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27 Cards in this Set

  • Front
  • Back

Steno's Laws list (2)

Law of Super Position

Law of Cross Cutting Relationship

Define Steno's Law of Super Position

stuff on the bottom is older than stuff on the top

Define Steno's Law of Cross Cutting Relationships

What cuts into a layer is younger than the layer

Define contour lines

lines on a map that establish elevation

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

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

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

list two things that can cause a depression


meteor strike

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

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

List 6 types of maps

1. Road

2. topographic

3. Geologic

4. Bathymetric

5. Hazard

6. Paleogeographic

What does a road map tell you

how to get get from one location to another

what does a topographic map tell you

elevations of terrain

what does a geologic map tell you

earth's history recorded in rock layers

what does a bathymetric map tell you

about the ocean floor

what does a hazard map tell you

where faults are, where landslides occur

what does a paleogeographic map tell you

how have the positions of the continents changed over earth's history

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

what is a map

a map is a representation of the earth or part of it

what are contours

imaginary lines that join points of equal elevation on on the surface of the land above or below a reference surface

do topographic maps only show contour lines?

no they also show streets, buildings, streams, vegetation, etc.

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

what is a provisional topographic map

a large scale map on which some of the symbols and lettering are hand drawn

what color is used for topographic contours


what is the elevation difference between adjacent contours called


what color are bathymetric contours?

blue or black

they show the shape and slope of the ocean floor

what is an index contour line

a contour line with an elevation value