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Pangaea or Pangea (/ p æ n ˈ dʒ iː ə / pan-JEE-ə) [1] was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. [2] It assembled from the earlier continental units of Gondwana , Euramerica and Siberia during the Carboniferous approximately 335 million years ago, and began to break apart about 200 million years ...
It marked the end of the Cretaceous period, and with it the Mesozoic era, while heralding the beginning of the current era, the Cenozoic. In the geologic record , the K–Pg event is marked by a thin layer of sediment called the K–Pg boundary, Fatkito boundary or K–T boundary , which can be found throughout the world in marine and ...
Map of Pangaea with modern continental outlines. The supercontinent cycle is the quasi-periodic aggregation and dispersal of Earth's continental crust.There are varying opinions as to whether the amount of continental crust is increasing, decreasing, or staying about the same, but it is agreed that the Earth's crust is constantly being reconfigured.
c. 251.9 ± 0.15 Ma – End of Carboniferous and beginning of Permian Period. By this time, all continents have fused into the supercontinent of Pangaea. Seed plants and conifers diversify along with temnospondyls and pelycosaurs. c. 296 Ma – Oldest known octopus fossil. c. 295 Ma – Dimetrodon evolves. c. 280 Ma – First cycads evolve.
May: K.B. Aradsher H. Mama becomes Mayor of Karachi. [25] 1937 - May: Durgha Das B. Adwani becomes Mayor of Karachi. [25] 1938 - May: Hatim A. Alvi becomes Mayor of Karachi. [25] 1939 - May: R.K. Sidhwa becomes Mayor of Karachi. [25] 1940 Daily Jang newspaper begins publication. [26] May: Lalji Malhootra becomes Mayor of Karachi. [25] 1941 ...
The climate began to change when Laurentia entered the Mesozoic Era, this time period was dominated by a very large and lengthy monsoon season, because of Pangea. [14] At the end of the Cretaceous, seasons started to return and the Earth entered another ice age type event.
Gondwana formed part of Pangaea for c. 150 Ma [31] Gondwana and Laurasia formed the Pangaea supercontinent during the Carboniferous. Pangaea began to break up in the Mid-Jurassic when the Central Atlantic opened. [32] In the western end of Pangaea, the collision between Gondwana and Laurasia closed the Rheic and Palaeo-Tethys oceans.
Karachi was known as Khurachee Scinde (i.e. Karachi, Sindh) during the early British colonial rule. An old image of Karachi from 1889 Karachi map, 1911 St Joseph's Convent School, Karachi An image from 1930 of Elphinstone Street, Karachi Karachi Municipal Corporation Building, inaugurated in 1932