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Geologic map of North America. The geology of North America is a subject of regional geology and covers the North American continent, the third-largest in the world. Geologic units and processes are investigated on a large scale to reach a synthesized picture of the geological development of the continent. The divisions of regional geology are ...
UN M49 code. 019 – Americas 001 – World. 1990s CIA political map of the Americas in Lambert azimuthal equal-area projection. The Americas, sometimes collectively called America, [ 5 ][ 6 ][ 7 ] are a landmass comprising the totality of North America and South America. [ 8 ][ 9 ][ 10 ] The Americas make up most of the land in Earth 's ...
Miocene. o. Vertical axis: millions of years ago. The Miocene (/ ˈmaɪ.əsiːn, - oʊ -/ MY-ə-seen, -oh-) [6][7] is the first geological epoch of the Neogene Period and extends from about 23.03 to 5.333 million years ago (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words μείων (meíōn ...
The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [5] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...
Humans crossed over this bridge and started becoming abundant in North America between 11,000 and 12,000 years ago. [149] Despite withstanding the fluctuating climate and concomitant advance and retreat of glaciers, around 10,000 years ago around 32 genera of large mammals suddenly became extinct. [150]
With an estimated population of 580 million and an area of 24,709,000 km 2 (9,540,000 mi 2), the northernmost of the two continents of the Western Hemisphere [1] is bounded by the Pacific Ocean on the west; the Atlantic Ocean on the east; the Caribbean Sea on the south; and the Arctic Ocean on the north. The northern half of North America is ...
A map of North America's physical, political, and population characteristics as of 2018. North America is a continent [b] in the Northern and Western Hemispheres. [c] North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean.
The Ordovician (/ ɔːrdəˈvɪʃi.ən, - doʊ -, - ˈvɪʃən / or-də-VISH-ee-ən, -doh-, -VISH-ən) [9] is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.6 million years from the end of the Cambrian Period 485.4 Ma (million years ago) to the start of the Silurian Period 443.8 Ma. [10]