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623:. Subsurface maps typically depict the three-dimensional form of geological surfaces by means of contours and cross sections. Computer-based models are increasingly used to provide more comprehensive information storage and greater flexibility of presentation. In the United States, the 50 state surveys are coordinated by the
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for the benefit of the nation. A geological survey map typically superimposes the surveyed extent and boundaries of geological units on a topographic map, together with information at points (such as measurements of orientation of bedding planes) and lines (such as the intersection of faults with the
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to illustrate the three-dimensional interpretation. Subsurface geological and geophysical maps, providing limited coverage of deeper geology (known, for example, from drilling for oil or gas), are maintained internally by major oil companies and regulators. Some geological survey organisations have
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land surface). The maps and reports created by geological survey organisations generally aim for geographic continuity and completeness in establishing the spatial patterns of near-surface rock units. The map may include
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collaborated with them to include subsurface geology in their systematic surveys, for example, the
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Individual states or provinces may also have a geological survey. Examples include:
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Investigation of the geology in a region for creating a geological map
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beneath a given piece of ground for the purpose of creating a
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Geological Atlas of the
Western Canada Sedimentary Basin
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Federal
Institute for Geosciences and Natural Resources
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869:International list of country geological surveys
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229:Principle of inclusions and components
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435:Geology of solar terrestrial planets
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204:Principle of original horizontality
897:. You can help Knowledge (XXG) by
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770:Geological Survey of Queensland
735:United States Geological Survey
214:Principle of lateral continuity
852:Primary divisions of Surveying
776:Pennsylvania Geological Survey
224:Principle of faunal succession
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709:Geological Survey of Slovenia
704:Geological Survey of Pakistan
609:and advance the knowledge of
752:California Geological Survey
694:Geological Survey of Ireland
684:Geological Survey of Finland
669:Geological Survey of Austria
714:Geological Survey of Sweden
699:Geological Survey of Norway
674:Geological Survey of Canada
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689:Geological Survey of India
186:Laws, principles, theories
65:Science of the solid Earth
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746:Alberta Geological Survey
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635:British Geological Survey
194:Stratigraphic principles
30:Not to be confused with
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653:China Geological Survey
782:Utah Geological Survey
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209:Law of superposition
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292:Landform structures
173:Geologic time scale
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807:Geophysical survey
599:aerial photography
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443:By planet and body
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283:Structure of Earth
18:Geological surveys
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899:expanding it
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263:Geochemistry
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857:Mine survey
837:Prospecting
819:Soil survey
801:Cave survey
772:(Australia)
611:geosciences
591:geophysical
394:Engineering
316:Volcanology
254:Composition
138:Metamorphic
133:Sedimentary
938:Categories
842:OneGeology
306:Glaciology
268:Mineralogy
163:Weathering
729:Swisstopo
607:inventory
587:boreholes
583:landforms
404:Forensics
358:Geologist
278:Petrology
826:See also
766:(Canada)
748:(Canada)
649:(Taiwan)
579:outcrops
409:Military
347:Research
144:Sediment
119:Minerals
100:Timeline
91:Glossary
86:Category
42:a series
40:Part of
891:geology
567:geology
452:Mercury
370:Methods
168:Erosion
128:Igneous
96:History
81:Outline
51:Geology
832:Survey
737:(USGS)
643:(BRGM)
502:Charon
492:Triton
399:Mining
247:Topics
158:Strata
889:This
795:Types
790:(USA)
784:(USA)
778:(USA)
760:(USA)
754:(USA)
637:(BGS)
575:model
497:Pluto
487:Titan
477:Ceres
472:Vesta
457:Venus
362:List)
76:Index
895:stub
601:and
581:and
467:Mars
462:Moon
124:Rock
573:or
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561:A
482:Io
44:on
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360:(
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