paleocontinent was what the landmass was called when all the continents were one.
what was the landmass called when all the continents were one?
paleocontinent
bullet::::- 1907 – bertram boltwood proposes that the amount of lead in uranium and thorium ores might be used to determine the earth's age and crudely dates some rocks to have ages between 410–2200 million years





















































bullet::::- 1911 – arthur holmes uses radioactivity to date rocks, the oldest being 1.6 billion years old





















































bullet::::- 1912 – alfred wegener proposes that all the continents once formed a single landmass called pangaea that broke apart via continental drift





















































bullet::::- 1912 – george barrow maps zones of metamorphism (the barrovian sequence) in southern scotland
timeline of geology
during the mid-paleozoic, the san juan basin was part of the ancient landmass called "laurentia;" this was a supercontinent that contained much of current-day north america. the ancient landmass called "gondwana" contained most of the southern continents, e.g. south america and africa. during the late-mississippian (~320 million years ago), the landmasses of laurentia and gondwana collided to form the giant landmass of "pangea". this continental collision resulted in several pivotal orogenic (mountain building) episodes.
san juan basin