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27 Cards in this Set
- Front
- Back
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Steno's Laws list (2) |
Law of Super Position Law of Cross Cutting Relationship |
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Define Steno's Law of Super Position |
stuff on the bottom is older than stuff on the top |
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Define Steno's Law of Cross Cutting Relationships |
What cuts into a layer is younger than the layer |
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Define contour lines |
lines on a map that establish elevation
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list rules of contour lines (5) |
they can not intersect
they must have the same elevation throughout the same line
there interval will be set on the map
if they are closer together the slope is steep
if they are farther apart the slope is gentle
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define Hatchures |
a type of contour line that includes hatch marks
the hatch marks indicate a depression in elevation
the slope of the depression is on the side with the hatch marks
the elevation of the hatchure is the the same as the elevation of the last regular contour line
if there are no contour lines or additional hatchures inside the first hatchure than the drepression is less than the contour line elevation |
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List 3 things that can impact errosion |
1. rock type: sandstone erodes more than limestone
2. age of the formation. newer rockies are sharper than the older apalachians
3. rain shadow: the side of a mountain that gets more rain will experience more erosion than the other side |
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list two things that can cause a depression |
volcano
meteor strike |
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What is the Rule of Vs |
a V patten in contour lines indicates either ridges or valleys.
If the bottom of the V points towards lower elevation the pattern indicates a ridge
If the bottom of the V points towards higher elevation the pattern indicates a valley
If the valley is a river valley the bottom of the V points upstream |
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List 4 ways maps are used |
1. to find your location
2. to communicate your location to others
3. to graphically represent information
4. to examine events in earth's history as recorded in the rock layers |
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List 6 types of maps |
1. Road
2. topographic
3. Geologic
4. Bathymetric
5. Hazard
6. Paleogeographic |
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What does a road map tell you |
how to get get from one location to another |
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what does a topographic map tell you |
elevations of terrain |
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what does a geologic map tell you |
earth's history recorded in rock layers |
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what does a bathymetric map tell you |
about the ocean floor |
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what does a hazard map tell you |
where faults are, where landslides occur |
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what does a paleogeographic map tell you |
how have the positions of the continents changed over earth's history |
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List the 7 major concepts of topographic maps |
1. scale
2. magnetic declination
3. coordinates, especially longitude and latitude
4. elvations
5. contour lines
6. slope grade, valleys, plateaus, canyons, stream beds, ridges and depressions
7. rule of Vs |
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what is a map |
a map is a representation of the earth or part of it |
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what are contours |
imaginary lines that join points of equal elevation on on the surface of the land above or below a reference surface |
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do topographic maps only show contour lines? |
no they also show streets, buildings, streams, vegetation, etc. |
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are all symbols the same on every topographic map? |
no, the symbols are constantly being refined, so they may differ slightly from map to map |
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what is a provisional topographic map |
a large scale map on which some of the symbols and lettering are hand drawn |
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what color is used for topographic contours |
brown |
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what is the elevation difference between adjacent contours called |
intervals |
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what color are bathymetric contours? |
blue or black
they show the shape and slope of the ocean floor |
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what is an index contour line |
a contour line with an elevation value |
