In the field of mapmaking, most often mapmakers are making maps in relation to different geographical locations. While this is the case, there are also several others. In one case, this is a geologic map which pertains to showing different geological aspects in the area and the measurements between the surface and various geological units.
In most cases, geologic data and strata are shown by colors and symbols to indicate a location based on land surface. Whereas, structural data such as plunges, lineages, folds and faults are shown with strikes and dips or trend marks. As a result, these markings often create a 3-D effect in the object.
Locating and marking the surface can often be a bit more difficult. Still, doing so can often be accomplished by using contour lines to illustrate the surface and subsurface and topographic trends. Whereas, it is important when doing so, to calculate measurements carefully based on a number of factors. These factors often include, bedrock, backfill, topsoil and related factors.
Currently, the oldest geological map known to exist is that of the Turin Papyrus which has been well preserved since being found. Being a map that dates back to 1150 BCE, it was an important archaeological, geographical, geological and historical find. For, the map depicted stone and gold deposits from different areas of Egypt. In fact, it is believed that the map may have even been integral in the building of the pyramids.
Whereas, the earliest map known to exist in the modern era dates back to 1771, the map which shows part of Auyergne is made from basalt using prisms, balls and other markings to denote different locations. While this is the case, there have been a number of other geological maps developed in different areas of the world since that time. As such, there have been a number of archaeological, geographical, geological and historical findings which may have never taken place if not for these early surveyors and mapmakers.
Credit for developing the first geological map in the United States goes to William Maclure. For, in 1807 Maclure undertook the task of traveling to and surveying every state in the Union at the time. During the survey, it is reported that Maclure crossed the Allegheny mountains more than fifty times.
It was a survey and journey which would take over twenty four months. Reports have shown that the mapmaker and surveyor crossed over the Allegheny mountains at least fifty times before returning home. More recently, five classes of rock have been identified on the map which appear to only exist in the Eastern most states of the country.
While most all geological maps are similar to the first one created by Maclure, many are now superimposed over topographical maps with a letter, symbol and color mark to describe the type of geological aspects in the area. While the color relates to the exposure of the bedrock from the surface, symbols are often used to show fossils, fault lines and other data. As such, these maps are used in a number of different areas including marine biology, geology, history, topology and earthquake sciences.
In most cases, geologic data and strata are shown by colors and symbols to indicate a location based on land surface. Whereas, structural data such as plunges, lineages, folds and faults are shown with strikes and dips or trend marks. As a result, these markings often create a 3-D effect in the object.
Locating and marking the surface can often be a bit more difficult. Still, doing so can often be accomplished by using contour lines to illustrate the surface and subsurface and topographic trends. Whereas, it is important when doing so, to calculate measurements carefully based on a number of factors. These factors often include, bedrock, backfill, topsoil and related factors.
Currently, the oldest geological map known to exist is that of the Turin Papyrus which has been well preserved since being found. Being a map that dates back to 1150 BCE, it was an important archaeological, geographical, geological and historical find. For, the map depicted stone and gold deposits from different areas of Egypt. In fact, it is believed that the map may have even been integral in the building of the pyramids.
Whereas, the earliest map known to exist in the modern era dates back to 1771, the map which shows part of Auyergne is made from basalt using prisms, balls and other markings to denote different locations. While this is the case, there have been a number of other geological maps developed in different areas of the world since that time. As such, there have been a number of archaeological, geographical, geological and historical findings which may have never taken place if not for these early surveyors and mapmakers.
Credit for developing the first geological map in the United States goes to William Maclure. For, in 1807 Maclure undertook the task of traveling to and surveying every state in the Union at the time. During the survey, it is reported that Maclure crossed the Allegheny mountains more than fifty times.
It was a survey and journey which would take over twenty four months. Reports have shown that the mapmaker and surveyor crossed over the Allegheny mountains at least fifty times before returning home. More recently, five classes of rock have been identified on the map which appear to only exist in the Eastern most states of the country.
While most all geological maps are similar to the first one created by Maclure, many are now superimposed over topographical maps with a letter, symbol and color mark to describe the type of geological aspects in the area. While the color relates to the exposure of the bedrock from the surface, symbols are often used to show fossils, fault lines and other data. As such, these maps are used in a number of different areas including marine biology, geology, history, topology and earthquake sciences.
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