Ciri dan struktur tasik danau toba

Explanation:

Danau Toba (bahasa Indonesia: Danau Toba) adalah danau alami besar di Sumatera Utara, Indonesia, yang menempati kaldera sebuah gunung berapi. Danau ini terletak di tengah bagian utara pulau Sumatra, dengan ketinggian permukaan sekitar 900 meter (2.953 kaki), danau ini membentang dari 2,88 ° N 98,52 ° E hingga 2,35 ° N 99,1 ° E. Danau ini memiliki panjang sekitar 100 kilometer (62 mil), lebar 30 kilometer (19 mil), dan kedalaman hingga 505 meter (1.657 kaki). Ini adalah danau terbesar di Indonesia dan danau vulkanik terbesar di dunia. [1] Kaldera Danau Toba adalah salah satu dari sembilan belas Geopark di Indonesia, [2] yang diakui pada Juli 2020 sebagai salah satu dari Global Geopark UNESCO. [3] [4] [5]

Danau Toba

Danau Toba (Bahasa Indonesia)

Tao Toba (Batak Toba)

early human migrations are the earliest migrations and expansions of archaic and modern humans across continents and are believed to have begun approximately 2 million years ago with the out of africa migration of homo erectus. this initial migration was followed by other archaic humans including h. heidelbergensis, which lived around 500,000 years ago and was the likely ancestor of both denisovans and neanderthals. early hominids were said to have "crossed land bridges that were eventually covered in water" .

within africa, homo sapiens dispersed around the time of its speciation, roughly 300,000 years ago.the "recent african origin" paradigm suggests that the anatomically modern humans outside of africa descend from a population of homo sapiens migrating from east africa roughly 70,000 years ago and spreading along the southern coast of asia and to oceania before 50,000 years ago. modern humans spread across europe about 40,000 years ago.

the migrating modern human populations are known to have interbred with local varieties of archaic humans, so that contemporary human populations are descended in small part (below 10% contribution) from regional varieties of archaic humans.

after the last glacial maximum, north eurasian populations migrated to the americas about 20,000 years ago. northern eurasia was peopled after 12,000 years ago, in the beginning holocene. arctic canada and greenland were reached by the paleo-eskimo expansion around 4,000 years ago. finally, polynesia was peopled after 2,000 years ago, by the austronesian expansion.

president franklin roosevelt supported the tva as part of his first new deal measures approved by congress in 1933. this new agency was designed to control floods, produce electric power, and improve the lives of people living in the tennessee valley. the tva accomplished many of these goals despite problems.