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Solidified lava flow in Hawaii Sedimentary layers in Badlands National Park, South Dakota Metamorphic rock, Nunavut, Canada. Geology (from Ancient Greek γῆ (gê) 'earth' and λoγία () 'study of, discourse') [1] [2] is a branch of natural science concerned with the Earth and other astronomical objects, the rocks of which they are composed, and the processes by which they change over time. [3]
Intended for primary and secondary school level readers, the first books were field guides illustrated by James Gordon Irving, with such titles as Birds (1949), Insects (1951), and Mammals (1955). The series later expanded beyond identification guides to cover a wider range of subjects, such as Geology (1972), Scuba Diving (1968) , and Indian ...
Children's books about geology (1 C) G. Geology textbooks (2 P) P. Paleontology books (2 C, 31 P) Books about petroleum (3 C, 11 P) Pages in category "Geology books"
Also called Indianite. A mineral from the lime-rich end of the plagioclase group of minerals. Anorthites are usually silicates of calcium and aluminium occurring in some basic igneous rocks, typically those produced by the contact metamorphism of impure calcareous sediments. anticline An arched fold in which the layers usually dip away from the fold axis. Contrast syncline. aphanic Having the ...
The Childcraft series was originally created in 1934 by W. F. Quarrie & Company, then publishers of the World Book encyclopedia. The series' title was Childcraft – The How and Why Library. Childcraft was created as a sort of encyclopedia for young children. With simple texts and illustrations, the volumes were designed to make learning fun.
A geologist is a scientist who studies the structure, composition, and history of Earth.Geologists incorporate techniques from physics, chemistry, biology, mathematics, and geography to perform research in the field and the laboratory.
Igneous rock (derived from the Latin word igneus, meaning of fire, from ignis meaning fire) [9] is formed through the cooling and solidification of magma or lava. This magma may be derived from partial melts of pre-existing rocks in either a planet's mantle or crust. Typically, the melting of rocks is caused by one or more of three processes ...
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