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Topics related to "Mars apparently had continental drift Molten rock, movement long past, but"

drift drift
drift deposit of mixed clay, gravel, sand, and boulders transported and laid down by glaciers. Stratified, or glaciofluvial, drift is carried by waters flowing from the melting ice of a glacier. The flowing water sorts the particles, generally depositing layers of coarser particles nearer the point... Read more
continental continental
continental Continental Congress in the US, each of the three congresses held by the American colonies in revolt against British rule in 1774, 1775, and 1776 respectively. The second Congress, convened in the wake of the battles at Lexington and Concord, created a Continental Army, which fought and... Read more
volcano volcano
volcano vents or fissures in the earth's crust through which gases, molten rock, or lava , and solid fragments are discharged. Their study is called volcanology. The term volcano is commonly applied both to the vent and to the conical mountain (cone) built up around the vent by the erupted rock... Read more
plate tectonics plate tectonics
plate tectonics theory that unifies many of the features and characteristics of continental drift and seafloor spreading into a coherent model and has revolutionized geologists' understanding of continents, ocean basins, mountains, and earth history. Development of Plate Tectonics Theory The... Read more
Geochemical cycles Geochemical cycles
geochemical cycles A great variety of processes on Earth are cyclical in nature: in them, materials are transformed from their original state into other forms and eventually return to their original state. A fundamental picture of a global cycle of Earth materials is the so-called rock cycle that... Read more
moraine moraine
moraine , a formation composed of unsorted and unbedded rock and soil debris called till, which was deposited by a glacier . The till that falls on the sides of a valley glacier from the bounding cliffs makes up lateral moraines, running parallel to the valley sides. When two or more valley... Read more
George Washington De Long George Washington De Long
George Washington De Long , 1844-81, American arctic explorer, b. New York City, grad. Annapolis, 1865. In 1873 he was assigned to the Juniata, which was sent to the arctic to search for C. F. Hall 's expedition on the Polaris. In 1879, backed by the younger James Gordon Bennett and under the... Read more
drumlin drumlin
drumlin , smooth oval hill of glacial drift , elongated in the direction of the movement of the ice that deposited it. Drumlins, which may be more than 150 ft (45 m) high and more than 1/2 mi (.8 km) long, are common in New York, Wisconsin, Canada, and Northern Ireland.... Read more
Mountains Mountains
MOUNTAINS CONCEPT Among the most striking of geologic features are mountains, created by several types of tectonic forces, including collisions between continental masses. Mountains have long had an impact on the human psyche, for instance by virtue of their association with... Read more
continental drift continental drift
continental drift geological theory that the relative positions of the continents on the earth's surface have changed considerably through geologic time. Though first proposed by American geologist Frank Bursley Taylor in a lecture in 1908, the first detailed theory of continental drift was put... Read more

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