Книга: Hunt Thomas Sterry «On the Laurentian limestones of North America»

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• North America — North American. the northern continent of the Western Hemisphere, extending from Central America to the Arctic Ocean. Highest point, Mt. McKinley, 20,300 ft. (6187 m); lowest, Death Valley, 276 ft. (84 m) below sea level. 400,000,000 including… …   Universalium

• Silurian Period — Interval of geologic time, 443–417 million years ago. The third period of the Paleozoic Era, the Silurian follows the Ordovician Period and precedes the Devonian. It marks the first appearance of land plants and jawed fishes. The continents were… …   Universalium

• Ordovician Period — Interval of geologic time, 490–443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated… …   Universalium

• Laurentia — For the use of the surname Laurentia , see Laurentum. Laurentia, also called the North American craton. Laurentia (North American craton) is a large area of continental craton, which forms the ancient geological core of the North American… …   Wikipedia

• Cambrian Period — Oldest time division of the Paleozoic Era. During the Cambrian, 543–490 million years ago, there were widespread seas and several scattered landmasses. The largest continent was Gondwana. The average climate was probably warmer than today, with… …   Universalium

• Mohawk River — For other uses, see Mohawk River (disambiguation). Coordinates: 42°45′39″N 73°41′13″W / 42.76083°N 73.68694°W / 42.76083; 7 …   Wikipedia