its called an index or index conotour line and is every fitth line on a topographic map.
Contour interval
1220 ft
There will be a continuous line describing the perimeter of the depression, and along this line will be short spikes extending inwards; indicating that there may be a cliff there. Ordinarily, they will be marked in black, but on a glacier, they will be shown in blue. This convention should be indicated on the legend of the map.
A break in the earth's crust is called a fault line.
It is called a Squall Line
topographic elevation
lines of equal elevation are called contour lines.
Contour lines represent connecting points of equal elevation on a topographic map.
The scale of contour lines on a topographic (terrain) map is called the "contour interval".
The "neat" line.
Closely spaced contour line on a topographic map shows that the land is steep.
It depends how steep the mountain or hill is, usually the contour lines are bolded and is every fifth line. hope this helped
On a topographic map a contour line connects points of equal elevation.....hope that helped
A contour is a line that joins points of equal elevation.
A contour.
Contour lines show elevation.
the difference in elevation represented by each contour line on a topographic map