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Geology and branches of geology
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2.
3. Geology means
GEO=Earth,
LOGY=Study of science
ā It deal with the study of Origin , age, interior
structure, and history of earth
ā Evolution and modiļ¬cation of various
surface features like rivers, mountains and
Lakes.
ā Material makeups the earth.
4. Geology plays a very important role in the ļ¬eld of civil
engineering.
ā Its knowledge is required for foundation faults.
ā For design of highways and roads.
ā In construction of tunnels.
ā Its knowledgeis helpful for river control and shipping work.
ā Nature of soil materials can be ļ¬nd out.
ā It provides knowledge about materials used for construction.
ā Its knowledge is helpful for constructing dams.
ā Geotechnical engineers needs knowledgeabout this subject
for excavation work (digging work).
5. Main and Allied Branch of Geology
Main Branch Allied Branch
Physical Geology Engineering Geology
Mineralogy Mining Geology
Petrology Geophysics
geomorphology Geohydrology
Historical Geology Geochemistry
Economic Geology rock mechanics
Oceanography
6. 1. Physical Geology deals with the different Physical feature of the
earth both at the exterior and interior of earth structure such as
Mountain, rivers, lakes, glaciers and volcanoes, earthquakes.
2. Geomorphology deals with the study of things which are present
only on the surface of the earth, such as mountains, rivers, lakes
etc.,
3. Mineralogy deals with the study of minerals, which includes
detailed mode of formation, composition, occurrence, types,
association properties uses etc .
4. Petrology: Petro- rock, Logy- study
It deals with the study, formation,occurrence, composition of
different types of rocks which are present on earth crust.
Cont..,
7. Cont..,
5. Historical Geology - study of past history of the earth and its
structure based on the fossil material obtained. Based on that fairly
accurate estimates can be made.
6. Geochemistry- study of different chemical compositions of earth
along its distribution and availability in different zones.
7. Geophysics- Study of earthās magnetic forces, electrostatic
forces,knowledge about cosmology and seismic waves is studied.
8. Geohydrology- Interaction between hydrology with earth structure
9. Oceanography - study of physical, structural, genetic and chemical
compositions and behaviour of water bodies especially ocean.
12. Scope of Geology
ā Geology provides necessary information about the construction
materials at the site used in the construction of buildings, dams,
tunnels, tanks, reservoirs, highways and bridges.
ā Geological information is most important in planning stage, design
phase and construction phase of an engineering project.
ā Geology is useful to know the method of mining of rock and
mineral deposits on earthās surface and subsurface.
ā Geology is useful for supply, storage and ļ¬lling up of
reservoirs with water.
ā This is the only subject which gives the information about the
earth surface.