Geology
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Geology is a branch of natural science concerned with the Earth and other astronomical bodies, the rocks of which they are composed, and the processes by which they change over time. The name comes fr
The Grand Canyon, Arizona, in March 2013
The Permian through Jurassic stratigraphy of the Colorado Plateau area of southeastern Utah is an example of both original horizontality and the law of superposition. These strata make up much of the famous prominent rock formations in widely spaced protected areas such as Capitol Reef National Park and Canyonlands National Park. From top to bottom: Rounded tan domes of the Navajo Sandstone; layered red Kayenta Formation; cliff-forming, vertically jointed, red
The mineral zircon is often used in radiometric dating.
The San Andreas Fault in California is a strike-slip fault
Paleontology
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Paleontology or palaeontology is the scientific study of the life of the past, mainly but not exclusively through the study of fossils. Paleontologists use fossils as a means to classify organisms, me
Bust of the paleontologist Georges Cuvier (left) and a cast skeleton of Palaeotherium magnum (named by Cuvier in 1804, right), Cuvier Museum of Montbéliard
The Dodo of Mauritius which has gone extinct in modern times
Cuvier's 1812 unpublished illustration of the extinct mammal Anoplotherium
Ernst Haeckel's "tree of life", illustrating an early understanding of how evolution relates to classification