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Essay On Geological Map

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Geological Map
Definition: A geologic map is a map made to show geological features, it display the arrangement of geologic features of a particular area. These features can include such things as types of rocks, minerals, faults and groundwater. From studying a geologic map the user can better understand possible dangers like the potential for floods or earthquakes and it helps to locate important deposits of energy resources such as water, natural gas, oil and minerals. The users of geologic maps can gain a better understanding of Earths makeup through the use of colors, lines, symbols and letters.
The main features of geologic maps are its colors, each color represents a different geologic unit. A geologic unit is a volume of a certain kind of rock of a given age range. So a sandstone …show more content…

We have two main types of contacts which are called depositional contacts and faults. Depositional contacts are created when geologic units are composed over, under or next to each other. This place called depositional contact is indicated by a thin line. Geologic units can be moved over time by faults. Faults are cracks or fractures in Earth’s crust (outer portion of Earth’s surface) caused by the movement of land masses called plates on either side of the fault line. When plates move suddenly the result is an earthquake. A fault line (a thick line with the same geologic unit on both sides of the line) indicates geologic units that have been moved by faults after they have been formed.

Some geologic words
Bed is a mass of rock which extends under large areas and is bounded by different materials.
Fault is a crack that runs through rock which results in tectonic forces.
Fold is a bend in a layer of rock.
Plates are large regions of earth’s surface, composed of the crust and uppermost mantle which move about, forming many of earths major geologic surface

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