of supercontinents and die during supercontinent assembly Pangaea's supercontinent cycle is a good example of the efficiency of using the presence or lack of these entities to record the development tenure and break-up of supercontinents There is a sharp decrease in passive margins between 500 and during the timing of Pangaea's assembly The tenure of Pangaea is marked by a low number of passive margins during 336 to and its break-up is indicated accurately by an increase in passive margins