Ad
related to: how to read a geologic map
Search results
Results From The WOW.Com Content Network
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.
A stratigraphic column is a representation used in geology and its subfield of stratigraphy to describe the vertical location of rock units in a particular area. A typical stratigraphic column shows a sequence of sedimentary rocks, with the oldest rocks on the bottom and the youngest on top. In areas that are more geologically complex, such as ...
The geologic time scale is a way of representing deep time based on events that have occurred throughout Earth's history, a time span of about 4.54 ± 0.05 Ga (4.54 billion years). [5] It chronologically organises strata, and subsequently time, by observing fundamental changes in stratigraphy that correspond to major geological or ...
Stratigraphy is a branch of geology concerned with the study of rock layers (strata) and layering (stratification). It is primarily used in the study of sedimentary and layered volcanic rocks. Stratigraphy has three related subfields: lithostratigraphy (lithologic stratigraphy), biostratigraphy (biologic stratigraphy), and chronostratigraphy ...
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 drawn in different ways, but ...
While this was not the world's first geological map (a map of the United States by William Maclure was published six years earlier), [12] [13] Smith's was the first geological map covering such a large area in detail, [14] and is one of the first stratigraphical analyses to utilize palaeontological indices. [15]
The Commission for the Geological Map of the World (CGMW or CCGM in French) is an international association in the field of geology. Its main role is the production of small-scale maps of continents and oceans, regions of the Earth and the whole World in the field of Geosciences. It is an organization affiliated to IUGS International Union of ...
Cross section (geology) A cross section of the Anadarko Basin. The letters A and B at the top correspond to the line labeled A--B on the smaller map. In this example, the vertical scale is exaggerated compared to the horizontal scale. A cross section or cross-section, in geology, is a diagram representing the geologic features intersecting a ...