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A geologic map or geological map is a special-purpose map made to show various geological features. Rock units or geologic strata are shown by color or symbols. Bedding planes and structural features such as faults , folds , are shown with strike and dip or trend and plunge symbols which give three-dimensional orientations features.
As a result, a key bed is useful for correlating sequences of sedimentary rocks over a large area. Typically, key beds were created as the result of either instantaneous events or (geologically speaking) very short episodes of the widespread deposition of a specific types of sediment. As the result, key beds often can be used for both mapping ...
The branch of geology and mineralogy that studies natural and artificial gemstones. gemstone. Also called a gem, fine gem, jewel, precious stone, or semi-precious stone. geogenic Of geologic origin – Resulting from naturally occurring geological processes. geologic map A special-purpose map made to show geological features. geological time scale
Digital geologic mapping is the process by which geological features are observed, analyzed, and recorded in the field and displayed in real-time on a computer or personal digital assistant (PDA). The primary function of this emerging technology is to produce spatially referenced geologic maps that can be utilized and updated while conducting ...
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 synthesized picture of the geological development of the continent. The divisions of regional geology are ...
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Ogden Tweto (1912 - 1983) created the now-classic Geologic Map of Colorado [1] which is held as one of the finest examples of a state geologic map. [2]Tweto received awards including the Distinguished Service Award of the Department of the Interior (1970) and the Scientist of the Year Award by the Rocky Mountain Association of Geologists (1978). [2]
Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised great mountain ranges while the forces of ...