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The map of North America with the Western Interior Seaway during the Campanian. The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large inland sea that split the continent of North America into two landmasses for 34 million years.
The Mitchell Map. The Mitchell Map is a map made by John Mitchell (1711–1768), which was reprinted several times during the second half of the 18th century. The map, formally titled A map of the British and French dominions in North America &c., was used as a primary map source during the Treaty of Paris for defining the boundaries of the newly independent United States.
Marine clay is a type of clay found in coastal regions around the world. In the northern, deglaciated regions, it can sometimes be quick clay , which is notorious for being involved in landslides. Marine clay is a particle of soil that is dedicated to a particle size class, this is usually associated with USDA's classification with sand at 0 ...
Quick clay is a unique type of marine clay indigenous to the glaciated terrains of Norway, North America, Northern Ireland, and Sweden. [24] It is a highly sensitive clay, prone to liquefaction, and has been involved in several deadly landslides. [25]
Soon, Pangaea began to split up and North America began drifting north and westward. During the latter Jurassic, the floodplains of the western states were home to dinosaurs like Allosaurus, Apatosaurus, and Stegosaurus. During the Cretaceous, the Gulf of Mexico expanded until it split North America in half. Plesiosaurs and mosasaurs swam in ...
Des Barres made many maps of the Atlantic, mapping the coast of North America from Newfoundland to New York. His survey of the coast of Nova Scotia took approximately ten years due its length and intricacy. Des Barres was exasperated with the work stating "There is scarcely any known shore so much intersected with Bays, Harbours, and Creeks as ...
(Click to zoom) See legend below This is the legend for the North American geological map above. 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 ...
1823 Melish map of the United States and portions of Mexico from the Atlantic Ocean to the area west of the Rocky Mountains. John Melish (June 13, 1771 – December 30, 1822) was a Scottish mapmaker who published some of the earliest maps of the United States (US). In 1816, he created the first map of the United States extending to the Pacific ...