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A contact line on a geologic map is noted by a solid or dotted horizontal line with breaks sectioned off by a small vertical line below it. A fault line is noted as a horizontal dotted line with wide dashes.
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∙ 9y ago
Wiki User
∙ 14y agoA contact is a surface where one rock type meets a differing rock type.
On a geological map, this is marked as a solid black line where the contact is confirmed by surface observations and so can be plotted accurately. If the presence of the contact is certain, but its exact location is uncertain it will be marked by a dashed black line.
See the related link from the US Geological Survey.
Wiki User
∙ 9y agoGeologic maps show the distribution of various igneous, sedimentary, and metamorphic rock. The contact lines seperate and mark the boundary between two adjacent geologic formations.
Wiki User
∙ 11y agotwo geographic units meet
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How are geologic units of similar ages shown on a geologic map?
A geologic map shows geologic units of various rock types and ages. Geologic units of similar ages are shown on a geologic map using the same color and symbol.
Where can you get a geologic map of southern Italy?
The geologic map of Southern Italy can be found at the Geological Mapping department in Italy. It contains information on the various geologic features in Southern Italy.
What do the black thick lines on a Geologic map mean?
That depends on what type of map you are referring to. On a weather map it's usually part of a warm front. On a road map they could be any type of road the cartographer specifies. On a topographical map they could be elevation lines. On the Washington Transit Map it's the red line train. Check the legend and it will more than likely tell you.
What is a geologic cross section?
Taken along a line drawn on a map, it is a diagram of the structure and position of the rock layers present beneath the surface along this line. Geologists learn how to construct this 3rd dimensional information from a Geologic map, If you want to know how to get at an ore body hidden underground, you need a Geologist to work out where and how deep to dig. Cross sections will be needed to do this.
What sort of information are usually shown on a geologic map?
Where rocks outcrop or would outcrop if they could be seen.
How are geologic units of similar ages shown on a geologic map?
A geologic map shows geologic units of various rock types and ages. Geologic units of similar ages are shown on a geologic map using the same color and symbol.
What do scientists need know about geologic formations to make a geologic map?
To have a scientist make a geologic map, they need to know something about geologic formation to show what the map is meaning. They use color to show the differences of the kind of rock and its age.
Where can you get a geologic map of southern Italy?
The geologic map of Southern Italy can be found at the Geological Mapping department in Italy. It contains information on the various geologic features in Southern Italy.
what does a topographic map?
Geologic ELEVATION.
What does a topographic map measure?
Geologic ELEVATION.
How are geologic units of similar ages are shown on a geologic map.?
on geologic maps, geologic units are distinguished by color. UNITS OF SIMILAR ARE ASSIGNED COLOR IN THE SAME COLOR FAMILY.
How geologic units of similar ages are shown on a geologic map?
on geologic maps, geologic units are distinguished by color. UNITS OF SIMILAR ARE ASSIGNED COLOR IN THE SAME COLOR FAMILY.
Why isn't soil included in a geologic map?
Because you can not dig it
What are rocks of a given rock type and range?
Geologic Map
How can a geologic map be used to find natural resources?
Hi zup
Map that shows a cross section?
a cross section map is a map that shows the layers of rock inside a landform.
What do the black thick lines on a Geologic map mean?
That depends on what type of map you are referring to. On a weather map it's usually part of a warm front. On a road map they could be any type of road the cartographer specifies. On a topographical map they could be elevation lines. On the Washington Transit Map it's the red line train. Check the legend and it will more than likely tell you.
