Columbia, also known as Nuna or Hudsonland, is a hypothetical ancient supercontinent. It was first proposed by John J.W. Rogers and M. Santosh in 2002 [1] and is thought to have existed approximately 2,500 to 1,500 million years ago (Ma), in the Paleoproterozoic era.

2024年1月13日 · It is named "Columbia" because scientists posited that the landmass connected what is now eastern India with the Columbia basalts region in what is now the U.S., according to a 2017 study in...

2023年3月12日 · Columbia, also known as Nuna, is believed to have been one of the first supercontinents on Earth, and it played an essential role in the planet's geological history.

Map of the Nuna (also known as Columbia) supercontinent, illustrating the assembly of ancient landmasses from parts of North America, Siberia, Australia, and Antarctica, surrounded by a global ocean.

According to these researchers, the formation of these basins is associated with the break-up and assembly of supercontinents like the Columbia 55 and Rodinia, which hosted the Bundelkhand...

Available isotopic data suggest that the Precambrian basement elements of the northern parts of the Caledonide orogen in N America, Britain, Ireland, Greenland and Scandinavia comprise largely...

At peak accumulation, about 1.8 billion years ago, virtually all of Earth's land mass was joined to Columbia creating a surface estimated to have been about 8,000 miles long north-to-south and about 3,000 miles wide east-to-west. Included was Laurentia, Baltica, Siberia, Amazonia, Ukrainia, Australia, Kalaharia and North China.

The building blocks of the Columbia supercontinent according to Rogers, 1996; (a) Atlantica comprised of the cratonic elements of South America and western and central Africa; (b) Arctica comprised of Siberia, Greenland and cratonic North America; (c) Ur comprised of South Africa, Madagascar, E. Antarctic cratons, India and western Australia.

Columbia, also known as Nuna and Hudsonland, was one of Earth's ancient supercontinents. It was first proposed by J.J.W. Rogers and M. Santosh (2002) [1] and is thought to have existed approximately 2.5 to 1.6 billion years ( Ga) ago in the Paleoproterozoic Era.

2002年1月1日 · This paper proposes a configuration for Columbia based both on evidence of rifting and orogenic activity, compares Columbia with Pangea, briefly discusses models for the evolution of supercontinents, and then shows how the breakup of Columbia and rearrangement of the fragments formed Rodinia.